Ultrafast Dynamics Group
Frédéric Laquai's Group


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Total result(s) found: 90
  •  Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in All-Small-Molecule Photovoltaics

    H. Tang, C. Yan, S. Karuthedath, H. Yin, Y. Gao, J. Gao,L. Zhang, J. Huang, S. K. So, Z. Kan, F. Laquai, G. Li, and S. Lu. Sol. RRL 2020

    DOI: 10.1002/solr.20190052

carrier lifetime, charge separation, energetic disorders, fluorination, organic solar cells
  • Build-up of Triplet State Population in Operating TQ1:PC71BM Devices Does Not Limit Their Performance 

    S. Karuthedath, J. Gorenflot, A. Melianas, Z. Kan, M. Kemerink, F. Laquai. J. Phys. Chem. Lett. 2020, DOI: 10.1021/acs.jpclett.0c0075​

TQ1:PC71BM, Organic solar cells , Triplet state dynamics
  • 17.1% Efficient SingleJunction Organic Solar Cells Enabled by nType Doping of the BulkHeterojunction.
    Y. Lin, Y. Firdaus, M. I. Nugraha, F. Liu, S. Karuthedath, A.H. Emwas, W. Zhang, A. Seitkhan, M. Neophytou, H. Faber, E. Yengel, I. McCulloch, L. Tsetseris, F. Laquai, T. D. Anthopoulos, Adv. Sci. 2020, 1903419.

Additives, Molecular doping, Nonfullerene acceptors, Organic photovoltaics
  • Enhanced photocatalytic hydrogen evolution from organic semiconductor heterojunction nanoparticles. 

    J. Kosco, M. Bidwell, H. Cha, T. Martin, C. T. Howells, M. Sachs, D. H. Anjum, S. G. Lopez, L. Zou, A. Wadsworth, W. Zhang, L. Zhang, J. Tellam, R. Sougrat, F. Laquai, D. M. DeLongchamp, J. R. Durrant and I. McCulloch. Nat. Mater. (2020). https://doi.org/10.1038/s41563-019-0591-1
Chemistry, Materials science, Nanoscience and technology
  • ​Design, Synthesis and Selective Functionalization of a Rigid, Truxene Derived Pure Blue‐Emitting Chromophore. 
    B. Kaur, S. Karuthedath, C. S. P. De Castro, F. Laquai, J. Jacob, Chemistry Select 2020, DOI: 10.1002/slct.201903682.​
chromophores, cross coupling, fluorescence, TDDFT, transient absorption spectroscopy
  • ​Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces. S. Sansoni, M. De Bastiani, E. Aydin, E. Ugur, F. H. Isikgor, A. Al‐Zahrani, F. Lamberti, F. Laquai, M. Meneghetti, S. De Wolf, Advanced Materials Technology 2020, DOI: 10.1002/admt.201901009.
eco‐friendly spray deposition, laser ablation, perovskites, textured surfaces
  •  Afterglow Effects as a Tool to Screen Emissive Non-Geminate Charge Recombination Processes in Organic Photovoltaic Composites

    P. E. Keivanidis, G. Itskos, Z. Kan, E. A. Sarduy, H. Goudarzi, V. Kamm, F. Laquai, W. Zhang, C. J. Brabec, G. Floudas, I. McCulloch

    ACS Appl. Mater. Interfaces 2019, DOI: 10.1021/acsami.9b1603

solar cell; photodetector; perylene diimides; fill factor; charge trapping; delayed luminescence; multiple-diode equivalent circuit; non-fullerene acceptors
  • Novel Wide Bandgap Non-Fullerene Acceptors for Efficient Tandem Organic Solar Cells

    Y. Firdaus, Q. He,Y. Lin, F. A. A. Nugroho, V. M. Le Corre, E. Yengel, A. H. Balawi, A. Seitkhan, F. Laquai, C. Langhammer, F.Liu, M. Heeney and T. D. Anthopoulos, J. Mater. Chem. A, 2019, DOI: 10.1039/C9TA11752K

Organic photovoltai, PBDB-T:IDTT, PTB7-Th:IEICO
  • Impact of Residual Lead Iodide on Photophysical Properties of Lead Triiodide Perovskite Solar Cells

    J. Khan, A. Sheikh, M. Alamoudi, D. Barrit, E. Ugur, F.  Laquai, A. Amassian

    Energy Technology 2019, DOI.org/10.1002/ente.201900627 
charge carrier recombination, interfacial recombination, lead iodide, perovskites, spectroscopy
  • Highly-Crystalline Near-Infrared Acceptor Enabling Simultaneous Efficiency and Photostability Boosting in High-Performance Ternary Organic Solar Cells

    H. Yin, C. Zhang, H. Hu, S. Karuthedath, Y. Gao, H. Tang, C. Yan, L. Cui, P. W. K. Fong, Z. Zhang, Y. Gao, J. Yang, Z.  Xiao, L. Ding, F. Laquai, S. K. So and G. Li​, ACS Appl. Mater. Interfaces, DOI: 10.1021/acsami.9b12833

organic solar cell; photostability; ternary solar cell; near-infrared acceptor
  • Enhancing the charge extraction and stability of perovskite solar cells using strontium titanate (SrTiO3) electron transport layer.

    M. Neophytou, M. De Bastiani, N. Gasparini, E. Aydin, E. Ugur, A. Seitkhan, F. Moruzzi, Y. Choaie, A. J. Ramadan, J. Troughton, R. Hallani, A. Savva, L. Tsetseris, S. Inal, D. Baran, F. Laquai, T. D. Anthopoulos, H. J. Snaith, S. De Wolf, I. McCulloch,

    ACS Applied Energy Materials 2019, DOI: 10.1021/acsaem.9b01567

electron selective contact, strontium titanate, perovskite solar cells
  • Carrier Extraction from Perovskite to Polymeric Charge Transport Layers Probed by Ultrafast Transient Absorption Spectroscopy. 
    E. Ugur, J. Khan, E. Aydin, M. Wang, M. Kirkus, M. Neophytou, I. McCulloch, S. De Wolf, F. Laquai, 

    ACS Journal of Physical Chemistry Letters 2019, DOI: 10.1021/acs.jpclett.9b02502

perovskite solar cells, ultrafast spectroscopy, interface recombination, carrier dynamics, hole extraction
  • 17% Efficient Organic Solar Cells Based on Liquid Exfoliated WS2 as a Replacement for PEDOT:PSS 

    Y. Lin, B. Adilbekova, Y. Firdaus, E. Yengel, H. Faber, M. Sajjad, X. Zheng, E. Yarali, A. Seitkhan, O. M. Bakr, A. El-Labban, U. Schwingenschlögl, V. Tung, I. McCulloch, F. Laquai, and T. D. Anthopoulos.

    Advanced Materials, 1902965. doi:10.1002/adma.201902965​​​​

2D transition metal disulfides, hole transport layers, liquid exfoliation, nonfullerene organic solar cells, WS2, MoS2
  • Impact of Fullerene on the Photophysics of Ternary Small Molecule Organic Solar Cells

    S. Karuthedath, Y. Firdaus, R-Z. Liang, J. Gorenflot, P. M. Beaujuge, T. D. Anthopoulos, F. Laquai, 

    Advanced Energy Materials 2019, 201901443

bulk heterojunction, charge generation, energy transfer, fullerene, ternary organic solar cells, ultrafast spectroscopy
  • Impact of polymorphism on the optoelectronic properties of a low-bandgap semiconducting polymer​

    M. Li, A. H. Balawi, P. J. Leenaers, L. Ning, G. H. L. Heintges, T. Marszalek, W. Pisula, M. M. Wienk, S. C. J. Meskers, Y. Yi, F. Laquai and R. A. J. Janssen, Nature Communicationsvolume 10, Article number: 2867 (2019)
polymer, 3-alkylthiophene, P(NDI2OD-T2)
  • Direct and energytransfer mediated charge transfer state formation and recombination in triangulenespacerperylenediimide multichromophores: lessons for photovoltaic applications

    A. H. Balawi, S. Stappert, J. Gorenflot, C. Li, K. Müllen, D. Andrienko, F. Laquai, J. Phys. Chem. C 2019, DOI: 10.1021/acs.jpcc.9b05149
Charge transfer, triangulene‐spacer‐perylenediimide multichromophores, UV−vis spectrum, TD-DFT
  • P3HT Molecular Weight Determines the Performance of P3HT:O-IDTBR Solar Cells

    J. I. Khan, R. S. Ashraf, M. A. Alamoudi, M. N. Nabi, H. N. Mohammed, A. Wadsworth, Y. Firdaus, W. Zhang, T. D. Anthopoulos, I. McCulloch, F. Laquai
    Solar RRL​, 2019, 
    DOI: 10.1002/solr.201900023.​
non-fullerene acceptors, transient absorption, molecular weight, P3HT, O-IDTBR
p-i-n perovskite solar cell, interface engineering, organic molecule, cathode interlayer, semi-transparent solar cell
  • Negligible Energy Loss During Charge Generation in Small-Molecule/Fullerene Bulk-Heterojunction Solar Cells Leads 

    to Open-Circuit Voltage over 1.10 V

    M. Babics, T. Duan, A. H. Balawi, R.-Z. Liang, F. Cruciani, I.-D. Carja, D. Gottlieb, I. McCulloch, K. Vandewal, F. Laquai and P. M. Beaujuge ACS Appl. Energy Mater., 2019, DOI: 10.1021/acsaem.8b02020​

organic photovoltaics, small-molecule donor, oligothiophene, fluorination, high open-circuit voltage, low energy loss
  • Key Parameters Requirements for NonFullereneBased Organic Solar Cells with Power Conversion Efficiency >20%

    Y. Firdaus, V. M. Le Corre, J. I. Khan, Z. Kan, F. Laquai, P. M. Beaujuge, T.  D. Anthopoulos

    Adv. Sci. 2019, 1802028​

bulk‐heterojunction solar cells, drift‐diffusion model, nonfullerene acceptors, numerical device simulations, organic photovoltaics, tandem devices
  • Terminal Group Engineering for Small-Molecule Donor Boosts the Performance of Nonfullerene Organic Solar Cells

    T. Duan, H. Tang, R .-Z.  Liang, J. Lv, Z. Kan, R. Singh, M. Kumar, Z. Xiao, S. Lu  and F. Laquai, J. Mater. Chem. A, 2019, DOI: 10.1039/C8TA11420J.​
nonfullerene acceptors, organic photovoltaics, small molecule, solvent vapor annealing, ternary solar cells
  • ​​Charge Photogeneration and Recombination inMesostructured CuSCN-Nanowire/PC70BM Solar
    Y. Firdaus, A. Seitkhan, F. Eisner, W.‐Y. Sit, Z. Kan, N. Wehbe, A. H Balawi, E. Yengel, S. Karuthedath, F. Laquai, T. D Anthopoulos Solar RRL​, 2018, 1800095
charge photogeneration, charge recombination, copper (I) thiocyanate, PCBM, solar cells
  • Organic solar cells based on anthracene‑containing PPE–PPVs and non‑fullerene acceptors

    S. Alam, R. Meitzner, O. V. Nwadiaru,  C. Friebe, J. Cann, J. Ahner, C. Ulbricht, Z. Kan, S. Höppener, M. D. Hager, D. A. M. Egbe, G. C. Welch, F. Laquai, U. S. Schubert, H. Hoppe. Chemical Papers (2018) 72:1769–1778
Non-fullerene acceptors (NFA) · Bulk-heterojunction (BHJ) · Organic solar cell (OSC)
  • Impact of Structural Polymorphs on Charge Collection and Non-Geminate Recombination in Organic Photovoltaic Devices

    P. E. Keivanidis, J. I. Khan, L. Katzenmeier, Z. Kan, S. Limbu, M. K. Constantinou, E. Lariou, G. Constantinides, S. C. Hayes, J.–S. Kim, and F. Laquai

    J. Phys. Chem. C,

    DOI: 10.1021/acs.jpcc.8b09825

organic photovoltaic, poly(3-hexyl-thiophene), (P3HT)
  • Charge and Triplet Exciton Generation in Neat PC70BM Films and Hybrid CuSCN:PC70BM Solar Cells

    S. Karuthedath, J.  Gorenflot, Y. Firdaus, W‐Y. Sit, F. Eisner, A.Seitkhan, M.K. Ravva, T.D. Anthopoulos, F. Laquai

    Adv. Energy Mater. 2018, DOI: 10.1002/aenm.20180247

copper thiocyanate, fullerene, hybrid solar cells, transient absorption spectroscopy, triplet exciton
  • ​Room-Temperature Sputtered Nanocrystalline Nickel Oxide as Hole Transport Layer for p−i−n Perovskite Solar Cells

    ​Erkan Aydin, Joel Troughton, Michele De Bastiani, Esma Ugur, Muhammad Sajjad, Areej Alzahrani, Marios Neophytou, Udo Schwingenschlögl, Frédéric Laquai, Derya Baran, and Stefaan De Wolf
    ACS Appl. Energy Mater., DOI: 10.1021/acsaem.8b01263​​
perovskites solar cells, room-temperature processing, sputtering, nickel oxide, conformal deposition, large area, p-i-n perovskite device configuration
  • A Universal Double-Side Passivation for High Open-Circuit Voltage in Perovskite Solar Cells: Role of Carbonyl Groups in Poly(methyl methacrylate)

    Jun Peng, Jafar I. Khan,  Wenzhu Liu,  Esma Ugur,  The Duong,  Yiliang Wu,  Heping Shen,  Kai Wang, Hoang Dang,  Erkan Aydin,  Xinbo Yang,  Yimao Wan,  Klaus J. Weber,  Kylie R. Catchpole,  Frédéric Laquai, Stefaan De Wolf,  Thomas P. White​, Adv. Energy Mater. 2018, 1801208​ DOI: 10.1002/aenm.201801208​

carbonyl group, nonradiative recombination, passivation, perovskite solar cells, undercoordinated Pb atoms
non‐fullerene acceptors, organic photovoltaics, polymer solar cells, small molecular acceptors, wide‐bandgap acceptors
  • Progress in Poly (3‐Hexylthiophene) Organic Solar Cells and the Influence of Its Molecular Weight on Device Performance​

    A. Wadsworth, Z. Hamid, M. Bidwell, R. S. Ashraf, J. I. Khan, D. H. Anjum, C. Cendra, J. Yan, E. Rezasoltani, A. A. Y. Guilbert, M. Azzouzi, N. Gasparini, J. H. Bannock, D. Baran, H. Wu, J. C. de Mello, C. J. Brabec, A.  Salleo, J. Nelson, F. Laquai, I. McCulloch

    Adv. Energy Mater. DOI: 10.1002/aenm.201801001​​

IDTBR, molecular weight, nonfullerene, organic photovoltaics, poly (3‐hexylthiophene)
  • BODIPY-pyrene and perylene dyads as heavy atom-free singlet oxygen sensitizers​

    M.A. Filatov, S. Karuthedath, P.M. Polestshuk, S. Callaghan, T. Wiesner, K.J. Flanagan, F. Laquai and M.O. Senge
    ChemPhotoChem 2018, DOI: 10.1002/cptc.201800020
charge transfer, heavy-atom-free sensitizer, photo- induced electron transfer, singlet oxygen, triplet excited state
  • ​Efficient Long - Range Electron Transfer Processes in Polyfluorene – Perylene Diimide Blends

    A. Isakova, S. Karuthedath, T. Arnold, J. Howse, P. D. Topham, D. T. W. Toolan, F. Laquai and L. Lüer, Nanoscale, 2018, DOI: 10.1039/C8NR01064A.

perylene diimide (PDI), polyfluorene (PFO)
  • Triphenylamine-Based Push–Pull σ–C60 Dyad As Photoactive Molecular Material for Single-Component Organic Solar Cells: Synthesis, Characterizations, and Photophysical Properties.

    A. Labrunie, J. Gorenflot, M. Babics, O. Alévêque, S. Dabos-Seignon, A. H. Balawi, Z. Kan, M. Wohlfahrt, E. Levillain, P. Hudhomme, P. M. Beaujuge, F. Laquai, C. Cabanetos, and P. Blanchard.
    Chemistry of Materials Article ASAP, 2018, DOI: 10.1021/acs.chemmater.8b01117
  • Mixed Domains Enhance Charge Generation and Extraction in Bulk‐Heterojunction Solar Cells with Small‐Molecule Donors.
    O. Alqahtani, M. Babics, J. Gorenflot, V. Savikhin, T. Ferron, A.H. Balawi, A. Paulke, Z. Kan, M. Pope, A.J. Clulow, J. Wolf, P.L. Burn, I.R. Gentle, D. Neher, M.F. Toney, F. Laquai, P.M. Beaujuge, B.A. Collins

    Adv. Energy Mater. 2018, 1702941 DOI:10.1002/aenm.201702941

Charge transport, domain purity, microscopy, mixed domains, organic solar cells, photovoltaic devices, resonant X-ray scattering, small molecules, transient spectroscopy
  • Thermal Annealing Reduces Geminate Recombination in TQ1:N2200 All-Polymer Solar Cells​

    S. Karuthedath, A. Melianas, Z. Kan, V. Pranculis, M. Wohlfahrt, J.I. Khan, J. Gorenflot, Y. Xia, O. Inganäs, V. Gulbinas, M. Kemerink, and F. Laquai
    Journal of Materials Chemistry A, 2018.
    DOI: 10.1039/c8ta01692e​
TQ1:N2200, Polymer Solar Cells
CDTBM, IDTTBM, BHJ solar cells
  • Control of triplet state generation in heavy atom-free BODIPY-anthracene dyads by media polarity and structural factors

    M.A. Filatov, S. Karuthedath, P.M. Polestshuk, S. Callaghan, K.J. Flanagan, M. Telitchko, T. Wiesner, F. Laquai, M.O. Senge, 
    Phys. Chem. Chem. Phys. 2018, DOI: 10.1039/C7CP08472B
Boron dipyrromethene (BODIPY) dyes, Ultrafast pump-probe spectroscopy
  • High efficiency PCBM solar cells enabled by a spontaneously formed mesostructured CuSCN-nanowire heterointerface

    W.-Y. Sit, F. Eisner, Y.-H. Lin, Y. Firdaus, A. Seitkhan, A. Balawi, F. Laquai, C. Burgess, M.A. McLachlan, G. Volonakis, F. Giustino, and T.D. Anthopoulos, Adv. Sci. 2018, 10.1002/advs.201700980
copper (I) thiocyanate, fullerenes, mesostructured heterointerfaces, PCBM, solar cells
  • From Recombination Dynamics to Device Performance: Quantifying the Efficiency of Exciton Dissociation, Charge Separation, and Extraction in Bulk Heterojunction Solar Cells with Fluorine-Substituted Polymer Donors

    J. Gorenflot, A. Paulke, F. Piersimoni, J. Wolf, Z. Kan, F. Cruciani, A. El Labban, D. Neher, P.M. Beaujuge, F. Laquai.
    Adv. Energy Mater. 2018, DOI: 10.1002/ aenm.201701678
bulk heterojunction, charge generation yield, charge recombination yield, polymer solar cells, transient absorption spectroscopy
  • Efficiency-limiting Processes in Cyclopentadithiophene-bridged Donor-Acceptor-type Dyes for Solid-State Dye-sensitized Solar Cells

    F. Hinkel, Y. Kim, Y. Zagraniarsky, F. Schlütter, D. Andrienko, K. Müllen, F. Laquai
    J. Chem. Phys.148, 044703, 2018. 
Solar cells, Photochemistry, Photoconductivity, Chemical, compounds, Spectroscopy
  • Charge Carrier Generation, Recombination, and Extraction in Polymer:Fullerene Bulk Heterojunction Organic Solar Cells

    Laquai, F., Andrienko, D., Deibel, C., Neher, D, Advances in Polymer Science 272, Springer 2017, pp. 267-291​
Charge extraction, Charge generation, Charge recombination, Organic solar cells, PBT7, PBTTT, PCPDTBT
  • Polymer Main-Chain Substitution Effects on the Efficiency of Nonfullerene BHJ Solar Cells

    Y. Firdaus, L.P. Maffei, F. Cruciani, M.A. Müller, S. Liu, S. Lopatin, N. Wehbe, G.O.N. Ndwaja, A. Amassian, F. Laquai, P.M. Beaujuge. Adv. Energy Mater. 2017, 7, 1700834, DOI: 10.1002/aenm.201700834
3,4-difluorothiophene, benzo[1,2-b:4,5-b′]dithiophene (BDT), ITIC, nonfullerene acceptor, organic photovoltaics, polymer solar cells
  • Thieno[3,4-c]pyrrole-4,6-dione–based Polymer Acceptors for High Open-Circuit Voltage All-Polymer Solar Cells

    S. Liu, X. Song, S. Thomas, Z. Kan, F. Cruciano, F. Laquai, J.-L. Bredas, P.M. Beaujuge, Adv. Energy Mater. 2017, 7, 1602574
3,4-difluorothiophene; all-polymer solar cells; organic photovoltaics; polymer acceptors; thieno[3,4-c]pyrrole-4,6-dione
  • ​Solvent Vapor Annealing-Mediated Crystallization Directs Charge Generation, Recombination and Extraction in BHJ Solar Cells 

    M. Babics, R.-Z. Liang, K. Wang, F. Cruciani, Z. Kan, M. Wohlfahrt, M.-C. Tang, F. Laquai, and P.M. Beaujuge. Chem. Mater. 2017, DOI: 10.1021/acs.chemmater.7b04286​
Charge Generation, Recombination, Extraction, Solar Cells
  • Molecular Doping of the Hole-Transporting Layer for Efficient, Single-Step-Deposited Colloidal Quantum Dot Photovoltaics 

    A.R. Kirmani, F.P. Garcia De Arquer, J.Z. Fan, J.I. Khan, G. Walters, S. Hoogland, N. Wehbe, M.M. Said, S. Barlow, F. Laquai,
    E.H. Sargent, A. Amassian. ACS Energy Lett. 2017, 2 (9), 1952-1959, DOI: 10.1021/acsenergylett.7b00540
Molecular Doping, Quantum Dot Photovoltaics
  • Performance limitations in thieno[3,4-c]pyrrole-4,6-dione-based polymer:ITIC solar cells
    Fan Yang, Deping Qian, Ahmed Hesham Balawi, Yang Wu, Wei Ma, Frédéric Laquai, Zheng Tang, Fengling Zhang and Weiwei Li
    Phys. Chem. Chem. Phys., 2017,19, 23990-23998  
Voltage losses, Quantum Efficiency Losses, Thin Film Morphology
  • Improved Morphology and Efficiency of n–i–p Planar Perovskite Solar Cells by Processing with Glycol Ether Additives​
    Esma Ugur, Arif D. Sheikh†, Rahim Munir, Jafar I. Khan, Dounya Barrit, Aram Amassian, Frédéric Laquai

    ACS Energy Lett.20172, pp 1960–1968
Perovskite, Glycol Ether Additives, two-step proccess
  • Trap-Free Hot Carrier Relaxation in Lead–Halide Perovskite Films.
    Simon A. Bretschneider, Frédéric Laquai, and Mischa Bonn
    J. Phys. Chem. C, 2017, 121 (21), pp 11201–11206 
Lead-Halide, Perovskite, Hot carriers
  • Generation of Triplet Excited States via Photoinduced Electron Transfer in meso-anthra-BODIPY: Fluorogenic Response Towards Singlet Oxygen in Solution and in Vitro
    Mikhail A. Filatov, Safakath Karuthedath, Pavel M. Polestshuk, Huguette Savoie, Keith J. Flanagan, Cindy Sy, Elisabeth Sitte, Maxime Telitchko, Frédéric Laquai , Ross W. Boyle, Mathias O. Senge
    J. Am. Chem. Soc., 2017, 139 (18), pp 6282–6285 
Triplet Excited States, Photoinduced Electron Transfer
  • Programmable and coherent crystallization of semiconductors​
    Liyang Yu, Muhammad R. Niazi, Guy O. Ngongang Ndjawa, Ruipeng Li, Ahmad R. Kirmani, Rahim Munir, Ahmed H. Balawi, Frédéric Laquai and Aram Amassian Science Advances  03 Mar 2017: Vol. 3, no. 3, e1602462, DOI: 10.1126/sciadv.1602462
crystallizationpolycrystalline thin filmsamorphous thin filmssmall-molecule organic semiconductorsOrganic Electronicsorganic thin film transistorshomogeneous nucleationpatterningclassical nucleation theorynucleation and growth
  • Highly Efficient Electrocatalysts for Oxygen Reduction Reaction Based on 1D Ternary Doped Porous Carbons Derived from Carbon Nanotube Directed Conjugated Microporous Polymers

    Y. He, D. Gehrig, F. Zhang, C. Lu, C. Zhang, M. Cai, Y. Wang, F. Laquai, X. Zhuang, X. Feng,​ Adv. Funct. Mater. 2016, 26, 8255-8265.
Electrocatalysts, Carbon nanotube, Microporous polymers
  • Loss mechanisms in organic solar cells based on perylene diimide acceptors studied by time-resolved photoluminescence

    M. Gerhard, D. Gehrig, I.A. Howard, A.P. Arndt, M. Bilal, A. Rahimi-Iman, U. Lemmer, F. Laquai, M. Koch,
    Proceedings of SPIE - The International Society for Optical Engineering, Volume 9895, 2016, Article number 98950H
Organic solar cells, Time-resolved photoluminescence
  • Hybrid organic–inorganic inks flatten the energy landscape in colloidal quantum dot solids
    Mengxia Liu, Oleksandr Voznyy, Randy Sabatini, F. Pelayo García de Arquer, Rahim Munir, Ahmed Hesham Balawi, Xinzheng Lan, Fengjia Fan, Grant Walters, Ahmad R. Kirmani, Sjoerd Hoogland, Frédéric Laquai, Aram Amassian and Edward H. Sargent, 
    Nature Materials
Quantum Dots, Solar Cells, Bandtail,
Electron-transporting layers, ETM, organohalide, perovskite, solar cells, hydrophobic, cross-linked, Photothermal Deflection Spectroscopy, PDS
  • High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor
      S. Holliday, R. S.  Ashraf, A. Wadsworth, D. Baran, S. A. Yousaf, C. B. Nielsen, C.-H. Tan, S. D. Dimitrov, Z. Shang, N. Gasparini, M. Alamoudi, F. Laquai, C. J. Brabec, A. Salleo, J. R. Durrant & I. McCulloch, Nature Communications 7, Doi:10.1038/ncomms11585 
Solution-processed OPV, non-fullerene acceptor, fullerene-free P3HT
donor–acceptor–donor, naphthalene-diimide, J-aggregation
nonporous triazine, solid state synthetic
  • Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite

    Ilka M. Hermes, Simon A. Bretschneider, Victor W. Bergmann, Dan Li, Alexander Klasen, Julian Mars,Wolfgang Tremel, Frédéric Laquai, Hans-Jürgen Butt, Markus Mezger, Rüdiger Berger, Brian J. Rodriguez, and Stefan A. L. Weber​J. Phys. Chem. C2016120105724-5731, Doi.org/10.1021/acs.jpcc.5b11469​

perovskite, photovoltaic devices, piezoresponse force microscopy
MEH–PPV, nanocomposites
Small Molecule, Acceptors, OPV
  • Charge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends

    F. Laquai, D. Andrienko, R. Mauer, and P.W.M. Blom, Macromol. Rap. Comm. 2015, 36, 1001-1025.
Poly(3-hexylthiophene), Charge recombination, Charge transport, DFT calculations, Organic solar cells
  • J-aggregation, its impact on excited state dynamics and unique solvent effects on macroscopic assembly of a core-substituted naphthalenediimide

    H. Kar, D.W. Gehrig, F. Laquai, S. Ghosh,
    Nanoscale 2015, 7, 6729-6736.
Excited state dynamics, Transient absorption spectroscopy, Macroscopic
  • Conjugated Microporous Polymers with Dimensionality-Controlled Heterostructures for Green Energy Devices

    X. Zhuang, D. Gehrig, N. Forler, H. Liang, M. Wagner, M. R. Hansen, F. Laquai, F. Zhang, and X. Feng, Adv. Mater. 2015, 27, 3789-3796.
Porous polymers, Polymeric material, Fourier transform infrared (FTIR) spectra
  • Effect of Charge Transfer in Magnetic-Plasmonic Au@MOx (M = Mn, Fe) Heterodimers on the Kinetics of Nanocrystal Formation

    I. Schick, D. Gehrig, M. Montigny, B. Balke, M. Panthöfer, A. Henkel, F. Laquai, and W. Tremel, Chem. Mater. 2015, 27, 4877-4884.​
Heteronanoparticles, Nanomaterials, Heterodimer.
  • Interplay between singlet and triplet excited states in a conformationally locked donor-acceptor dyad

    M.A. Filatov, F. Etzold, D. Gehrig, F. Laquai, D. Busko, K. Landfester, S. Baluschev,
    Dalton Transactions 2015, 44, 19207 – 19217.
Steady-state, Time-resolved photoluminescence spectroscopy
  • A spiro-bifluorene based 3D electron acceptor with dicyanovinylene substitution for solution processed non-fullerene organic solar cells

    D. Xia, D. Gehrig, X. Guo, M. Baumgarten, F. Laquai, and K. Müllen
    J. Mater. Chem. A 2015, 3, 11086-11092. 
Electronic supplementary, Organic solar cells
  • Charge Carrier Generation Followed by Triplet State Formation, Annihilation, and Carrier Recreation in PBDTTT-C:PC60BM Photovoltaic Blends

    D. Gehrig, I.A. Howard, and F. Laquai
    J. Phys. Chem. C, 2015, 119 (24), pp 13509–13515
    DOI: 10.1021/acs.jpcc.5b03467
carrier dynamics, triplet state dynamics, polymer, PBDTTT-C/PC60
  • Photovoltaic polymer-fullerene blends: Terahertz carrier dynamics and device performance

    Z. Jin, D. Gehrig, C. Dyer-Smith, E.J. Heilweil, F. Laquai, M. Bonn, D. Turchinovich,
    Conference on Lasers and Electro-Optics Europe - Technical Digest, Volume 2015 - August, 10 August 2015, Article number 7183909. 
Terahertz spectroscopy, Ultrafast spectroscopy, Polymers
  • Photo-generated carriers lose energy during extraction from polymer-fullerene solar cells

    Armantas Melianas, Fabian Etzold, Tom J. Savenije, Frédéric Laquai, Olle Inganäs, Martijn Kemerink
    Nature Communications
    Article number:
Photo-generated Charges, Thermal Equilibrium, Thermalization, time-resolved optical spectroscopy
  • Triplet state formation in photovoltaic blends of DPP-type copolymers and PC71BM

    Ochsmann JR, Chandran D, Gehrig DW, Anwar H, Madathil PK, Lee KS, Frédéric Laquai 

    Macromol Rapid Commun. 2015 Jun;36(11):1122-8.

    DOI: 10.1002/marc.201400714​

DPP Polymers, Charge Generation, Organic Photovoltaics, Transient Absorption Spectroscopy, Triplet State Formation
  • The Impact of Donor–Acceptor Phase Separation on the Charge Carrier Dynamics in pBTTT:PCBM Photovoltaic Blends

    Dominik W. Gehrig, Ian A. Howard, Sean Sweetnam, Timothy M. Burke,Michael D. McGehee, Frédéric Laquai

    Macromol. Rapid Commun. 2015, 36, 1054−1060

    DOI: 10.1002/marc.201500112​ 

Carrier Dynamics, pBTTT, Phase Separation, Polymer Solar Cells, Transient Absorption Spectroscopy
  • ​Sub-ns triplet state formation by non-geminate recombination in PSBTBT:PC70BM and PCPDTBT:PC BM organic solar cells

    Fabian Etzold, Ian A. Howard, Nina Forler, Anton Melnyk, Denis Andrienko, Michael Ryan Hansen and Frédéric Laquai

    Energy Environ. Sci., 2015,8, 1511-152

    DOI: 10.1039/C4EE03630A​​​​

Solid-State Morphology, Charge Carrier Dynamics, Multivariate Curve Resolution, Transient Absorption Spectroscopy
  • Interplay Between Side Chain Pattern, Polymer Aggregation, and Charge Carrier Dynamics in PBDTTPD:PCBM Bulk-Heterojunction Solar Cells

    Clare Dyer-Smith, Ian A. Howard, Clément Cabanetos, Abdulrahman El Labban, Pierre M. Beaujuge, and Frédéric Laquai
    Advanced Energy Materials, Volume 5, Issue 9, (2015)
    DOI 10.1002/aenm.201401778
Charge Generation, PBDTTPD, Polymer Solar Cells, Structure–Property Relationships, Transient Absorption Spectroscopy
  • High open-circuit voltage small-molecule p-DTS(FBTTh2)2:ICBA bulk heterojunction solar cells – morphology, excited-state dynamics, and photovoltaic performance

    Aung Ko Ko Kyaw, Dominik Gehrig, Jie Zhang, Ye Huang, Guillermo C. Bazan, Frédéric Laquai, Thuc-Quyen Nguyen,
    J. Mater. Chem. A 2015, 3, 1530-1539​

Bulk Heterojunction, Solar Cells, Solution-Processable Small Molecule Donor, Transient Absorption Spectroscopy
  • All-round perovskites

    F. Laquai,
    Nat. Mater. 2014, 13, 429-430.
Amplified spontaneous emission, perovskites
  • Self-Assembly of Carboxylic Acid Appended Naphthalene Diimide Derivatives with Tunable Luminescent Color and Electrical Conductivity

    M.R. Molla, D. Gehrig, L. Roy, V. Kamm, A. Paul, F. Laquai, S. Ghosh, Chem. Eur. J. 2014, 20 (3), 760-771.
Aggregation, Chromophores, Hydrogen bonds, Luminescence, Self-assembly
  • Multifunctional Two-Photon Active Silica-Coated Au@MnO Janus Particles for Selective Dual Functionalization and Imaging

    I. Schick, S. Lorenz, D. Gehrig, A.-M. Schilmann, H. Bauer, M. Panthöfer, K. Fischer, D. Strand, F. Laquai, W. Tremel
    J. Am. Chem. Soc. 2014, 136 (6), 2473–2483.
powder X-ray diffraction, Au@MnO@SiO2
  • Tuning reductive and oxidative photoinduced electron transfer in amide linked anthraquinone-porphyrin-ferrocene architectures

    J. Melomedov, J. R. Ochsmann, M. Meister, F. Laquai, K. Heinze, Eur. J. Inorg. Chem. 2014, 2014, 11, 1984-2001.
Electron transfer, Density functional calculations, Substituent effects, Porphyrinoids, Quinones
  • Influence of triplet excitons on the lifetime of polymer-based organic light emitting diodes

    O. Pekkola, A. Gassmann, F. Etzold, F. Laquai and H. von Seggern,
    phys. stat. sol. (a) 2014, DOI: 10.1002/pssa.201330411.
Device lifetime, Excitons, Organic light-emitting diodes, Polymers
  • Aminoferrocene and Ferrocene Amino Acid as Electron Donors in Modular Porphyrin–Ferrocene and Porphyrin–Ferrocene–Porphyrin Conjugates

    J. Melomedov, J.R. Ochsmann, M. Meister, F. Laquai and K. Heinze,
    Eur. J. Inorg. Chem. 2014, 18, 2902-2915.
Artificial photosynthesis, Energy transfer, Electron transfer, Metallocenes, Porphyrins
  • A Heteroleptic Push-Pull Substituted Iron(II) Bis(tridentate) Complex with Low Energy Charge Transfer States

    A.K.C. Mengel, C. Förster, A. Breivogel, K. Mack, J.R. Ochsmann, F. Laquai, V. Ksenofontov, and Heinze,
     Chem. Eur. J. 2014, 21 (2), 704-714.​

Charge transfer, Excited states, Iron, Ligand field splitting, Tridentate ligands
  • Inorganic Janus particles for biomedical applications

    I. Schick, S. Lorenz, D. Gehrig, S. Tenzer, W. Storck, K. Fischer, D. Strand, F. Laquai, W. Tremel,
    Beilstein J. Nanotech. 2014, 5, 2346-2362

Bioimaging (CT, MRI, Multi-photon), Hetero-nanoparticles, Janus particles, Protein corona, Synthesis
  • Correlated Donor/Acceptor Crystal Orientation Controls Photocurrent Generation in All-Polymer Solar Cells
    M. Schubert, B. A. Collins, H. Mangold, I. A. Howard, W. Schindler, K. Vandewal, S. Roland, J. Behrends, F. Kraffert, R. Steyrleuthner, Z. Chen, K. Fostiropoulos, R. Bittl, A. Salleo, A. Facchetti, F. Laquai, H. W. Ade, and D. Neher,
    Adv. Funct. Mater. 2014, 24, 4068-4081.​​​
Polymer Solar Cells, X-ray
  • Nonequilibrium Charge Dynamics in Organic Solar Cells

    I.A. Howard, F. Etzold, F. Laquai, M. Kemerink,
     Adv. Energy Mater. 2014, 4, DOI: 10.1002/aenm.201301743.​ 
Charge Dynamics, Organic Solar Cells, Ultrafast transient spectroscopy
  • Modification of the Active Layer/PEDOT:PSS Interface by Solvent Additives Resulting in Improvement of Organic Solar Cells Performance

    O. Synooka, F. Kretschmer, M. Hager, M. Himmerlich, S. Krischok, D. Gehrig, F. Laquai, U. Schubert, G. Gobsch and H. Hoppe,
    ACS Applied Materials & Interfaces 2014, 6 (14), 11068-11081.
Additives, Copolymer, Dipole moment, Morphology, PEDOT:PSS, Solar cell
  • Bimolecular Crystals of Amorphous Polymer:PCBM Intercalated Structure for Improving PPV-based Organic Photovoltaic Cells

    K. Lim, J. Park, H. Mangold, F. Laquai, T. Choi, and T. Lee,
    ChemSusChem 2014, 8 (2), 337-344.
Absorption, Electron transfer, Polymers,Thin films, X-ray diffraction
  • Ultrafast Terahertz Photoconductivity of Photovoltaic Polymer-Fullerene Blends: A Comparative Study Correlated with Photovoltaic Device Performance

    Z. Jin, D. Gehrig, C. Dyer-Smith, E.J. Heilweil, F. Laquai, M. Bonn, D. Turchinovich,
    J. Phys. Chem. Lett. 2014, 5 (21), 3662-3668.
Charge transfer, Organic photovoltaics, Photoconductivity, Semiconducting polymers, Terahertz spectroscopy
  • Efficiency-Limiting Processes in Low-Bandgap Polymer:Perylene Diimide Photovoltaic Blends
    Dominik W. Gehrig, Steffen Roland, Ian A. Howard, Valentin Kamm, Hannah Mangold, Dieter Neher, and Frédéric Laquai
    J. Phys. Chem. C2014118 (35), pp 20077–20085
    DOI: 10.1021/jp503366m
Perylene Diimide, Charge Generation, Charge Recombination, Transient Absorption Spectroscopy
  • Control of charge generation and recombination in ternary polymer/polymer:fullerene photovoltaic blends using amorphous and semi-crystalline copolymers as donors

    Hannah Mangold, Artem A. Bakulin, Ian A. Howard, Christian Kästner, Daniel A. M. Egbe, Harald Hoppe and Frédéric Laquai

    Phys. Chem. Chem. Phys., 2014,16, 20329-20337

    DOI: 10.1039/C4CP01883D

Charge Generation, Charge Recombination, Charge-Transfer States, Geminate Recombination, Non-Geminate Recombination
  • The Effect of Solvent Additive on the Charge Generation and Photovoltaic Performance of a Solution-Processed Small Molecule: Perylene Diimide Bulk Heterojunction Solar Cell
    Alexander Sharenko, Dominik Gehrig, Frédéric Laquai and Thuc-Quyen Nguyen
    Chem. Mater., 2014, 26 (14), pp 4109–4118
    DOI: 10.1021/cm5010483
Small Molecule Donor, Perylene Diimide (PDI) Electron Acceptor, Organic Photovoltaic, Solvent Additives