Ultrafast Dynamics Group
Frédéric Laquai's Group


Safakath Karuthedath

Postdoctoral Fellows

Research Interests

Safakath’s research interests are ultrafast spectroscopy and degradation studies of conjugated polymers and organic small molecule based solar cells and thin films. He focuses on understanding photophysics of organic solar cells in order to improve efficiency and stability of organic photovoltaics.

Selected Publications

  • S. Karuthedath, J. Gorenflot, A. Melianas, Z. Kan, M. Kemerink, F. Laquai, Build-up of Triplet State Population in Operating TQ1:PC71BM Devices Does Not Limit Their Performance, The Journal of Physical Chemistry Letters, (2020).​
  •  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, S. Lu, Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in AllSmallMolecule Photovoltaics, Solar RRL, (2020).
  • ​H. Yin, C. Zhang, H. Hu, S. Karuthedath, Y. Gao, H. Tang, C. Yan, L. Cui, P. Fong, Z. Zhang, Y. Gao, J. Yang, Z. Xiao, L. Ding, F. Laquai, S. K. So, G. Li, Highly Crystalline Near-Infrared Acceptor Enabling Simultaneous Efficiency and Photostability Boosting in High-Performance Ternary Organic Solar Cells, ACS Applied Materials & Interfaces, (2019).​
  • S. Karuthedath, Y. Firdaus, R-Z. Liang, J. Gorenflot, P. M. Beaujuge, T. D. Anthopoulos, F. Laquai. Impact of Fullerene on the Photophysics of Ternary Small Molecule Organic Solar Cells. Advanced Energy Materials (2019),​DOI: 10.1002/aenm.201901443.   
  • S. Karuthedath, J. Gorenflot, Y. Firdaus, W-Y. Sit, F. Eisner, A. Seitkhan, M. K.Ravva, T. D. Anthopoulos, F. Laquai. Charge and Triplet Exciton Generation in Neat PC70BM Films and Hybrid CuSCN:PC70BM Solar Cells. Advanced Energy Materials​,1802476, DOI: 10.1002/aenm.201802476 (2018)
  • S. Karuthedath, A. Melianas, Z. Kan, V. Pranculis, M. Wohlfahrt, J.I. Khan, J. Gorenflot, Y. Xia, O. Inganäs, V. Gulbinas, M. Kemerink, F. Laquai. Thermal Annealing Reduces Geminate Recombination in TQ1:N2200 Based Organic Solar Cells, ​Journal of Materials Chemistry A, 6, 7428-7438 (2018)​.
  • A. Isakova, S. Karuthedath, T. Arnold, J. R. Howse, P. D. Topham,  D. T. W. Toolan, F. Laquai, L. Luer. Efficient Long - Range Electron Transfer Processes in Polyfluorene – Perylene Diimide Blends, Nanoscale (2018).
  • M. Filatov, S. Karuthedath, P. Polestshuk, S. Callaghan, K. Flanagan, T. Wiesner, F.Laquai, M. O Senge. BODIPY-Pyrene and Perylene Dyads as Heavy-Atom-Free Singlet Oxygen Sensitizers, ChemPhotoChem, 2, 1-11 (2018).
  • M. Filatov, S. Karuthedath, P. Polestshuk, H. Savoie, K. Flanagan, C. Sy, E.Sitte, M.Telitchko, F.Laquai, R. W Boyle, M. O Senge. Control of triplet state generation in heavy atom-free BODIPY-anthracene dyads by media polarity and structural factors, Physical Chemistry Chemical Physics, 20, 8016-8031 (2018)​.
  • Y​. Firdaus, A.Seitkhan, F. Eisner, W. Sit, Z. Kan, N. Wehbe, A. H. Balawi, E. Yengel, S. Karuthedath, F.Laquai, T. D. Anthopoulos. Charge photogeneration and recombination in mesostructured CuSCN-nanowire/PC70BM solar cells, Solar RRL (2018). DOI: 10.1002/solr.201800095.
  • M. Filatov, S. Karuthedath, P. Polestshuk, H. Savoie, K. Flanagan, C. Sy, E.Sitte, M.Telitchko, F.Laquai, R. W Boyle, M. O Senge, Generation of Triplet Excited States via Photoinduced Electron Transfer in meso-anthra-BODIPY: Fluorogenic Response Towards Singlet Oxygen in Solution and in Vitro, The Journal of the American Chemical Society, 139 (18), 6282–6285 (2017).​
  • S. Karuthedath, T. Sauermann, H-J. Egelhaaf, R. Wannemacher, C. J. Brabec, L. Lüer. The effect of oxygen induced degradation on charge carrier dynamics in P3HT: PCBM and Si-PCPDTBT: PCBM thin films and solar cells. Journal of Material Chemistry A, 3, 3399-3408, (2014). ​


  • P.hD. in Condensed Matter Physics, IMDEA Nanoscience,  Madrid, Spain and Universidad Autonema de Madrid (UAM), Spain​, 2015
  • M.Sc tech in Photonics, National Institute of Technology Calicut (NITC), Kerala, India, 2011
  • B.Sc in Physics, University of Calicut, Kerala, India, 2008