Safakath Karuthedath

Research Scientists



Al Kindi B5/L3 -3204-WS02

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, Y. Firdaus, A. Scaccabarozzi, T. D. Anthopoulos, F. Laquai Trace solvent additives enhance charge generation in layer-by-layer coated organic solar cells, Small Structures, 3, 4, 2100199  (2022) [].

  • I. Ramirez, A. Privitera, S. Karuthedath, A. Jungbluth, J. Benduhn, A. Sperlich, D. Spoltore, K. Vandewal, F. Laquai & M. Riede. The role of spin in the degradation of organic photovoltaics. Nature Communications 12, 471 (2021).
  • S. Karuthedath , J. Gorenflot , Y. Firdaus , N. Chaturvedi, C. S. P. De Castro , G. T. Harrison, J. I. Khan, A. Markina, A. H. Balawi, T. A. Dela Peña, W. Liu, R.-Z. Liang , A. Sharma, S. H. K. Paleti , W. Zhang, Y. Lin, E. Alarousu, D. H. Anjum , P. M. Beaujuge, S. De Wolf , I. McCulloch , T. D. Anthopoulos , D. Baran , D. Andrienko  and F. Laquai. Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells, Nature Materials, DOI: 10.1038/ s41563-020-00835-x (2020).
  • Y Firdaus, V M Le Corre, S Karuthedath, W Liu, A Markina, W Huang, S Chattopadhyay, M M Nahid, M I Nugraha, Y Lin, A Seitkhan, A Basu, W Zhang, I McCulloch, H Ade, J Labram, F Laquai, D Andrienko, L J A Koster, T D Anthopoulos. Long-range exciton diffusion in molecular non-fullerene acceptors Nature Communication 11 (2020)
  • 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.J. Phys. Chem. Lett. 2020, 11, 8, 2838–2845 (2020)
  • X. Jiang, J. Yang, S. Karuthedath, J. Li, W. Lai, C. Li, C. Xiao, L. Ye, Z. Ma, Z. Tang, F. Laquai, W. Li. Miscibility‐Controlled Phase Separation in Double‐Cable Conjugated Polymers for Single‐Component Organic Solar Cells with Efficiencies over 8%. Angewandte Chemie, DOI: DOI: 10.1002/anie.202009272 (2020)
  • 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. Kong 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, DOI: 10.1021/acsami.9b12833 (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, DOI: 10.1002/aenm.201901443 (2019)   
  • 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, Accepted, 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. DOI: 10.1002/solr.201800095 (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, 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). ​
  • M. Stephen, S. Karuthedath, T. Sauermann, K. Genevičius, G. Juška. Degradation effects on charge carrier transport in P3HT:PCBM solar cells studied by Photo-CELIV and ToF​, Proc. SPIE 9184, Organic Photovoltaics XV, 918424, (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

Research Interests Keywords

Organic Solar Cells Photophysics Ultrafast Laser Spectroscopy