Singlet exciton fission is the conversion of a single excited state in organic semiconductors into two excited states of lower energy. We investigate ways to use this process for higher solar cell efficiency.
Luis M Pazos-Outón, Monika Szumilo, Robin Lamboll, Johannes M Richter, Micaela Crespo-Quesada, Mojtaba Abdi-Jalebi, Harry J Beeson, Milan Vrućinić, Mejd Alsari, Henry J Snaith, Bruno Ehrler, Richard H Friend, Felix Deschler. Photon recycling in lead iodide perovskite solar cells Science 351 (6280), 1430-1433 (2016).
Perovskite semiconductors have recently shaken up the solar cell community because no other technology has ever seen such a fast increase in efficiency. We study the fundamental properties of these materials and devices thereof.
Demet Asil, Brian J Walker, Bruno Ehrler, Yana Vaynzof, Alessandro Sepe, Sam Bayliss, Aditya Sadhanala, Philip CY Chow, Paul E Hopkinson, Ullrich Steiner, Neil C Greenham, Richard H Friend. Role of PbSe structural stabilization in photovoltaic cells Advanced Functional Materials 25 (6), 928-935 (2015).
Quantum dots are highly tunable semiconductors with interesting properties. For example, their bandgap depends on their size, and they convert high-energy photons into multiple excitons. We study the physics of quantum dot solar cells.
We are always looking for talented Master students to join our group!
L.A. Muscarella, E.M. Hutter, S. Sanchez, C.D. Dieleman, T.J. Savenije, A. Hagfeldt, M. Saliba and B. Ehrler, Crystal Orientation and Grain Size: Do They Determine Optoelectronic Properties of MAPbI3 Perovskite?, J. Phys. Chem. Lett. 10, 6010-6018 (2019)
V.M. Caselli, M. Fischer, D. Meggiolaro, E. Mosconi, F. De Angelis, S.D. Stranks, A. Baumann, V. Dyakonov, E.M. Hutter and T.J. Savenije, Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Films, J. Phys. Chem. Lett. 10, 17: 5128-5134 (2019)
M. Futscher, J.M. Lee, L. McGovern, L.A. Muscarella, T. Wang, M.I. Haider, A. Fakharuddin, L. Schmidt-Mende and B. Ehrler, Quantification of Ion Migration in CH3NH3PbI3 Perovskite Solar Cells by Transient Capacitance Measurements, Mater. Horiz., (2019)
Tulus, S. Olthof, M. Marszalek, A. Peukert, L.A. Muscarella, B. Ehrler, O. Vukovic, Y. Galagan, S.C. Boehme and E. von Hauff, Control of Surface Defects in ZnO Nanorod Arrays with Thermally Deposited Au Nanoparticles for Perovskite Photovoltaics, ACS Appl.Energy Mater. 2, 5: 3736-3748 (2019)
L.A. Muscarella, D. Petrova, R. Jorge Cervasio, A. Farawar, O. Lugier, C. McLure, M.J. Slaman, J. Wang, B. Ehrler, E. von Hauff and R.M. Williams, Air-stable and oriented mixed lead halide perovskite (FA/MA) by one-step deposition method using zinc iodide and chloroamine additive, ACS Appl. Mater. Interfaces 11, 19: 17555-17562 (2019)
S.W. Tabernig, B. Daiber, T. Wang and B. Ehrler, Enhancing silicon solar cells with singlet fission: the case for Foerster resonant energy transfer using a quantum dot intermediate, J. Photonics Energy 8, 2, Article number: 022008: 1-12 (2018)
L. Song, T. Wang, V. Koerstgens, W.J. Wang, N. Saxena, C.J. Schaffer, T. Froeschl, N. Huesing, S. Bernstorff and P. Müller-Buschbaum, Wet Imprinting of Channel‐Type Superstructures in Nanostructured Titania Thin Films at Low Temperatures for Hybrid Solar Cells, ChemSusChem 11, 7: 1179-1186 (2018)