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.
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.
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.
V.M. Caselli, Z. Wei, M.M. Ackermans, E.M. Hutter, B. Ehrler and T.J. Savenije, Charge Carrier Dynamics upon Sub-bandgap Excitation in Methylammonium Lead Iodide Thin Films: Effects of Urbach Tail, Deep Defects, and Two-Photon Absorption, ACS Energy Lett. 5, 12: 3821-3827 (2020)
L.A. Muscarella, E.M. Hutter, F. Wittmann, Y.W. Woo, Y.-K. Jung, L. McGovern, J. Versluis, A. Walsh, H.J. Bakker and B. Ehrler: Lattice compression increases the activation barrier for phase segregation in mixed-halide perovskites (Conference Presentation)In: nanoGe Conference Proceedings, nanoGe, 2020.
B. Daiber, S. Maiti, S.M. Ferro, J. Bodin, A. F. J. van den Boom, S.L. Luxembourg, S. Kinge, S.P. Pujari, H. Zuilhof, L.D.A. Siebbeles and B. Ehrler, Change in Tetracene Polymorphism Facilitates Triplet Transfer in Singlet Fission-Sensitized Silicon Solar Cells, J. Phys. Chem. Lett. 11, 20: 8703-8709 (2020)
L.A. Muscarella, E.M. Hutter, F. Wittmann, Y.W. Woo, Y.-K. Jung, L. McGovern, J. Versluis, A. Walsh, H.J. Bakker and B. Ehrler, Lattice Compression Increases the Activation Barrier for Phase Segregation in Mixed-Halide Perovskites, ACS Energy Lett. 5, 10: 3152-3158 (2020)
A.M. Alvertis, R. Pandya, L.A. Muscarella, N. Sawhney, M. Nguyen, B. Ehrler, A. Rao, R.H. Friend, A.W. Chin and B. Monserrat, Impact of exciton delocalization on exciton-vibration interactions in organic semiconductors, Phys. Rev. B 102, 8: 081122(R): 1-7 (2020)
L. McGovern, M.H. Futscher, L.A. Muscarella and B. Ehrler, Understanding the Stability of MAPbBr3 versus MAPbI3: Suppression of Methylammonium Migration and Reduction of Halide Migration, J. Phys. Chem. Lett. 11, 17: 7127-7132 (2020)