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.
C.D. Dieleman, W. Ding, L. Wu, N. Thakur, I. Bespalov, B. Daiber, Y. Ekinci, S. Castellanos and B. Ehrler, Universal Direct Pattering of Colloidal Quantum Dots by (Extreme) Ultraviolet and Electron Beam Lithography, Nanoscale 12, 20: 11306-11316 (2020)
B. Daiber, S.P. Pujari, S. Verboom, S.L. Luxembourg, S.W. Tabernig, M.H. Futscher, J. Lee, H. Zuilhof and B. Ehrler, A Method to detect triplet exciton transfer from singlet fission into silicon solar cells: comparing different surface treatments, J. Chem. Phys. 152, 114201: 1-8 (2020)
E.M. Hutter, T. Kirchartz, B. Ehrler, D. Cahen and E. von Hauff, Pitfalls and prospects of optical spectroscopy to characterize perovskite-transport layer interfaces, Appl. Phys. Lett. 116, 10: 100501: 1-8 (2020)
T.J. Savenije, D. Guo, V.M. Caselli and E.M. Hutter, Quantifying Charge‐Carrier Mobilities and Recombination Rates in Metal Halide Perovskites from Time‐Resolved Microwave Photoconductivity Measurements, Adv. Energy Mater., 1903788: 1-12 (2020)
M.H. Futscher, M.K. Gangishetty, D.N. Congreve and B. Ehrler, Quantifying mobile ions and electronic defects in perovskite-based devices with temperature-dependent capacitance measurements: Frequency vs time domain, J. Chem. Phys. 152, 4: 044202: 1-9 (2020)
M. Xiao, D. Shen, M.H. Futscher, B. Ehrler, K.P. Musselman, W. Duley and N.Y. Zhou, Threshold Switching in Single Metal‐Oxide Nanobelt Devices Emulating an Artificial Nociceptor, Adv.Electron.Mater. 6, 1: 1900595: 1-12 (2020)
M.A. Ruiz-Preciado, D.J. Kubicki, A. Hofstetter, L. McGovern, M.H. Futscher, A. Ummadisingu, Gershoni-Poranne, S.M. Zakeeruddin, B. Ehrler, L. Emsley, J.V. Milić and M. Grätzel, Supramolecular Modulation of Hybrid Perovskite Solar Cells via Bifunctional Halogen Bonding Revealed by Two-Dimensional 19F Solid-State NMR Spectroscopy, J. Am. Chem. Soc. 142, 3: 1645-1654 (2020)