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Title: Effect of perovskite thickness on electroluminescence and solar cell conversion efficiency
Authors: Rai, Monika
Wong, Lydia Helena
Etgar, Lioz
Keywords: Engineering::Materials
Issue Date: 2020
Source: Rai, M., Wong, L. H., & Etgar, L. (2020). Effect of perovskite thickness on electroluminescence and solar cell conversion efficiency. Journal of Physical Chemistry Letters, 11(19), 8189–8194. doi:10.1021/acs.jpclett.0c02363
Journal: Journal of Physical Chemistry Letters 
Abstract: A hybrid organic−inorganic perovskite in a diode structure can lead to multifunctional device phenomena exhibiting both a high power conversion efficiency (PCE) of a solar cell and strong electroluminescence (EL) efficiency. Nonradiative losses in such multifunctional devices lead to an open circuit voltage (Voc) deficit, which is a limiting factor for pushing the efficiency toward the Shockley−Queisser limit. In this work, we analyze and quantify the radiative limit of Voc in a perovskite solar cell as a function of its absorber thickness. We correlate PCE and EL efficiency at varying thicknesses to understand the limiting factors for a high Voc. With a certain increase in perovskite thickness, PCE improves but EL efficiency is compromised and vice versa. Thus, correlating these two figures of merit of a solar cell guides the light management strategy together with minimizing nonradiative losses. The results demonstrate that maximizing absorption and emission processes remains paramount for optimizing devices.
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.0c02363
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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