Impact of Photoluminescence Reabsorption in Metal-Halide Perovskite Solar Cells
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Wang, Mingcong
Wang, Kai
Gao, Yajun
Khan, Jafar Iqbal
Yang, Wenchao
De Wolf, Stefaan

Laquai, Frédéric

KAUST Department
KAUST Solar Center (KSC)Physical Science and Engineering (PSE) Division
Material Science and Engineering Program
KAUST Grant Number
OSR-2018-CARF/CCF-3079Date
2021-03-26Submitted Date
2021-01-12Permanent link to this record
http://hdl.handle.net/10754/668186
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The precise quantification of the impact of photoluminescence reabsorption (PLr) in metal-halide perovskite solar cells (PSCs) has remained challenging. Here, the PLr effect is examined by combined time-resolved photoluminescence (TRPL) spectroscopy and time-resolved terahertz spectroscopy (TRTS) and a model is proposed which relates both the PLr and non-radiative recombination rate (k$_{nr}$) to the quasi-Fermi-level-splitting (QFLS). PLr is shown to be beneficial for the QFLS when k$_{nr}$ is below a critical value of ∽7×10$^5$ s$^{−1}$; at high k$_{nr}$ PLr is detrimental to the QFLS. By incorporating PLr into a two-diode model that allows extraction of the effective k$_{nr}$, the series resistance (r$_s$), and the shunt resistance (r$_{sh}$) in PSCs, we find that neglecting PLr overestimates the effective k$_{nr}$, while it does not affect the value of r$_s$ and r$_{sh}$. Our findings provide insight into the impact of the PLr effect on metal-halide PSCs.Citation
Wang, M., Wang, K., Gao, Y., Khan, J. I., Yang, W., De Wolf, S., & Laquai, F. (2021). Impact of Photoluminescence Reabsorption in Metal-Halide Perovskite Solar Cells. Solar RRL. doi:10.1002/solr.202100029Sponsors
This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079. M.W. and F.L. thank Denis Andrienko and Julien Gorenflot for fruitful discussions and comments on the work.Publisher
WileyJournal
Solar RRLAdditional Links
https://onlinelibrary.wiley.com/doi/10.1002/solr.202100029ae974a485f413a2113503eed53cd6c53
10.1002/solr.202100029