Issue 34, 2023

Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

Abstract

Bromide-based perovskites have large bandgaps, making them attractive for tandem solar cells developed to overcome the Shockley–Queisser limit. A perovskite solar cell architecture employs transporting layers to improve charge extraction and transport. Due to the wide variety of materials and preparation methods, it is critical to devise fast screening methods to rank transporting layers. Herein, we evaluate perovskite fluorescence quenching followed by time- and energy-resolved photoluminescence (TER-PL) and analyse the intensity dependence as a potential method to qualify charge-transporting layers rapidly. The capability of the technique was evaluated with TiO2/FAPbBr3 and SnO2/FAPbBr3, the most commonly used electron transporting layers, which were prepared using standard protocols to make best-performing devices. The results revealed that TiO2 is the most effective quencher due to the higher density of states in the conduction band, consistent with Marcus-Gerischer's theory. However, record-performance devices use SnO2 as the electron transport layer. This shows that the relationship between photoluminescence quenching and device performance is not bidirectional. Therefore, additional measurements like conductivity are also needed to provide reliable feedback for device performance.

Graphical abstract: Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

Supplementary files

Article information

Article type
Communication
Submitted
13 May 2023
Accepted
11 Aug 2023
First published
11 Aug 2023
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2023,25, 22607-22613

Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

X. Geng, Y. Liu, X. Zou, E. M. J. Johansson and J. Sá, Phys. Chem. Chem. Phys., 2023, 25, 22607 DOI: 10.1039/D3CP02190D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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