Suppressing Nonradiative Recombination in Lead-Tin Perovskite Solar Cells through Bulk and Surface Passivation to Reduce Open Circuit Voltage Losses
Zhang K, Späth A, Almora O, Le Corre VM, Wortmann J, Zhang J, Xie Z, Barabash A, Hammer M, Heumüller T, Min J, Fink R, Lüer L, Li N, Brabec C (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Pages Range: 3235-3243
DOI: 10.1021/acsenergylett.2c01605
Abstract
Lead-Tin perovskite solar cells (Pb/Sn PSCs) are limited by the intrinsic instability of Sn(II), which tends to oxidize forming Sn vacancies in perovskite films. Herein, a Lewis base β-guanidinopropionic acid (GUA) and hydrazinium iodide (HAI) are introduced to effectively passivate the perovskite bulk and surface, respectively. The synergistic approach leads to Pb/Sn PSCs with a promising power conversion efficiency of 20.5% owing to the significantly reduced nonradiative recombination and voltage losses. As a result, the VOC × FF product of PSCs is significantly improved, which is among the highest values documented in the literature, being favorable for perovskite-based tandem applications. Additionally, the strategy demonstrated in this work could also improve the stability of PSCs by enhancing the chemical robustness of the perovskite layer. These results emphasize the significance of bulk and surface passivation in the development of efficient and stable PSCs based on Pb/Sn perovskites.
Authors with CRIS profile
Kaicheng Zhang
Institute Materials for Electronics and Energy Technology (i-MEET)
Andreas Späth
Lehrstuhl für Physikalische Chemie II
Vincent Marc Le Corre
Institute Materials for Electronics and Energy Technology (i-MEET)
Jonas Wortmann
Institute Materials for Electronics and Energy Technology (i-MEET)
Jiyun Zhang
Institute Materials for Electronics and Energy Technology (i-MEET)
Zhiqiang Xie
Institute Materials for Electronics and Energy Technology (i-MEET)
Anastasiia Barabash
Institute Materials for Electronics and Energy Technology (i-MEET)
Maria Hammer
Institute Materials for Electronics and Energy Technology (i-MEET)
Thomas Heumüller
Institute Materials for Electronics and Energy Technology (i-MEET)
Rainer Fink
Professur für Physikalische Chemie
Larry Lüer
Institute Materials for Electronics and Energy Technology (i-MEET)
Ning Li
Institute Materials for Electronics and Energy Technology (i-MEET)
Christoph Brabec
Institute Materials for Electronics and Energy Technology (i-MEET)
Additional Organisation(s)
Involved external institutions
Spain (ES)
China (CN)How to cite
APA:
Zhang, K., Späth, A., Almora, O., Le Corre, V.M., Wortmann, J., Zhang, J.,... Brabec, C. (2022). Suppressing Nonradiative Recombination in Lead-Tin Perovskite Solar Cells through Bulk and Surface Passivation to Reduce Open Circuit Voltage Losses. ACS Energy Letters, 3235-3243. https://dx.doi.org/10.1021/acsenergylett.2c01605
MLA:
Zhang, Kaicheng, et al. "Suppressing Nonradiative Recombination in Lead-Tin Perovskite Solar Cells through Bulk and Surface Passivation to Reduce Open Circuit Voltage Losses." ACS Energy Letters (2022): 3235-3243.
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