Issue 9, 2022

Enhanced performance and stability of low-bandgap mixed lead–tin halide perovskite photovoltaic solar cells and photodetectors via defect passivation with UiO-66-NH2 metal–organic frameworks and interfacial engineering

Abstract

Despite the remarkable progress in perovskite optoelectronic devices, the realization of high-performance and stable devices based on low-bandgap mixed lead (Pb)–tin (Sn) halide remains highly challenging. Here we present a promising strategy to improve the performance and stability of mixed lead–tin halide perovskite photovoltaics by using metal–organic frameworks (MOFs) as additives, including UiO-66 and UiO-66-NH2. Compared with UiO-66, the electron-donating amine group of UiO-66-NH2 can interact with under-coordinated metal cations in the perovskite crystals (i.e., Pb2+ or Sn2+), leading to efficient trap-state passivation and thus superior device performance. With interfacial engineering via molecular doping, the resultant devices exhibit a high-power conversion efficiency of 13.93% and substantially improved ambient stability. To the best of our knowledge, the device performance demonstrated herein represents the highest value ever reported for CH3NH3SnxPb1−xI3-based perovskite solar cells with an active area larger than 0.1 cm2. Importantly, this strategy is also applicable to perovskite photodetectors (PDs), delivering record-high performance for low-bandgap (≤1.3 eV) perovskite PDs. This work provides a new route to simultaneously improve the performance and stability of mixed Pb–Sn perovskite photovoltaics based on a facile strategy, which can accelerate perovskite-based optoelectronics toward future commercialization.

Graphical abstract: Enhanced performance and stability of low-bandgap mixed lead–tin halide perovskite photovoltaic solar cells and photodetectors via defect passivation with UiO-66-NH2 metal–organic frameworks and interfacial engineering

Supplementary files

Article information

Article type
Paper
Submitted
02 Mar 2022
Accepted
13 May 2022
First published
14 May 2022

Mol. Syst. Des. Eng., 2022,7, 1073-1084

Enhanced performance and stability of low-bandgap mixed lead–tin halide perovskite photovoltaic solar cells and photodetectors via defect passivation with UiO-66-NH2 metal–organic frameworks and interfacial engineering

C. Chang, K. Wu, C. Chang, R. Guo, G. Li and C. Wang, Mol. Syst. Des. Eng., 2022, 7, 1073 DOI: 10.1039/D2ME00032F

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