Achieving High‐Quality Wide Bandgap Perovskite Thin Films via Regulating the Halide Ion Exchange Order in Vapor‐Solid Reaction DOI Open Access

Wenjuan Xiong,

Shenghan Hu,

Yuanbo Song

et al.

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: March 9, 2025

Wide‐bandgap (WBG) perovskite films are vital for advancing high‐efficiency silicon/perovskite tandem technology. However, the performance of WBG produced using vapor deposition techniques often lags behind that solution‐based methods due to challenges in accurately controlling halide ions and crystallization quality, particularly Br/I ratio vapor‐deposited films. In this study, we investigated ion exchange (IE) process vapor‐solid reaction developed two producing CsFAPbI x Br 3− thin films: one involved reacting 3 FABr (I‐based IE perovskite), while other used CsFAPbBr FAI (Br‐based perovskite). Our findings demonstrate Br‐based exhibits superior quality lower defect density throughout process. As a result, approach has facilitated development solar cells with maximum power conversion efficiency 19.51%. Additionally, unencapsulated devices were able retain 88.9% their initial after being stored 1500 hr under atmospheric conditions (25°C, 18 ± 5% RH). This research provides novel strategy methodology fabricating high‐performance cell via vapor‐based techniques, which is crucial industrialization both cells.

Language: Английский

Perovskite Mini‐Module Voltage Loss Quantification and Analysis by Large‐Scale Hyperspectral Photoluminescence Imaging DOI Open Access
Alexandra Levtchenko, Pilar Lopez‐Varo, Marion Provost

et al.

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Perovskite‐based solar cells have been extensively studied by the scientific community over past decade and they are currently a very promising technology to be integrated into tandem perovskite module, for example, associated with silicon cells. However, one of challenges lies in upscaling production from small laboratory‐scale (<1 cm 2 ) larger modules. In this context, there is considerable interest extending analysis previously conducted on micrometer or millimeter scale scale. work, first time, full‐sample size hyperspectral absolutely calibrated photoluminescence (PL) imaging applied 16 semitransparent mini‐modules introduced. Herein, inhomogeneities PL emission observed between different investigated, highlighting shunt mechanisms ion migration effects, as well quantifying evaluating origins voltage losses. The impact these device performance stability also addressed.

Language: Английский

Citations

2
Achieving High‐Quality Wide Bandgap Perovskite Thin Films via Regulating the Halide Ion Exchange Order in Vapor‐Solid Reaction DOI Open Access

Wenjuan Xiong,

Shenghan Hu,

Yuanbo Song

et al.

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: March 9, 2025

Wide‐bandgap (WBG) perovskite films are vital for advancing high‐efficiency silicon/perovskite tandem technology. However, the performance of WBG produced using vapor deposition techniques often lags behind that solution‐based methods due to challenges in accurately controlling halide ions and crystallization quality, particularly Br/I ratio vapor‐deposited films. In this study, we investigated ion exchange (IE) process vapor‐solid reaction developed two producing CsFAPbI x Br 3− thin films: one involved reacting 3 FABr (I‐based IE perovskite), while other used CsFAPbBr FAI (Br‐based perovskite). Our findings demonstrate Br‐based exhibits superior quality lower defect density throughout process. As a result, approach has facilitated development solar cells with maximum power conversion efficiency 19.51%. Additionally, unencapsulated devices were able retain 88.9% their initial after being stored 1500 hr under atmospheric conditions (25°C, 18 ± 5% RH). This research provides novel strategy methodology fabricating high‐performance cell via vapor‐based techniques, which is crucial industrialization both cells.

Language: Английский

Citations

0