La-Doped BaSnO₃ Electron Transport Layer for Perovskite Solar Cells

2018/08/15 by Chang Woo Myung, Myung, Chang Woo, Geunsik Lee +3
Engineering · Materials Science · #Advanced Materials and Semiconductor Technologies #Chemical and Physical Properties of Materials #FOS: Physical sciences #Ion-surface interactions and analysis #Materials Science (cond-mat.mtrl-sci)

paper · pdf · doi:10.48550/arxiv.1808.04979

openalex publication_date 2018/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Due to the photo-instability and hysteresis of TiO₂ electron transport layer (ETL) in perovskite solar cells (PSCs), novel electron transport materials are highly demanded. Here, we show ideal band alignment between La-doped BaSnO₃ (LBSO) and methyl ammonium (MA) lead iodide perovskite (MAPbI₃). The CH₃NH₃PbI₃/La_xBa_(1-x)SnO₃ interface forms a stable all-perovskite heterostructure. The selective band alignment is manipulated with band gap renormalization by La-doping on the Ba site. LBSO shows high mobility, photo-stability, and structural stability, promising the next generation ETL materials.

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