Low-Temperature Crystallization Enables 21.9% Efficient Single-Crystal MAPbI3 Inverted Perovskite Solar Cells

Abdullah Yousef Alsalloum, Bekir Turedi, Xiaopeng Zheng, Somak Mitra, Ayan A. Zhumekenov, Kwangjae Lee, Partha Maity, Issam Gereige, Ahmed AlSaggaf, Iman S. Roqan, Omar F. Mohammed, Osman Bakr

Research output: Contribution to journalArticlepeer-review

Abstract

Lead halide perovskite solar cells (PSCs) have advanced rapidly in performance over the past decade. Single-crystal PSCs based on micrometers-thick grain-boundary-free films with long charge carrier diffusion lengths and enhanced light absorption (relative to polycrystalline films) have recently emerged as candidates for advancing PSCs further toward their theoretical limit. To date, the preferred method to grow MAPbI3 single-crystal films for PSCs involves solution processing at temperatures ≳120 °C, which adversely affects the films’ crystalline quality, especially at the surface, primarily because of methylammonium iodide loss at such high temperatures. Here we devise a solvent-engineering approach to reduce the crystallization temperature of MAPbI3 single-crystal films (
Original languageEnglish (US)
Pages (from-to)657-662
Number of pages6
JournalACS Energy Letters
DOIs
StatePublished - Jan 31 2020

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