Suppressing Cation Migration in Triple-Cation Lead Halide Perovskites
Abstract
Ion migration represents an intrinsic instability of metal halide perovskite solar cells. Here we show that triple-cation FAxMAyCs1–x–yPbI3 [FA+ = (NH2)2CH+, MA+ = CH3NH3+] active layers with mixed orthorhombic, post-perovskite (δortho-CsPbI3), and cubic perovskite (α) phases (i.e., α/δ-phase FAxMAyCs1–x–yPbI3) exhibit improved cation stability against applied bias relative to pure α-phase perovskites (i.e., FA0.85Cs0.15PbI3 and...
Paper Details
Title
Suppressing Cation Migration in Triple-Cation Lead Halide Perovskites
Published Date
Aug 3, 2020
Journal
Volume
5
Issue
9
Pages
2802 - 2810
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