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High‐Performance Planar‐Heterojunction Solar Cells Based on Ternary Halide Large‐Band‐Gap Perovskites
Author(s) -
Liang PoWei,
Chueh ChuChen,
Xin XuKai,
Zuo Fan,
Williams Spencer T.,
Liao ChienYi,
Jen Alex K.Y.
Publication year - 2015
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201400960
Subject(s) - materials science , heterojunction , crystallinity , perovskite (structure) , ternary operation , planar , band gap , optoelectronics , energy conversion efficiency , homogeneity (statistics) , halide , charge carrier , chemical engineering , inorganic chemistry , composite material , statistics , computer graphics (images) , mathematics , chemistry , computer science , engineering , programming language
High‐performance planar‐heterojunction (PHJ) solar cells based on large band‐gap (1.70–1.83 eV) perovskites are demonstrated. By incorporating Cl − into the MAPb(I 1‐Y Br Y ) 3 , the crystallinity and homogeneity of the solution‐processed perovskite thin films are much improved, which results in an increased charge carrier diffusion length from ≈160 nm to ≈700–800 nm. This enhancement leads to a high power conversion efficiency (PCE) of 10% in the low‐temperature solution‐processed PHJ devices.