Triple-halide wide-band gap perovskites with suppressed phase segregation for efficient tandems

Science
Jixian XuMichael D McGehee

Abstract

Wide-band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion efficiency (PCE) greater than 30% at low cost. However, wide-band gap perovskite solar cells have been fundamentally limited by photoinduced phase segregation and low open-circuit voltage. We report efficient 1.67-electron volt wide-band gap perovskite top cells using triple-halide alloys (chlorine, bromine, iodine) to tailor the band gap and stabilize the semiconductor under illumination. We show a factor of 2 increase in photocarrier lifetime and charge-carrier mobility that resulted from enhancing the solubility of chlorine by replacing some of the iodine with bromine to shrink the lattice parameter. We observed a suppression of light-induced phase segregation in films even at 100-sun illumination intensity and less than 4% degradation in semitransparent top cells after 1000 hours of maximum power point (MPP) operation at 60°C. By integrating these top cells with silicon bottom cells, we achieved a PCE of 27% in two-terminal monolithic tandems with an area of 1 square centimeter.

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Citations

Sep 11, 2020·Advanced Materials·Kyung Mun YeomSang Hyuk Im
Sep 11, 2020·Chemical Society Reviews·Nengxu LiHuanping Zhou
Oct 14, 2020·Advanced Materials·Yohan KoYongseok Jun
Oct 21, 2020·Nature Materials·Masaru Kuno
Oct 21, 2020·Nature Materials·Wenxin MaoUdo Bach
Nov 12, 2020·Physical Chemistry Chemical Physics : PCCP·Taketo HandaYoshihiko Kanemitsu
Nov 12, 2020·Advanced Materials·Taylor MootJoseph M Luther
Jan 8, 2021·Chemical Society Reviews·Ammarah KausarYue Zhang
Dec 29, 2020·Heliyon·Vítězslav Benda, Ladislava Černá
Jan 22, 2021·Accounts of Chemical Research·Prashant V Kamat, Masaru Kuno
Jan 9, 2021·Frontiers in Chemistry·Na LiuQi Chen
Mar 9, 2021·Chemical Communications : Chem Comm·Misato AkiyoshiMasahiro Rikukawa
Mar 11, 2021·The Journal of Physical Chemistry Letters·Jeffrey T DuBosePrashant V Kamat
Feb 24, 2021·Angewandte Chemie·Nathan R WolfHemamala I Karunadasa
Apr 1, 2021·The Journal of Physical Chemistry Letters·YuJia GuoJingjing Chang
Apr 21, 2020·Joule·Brandon R Sutherland
May 13, 2021·Nature Communications·Zehua ChenPeter A Bobbert
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Jun 11, 2021·Nature Communications·Andrew H ProppeEdward H Sargent
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Jul 22, 2020·ACS Applied Materials & Interfaces·Bairu LiShangfeng Yang

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