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Title: Light-Induced Anion Phase Segregation in Mixed Halide Perovskites

Abstract

Hybrid lead halide perovskites such as MAPbI 3 (MA = CH 3NH 3 +) and their mixed halide analogues represent an emerging class of materials for solar energy conversion. Intriguing aspects include sizable carrier diffusion lengths, large optical absorption coefficients, and certified power conversion efficiencies that now exceed 22%. Halide-composition-tunable band gaps also make MAPb(I 1–xBr x) 3 systems ideal candidates for tandem solar cells. Unfortunately, preventing the effective integration of MAPb(I 1–xBr x) 3 into working devices are intrinsic instabilities due to light-induced halide phase segregation. Namely, under illumination, mixed halide perovskites reversibly segregate into low-band-gap I-rich and high-band-gap Br-rich domains. Under electrical bias, halide migration has also been proposed as the source of undesirable charge injection barriers that degrade photovoltaic performance. In this Perspective, we review the origin of light-induced halide phase segregation, its effects on photovoltaic response, and ongoing research to suppress its influence on the optical and electronic response of mixed halide perovskites.

Authors:
; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Univ. of Notre Dame, Notre Dame, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1415052
Alternate Identifier(s):
OSTI ID: 1490041
Grant/Contract Number:  
FC02-04ER15533; SC0014334
Resource Type:
Published Article
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Name: ACS Energy Letters Journal Volume: 3 Journal Issue: 1; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Brennan, Michael C., Draguta, Sergiu, Kamat, Prashant V., and Kuno, Masaru. Light-Induced Anion Phase Segregation in Mixed Halide Perovskites. United States: N. p., 2017. Web. doi:10.1021/acsenergylett.7b01151.
Brennan, Michael C., Draguta, Sergiu, Kamat, Prashant V., & Kuno, Masaru. Light-Induced Anion Phase Segregation in Mixed Halide Perovskites. United States. doi:10.1021/acsenergylett.7b01151.
Brennan, Michael C., Draguta, Sergiu, Kamat, Prashant V., and Kuno, Masaru. Fri . "Light-Induced Anion Phase Segregation in Mixed Halide Perovskites". United States. doi:10.1021/acsenergylett.7b01151.
@article{osti_1415052,
title = {Light-Induced Anion Phase Segregation in Mixed Halide Perovskites},
author = {Brennan, Michael C. and Draguta, Sergiu and Kamat, Prashant V. and Kuno, Masaru},
abstractNote = {Hybrid lead halide perovskites such as MAPbI3 (MA = CH3NH3+) and their mixed halide analogues represent an emerging class of materials for solar energy conversion. Intriguing aspects include sizable carrier diffusion lengths, large optical absorption coefficients, and certified power conversion efficiencies that now exceed 22%. Halide-composition-tunable band gaps also make MAPb(I1–xBrx)3 systems ideal candidates for tandem solar cells. Unfortunately, preventing the effective integration of MAPb(I1–xBrx)3 into working devices are intrinsic instabilities due to light-induced halide phase segregation. Namely, under illumination, mixed halide perovskites reversibly segregate into low-band-gap I-rich and high-band-gap Br-rich domains. Under electrical bias, halide migration has also been proposed as the source of undesirable charge injection barriers that degrade photovoltaic performance. In this Perspective, we review the origin of light-induced halide phase segregation, its effects on photovoltaic response, and ongoing research to suppress its influence on the optical and electronic response of mixed halide perovskites.},
doi = {10.1021/acsenergylett.7b01151},
journal = {ACS Energy Letters},
number = 1,
volume = 3,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acsenergylett.7b01151

Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: Band gap energy (Eg;I/Br) vs x and (b) pseudocubic lattice parameter aI/Br and (200) peak position vs x for MAPb(I1−xBrx)3 (solid blue triangles), FAPb(I1−xBrx)3 (open orange triangles), and CsPb(I1−xBrx)3 (red circles). Fit lines come from equations in each plot where Eg;I/Br (aI/Br) is the band gap (lattice parameter)more » for given x. Literature FAPb(I1−xBrx)3, MAPb(I1−xBrx)3, and CsPb(I1−xBrx)3 data digitalized using WebplotDigitalizer.« less

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Works referencing / citing this record:

Mixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential
journal, June 2019

  • Islam, Md Jahidul; Yuyama, Ken-ichi; Takahashi, Kiyonori
  • NPG Asia Materials, Vol. 11, Issue 1
  • DOI: 10.1038/s41427-019-0131-0

Heterogeneity at multiple length scales in halide perovskite semiconductors
journal, July 2019

  • Tennyson, Elizabeth M.; Doherty, Tiarnan A. S.; Stranks, Samuel D.
  • Nature Reviews Materials, Vol. 4, Issue 9
  • DOI: 10.1038/s41578-019-0125-0

Mixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential
journal, June 2019

  • Islam, Md Jahidul; Yuyama, Ken-ichi; Takahashi, Kiyonori
  • NPG Asia Materials, Vol. 11, Issue 1
  • DOI: 10.1038/s41427-019-0131-0

Heterogeneity at multiple length scales in halide perovskite semiconductors
journal, July 2019

  • Tennyson, Elizabeth M.; Doherty, Tiarnan A. S.; Stranks, Samuel D.
  • Nature Reviews Materials, Vol. 4, Issue 9
  • DOI: 10.1038/s41578-019-0125-0

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.