Photoinduced Anion Segregation in Mixed Halide Perovskites

Brennan, Michael C.; Ruth, Anthony; Kamat, Prashant V.; Kuno, Masaru

doi:10.1016/j.trechm.2020.01.010

Photoinduced Anion Segregation in Mixed Halide Perovskites

Journal Article · Fri Mar 06 00:00:00 EST 2020 · Trends in Chemistry

DOI:https://doi.org/10.1016/j.trechm.2020.01.010· OSTI ID:1657794

^[1]; Ruth, Anthony ^[2]; ^[3]; ^[3]

Univ. of Notre Dame, IN (United States); Univ. Cattolica del Sacro Cuore, Brescia (Italy); University of Notre Dame
Hunt Perovskite Technologies, Dallas, TX (United States)
Univ. of Notre Dame, IN (United States)

Alloyed lead halide perovskites have taken a dominant role in the quest for third-generation solar cells. This is due to optimal light-harvesting properties, which can be tuned across the visible spectrum by mixing halide (X = Cl^–, Br^–, and I^–) anions and A⁺ cations (A⁺ = FA⁺, MA⁺, and Cs⁺). Durability issues related to ion movement within the perovskite lattice, however, impede large-scale commercialization. Uniformly mixed halide perovskites [e.g., APb(I_1–xBr_x)₃] reversibly segregate into narrow bandgap I-rich and wide bandgap Br-rich domains during continuous visible illumination. Subsequent I-rich domains reduce local open circuit voltages and decrease mixed halide perovskite solar cell power conversion efficiencies. In this review, we assess the known effects of halide segregation on the structural and optical properties of mixed halide materials, discuss ongoing research to suppress the phenomenon, and finally provide a mechanistic overview of its underlying origins.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Notre Dame, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: FC02-04ER15533; SC0014334

OSTI ID:: 1657794

Alternate ID(s):: OSTI ID: 1606287

Journal Information:: Trends in Chemistry, Journal Name: Trends in Chemistry Journal Issue: 4 Vol. 2; ISSN 2589-5974

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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