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Title: Experimental Demonstration of Correlated Flux Scaling in Photoconductivity and Photoluminescence of Lead-Halide Perovskites

Abstract

Lead-halide perovskites attract attention as materials for high-efficiency solar cells and light-emitting applications. Among their attributes are solution processability, high absorbance in the visible spectral range, and defect tolerance, as manifested in long photocarrier lifetimes and diffusion lengths. The microscopic origin of photophysical properties of perovskites is, however, still unclear and under debate. Here, we observe an interesting universal scaling behavior in a series of (hybrid and all-inorganic) perovskite single crystals investigated via simultaneous measurements of the Hall effect, photoconductivity, and photoluminescence. A clear correlation between photoconductivity and photoluminescence as functions of the incident photon flux is observed. While photoconductivity exhibits a crossover in the power-law dependence between power exponents 1 and 1/2, photoluminescence exhibits a crossover between power exponents 2 and 3/2. This correlation is found in all the studied compounds regardless of the cation type (organic or inorganic) or crystallographic phases. Furthermore, we propose phenomenological microscopic mechanisms that explain these interesting nontrivial power exponents and crossovers between them in this broad class of lead-halide perovskites.

Authors:
 [1];  [2];  [3];  [4];  [3];  [1]
+ Show Author Affiliations
  1. Rutgers Univ., Piscataway, NJ (United States)
  2. Rutgers Univ., Piscataway, NJ (United States); Micron.Inc, Boise, ID (United States)
  3. Columbia Univ., New York, NY (United States)
  4. Univ. of Texas at Dallas, Richardson, TX (United States)
Publication Date:
Research Org.:
Columbia Univ., New York, NY (United States); Univ. of Texas at Dallas, Richardson, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1611499
Alternate Identifier(s):
OSTI ID: 1481235
Grant/Contract Number:  
SC0010692; SC0010697; ER46980
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 10; Journal Issue: 5; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Physics; Carrier generation & recombination; Electrical conductivity; Photoconductivity; Perovskite; Photovoltaic absorbers; Semiconductor compounds; Solar cells; Photoluminescence

Citation Formats

Yi, Hee Taek, Irkhin, Pavel, Joshi, Prakriti P., Gartstein, Yuri N., Zhu, Xiaoyang, and Podzorov, Vitaly. Experimental Demonstration of Correlated Flux Scaling in Photoconductivity and Photoluminescence of Lead-Halide Perovskites. United States: N. p., 2018. Web. doi:10.1103/physrevapplied.10.054016.
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Yi, Hee Taek, Irkhin, Pavel, Joshi, Prakriti P., Gartstein, Yuri N., Zhu, Xiaoyang, & Podzorov, Vitaly. Experimental Demonstration of Correlated Flux Scaling in Photoconductivity and Photoluminescence of Lead-Halide Perovskites. United States. https://doi.org/10.1103/physrevapplied.10.054016
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Yi, Hee Taek, Irkhin, Pavel, Joshi, Prakriti P., Gartstein, Yuri N., Zhu, Xiaoyang, and Podzorov, Vitaly. Wed . "Experimental Demonstration of Correlated Flux Scaling in Photoconductivity and Photoluminescence of Lead-Halide Perovskites". United States. https://doi.org/10.1103/physrevapplied.10.054016. https://www.osti.gov/servlets/purl/1611499.
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@article{osti_1611499,
title = {Experimental Demonstration of Correlated Flux Scaling in Photoconductivity and Photoluminescence of Lead-Halide Perovskites},
author = {Yi, Hee Taek and Irkhin, Pavel and Joshi, Prakriti P. and Gartstein, Yuri N. and Zhu, Xiaoyang and Podzorov, Vitaly},
abstractNote = {Lead-halide perovskites attract attention as materials for high-efficiency solar cells and light-emitting applications. Among their attributes are solution processability, high absorbance in the visible spectral range, and defect tolerance, as manifested in long photocarrier lifetimes and diffusion lengths. The microscopic origin of photophysical properties of perovskites is, however, still unclear and under debate. Here, we observe an interesting universal scaling behavior in a series of (hybrid and all-inorganic) perovskite single crystals investigated via simultaneous measurements of the Hall effect, photoconductivity, and photoluminescence. A clear correlation between photoconductivity and photoluminescence as functions of the incident photon flux is observed. While photoconductivity exhibits a crossover in the power-law dependence between power exponents 1 and 1/2, photoluminescence exhibits a crossover between power exponents 2 and 3/2. This correlation is found in all the studied compounds regardless of the cation type (organic or inorganic) or crystallographic phases. Furthermore, we propose phenomenological microscopic mechanisms that explain these interesting nontrivial power exponents and crossovers between them in this broad class of lead-halide perovskites.},
doi = {10.1103/physrevapplied.10.054016},
journal = {Physical Review Applied},
number = 5,
volume = 10,
place = {United States},
year = {Wed Nov 07 00:00:00 EST 2018},
month = {Wed Nov 07 00:00:00 EST 2018}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1103/physrevapplied.10.054016
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