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Title: Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells

Abstract

We report the profiling of spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. The trap densities in single crystals varied by five orders of magnitude, with a lowest value of 2 × 10 11 per cubic centimeter and most of the deep traps located at crystal surfaces. The charge trap densities of all depths of the interfaces of the polycrystalline films were one to two orders of magnitude greater than that of the film interior, and the trap density at the film interior was still two to three orders of magnitude greater than that in high-quality single crystals. Suprisingly, after surface passivation, most deep traps were detected near the interface of perovskites and hole transport layers, where a large density of nanocrystals were embedded, limiting the efficiency of solar cells.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [3]
  1. Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC 27599, USA.
  2. Department of Mechanical and Materials Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska–Lincoln, Lincoln, NE 68588, USA.
  3. Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC 27599, USA., Department of Mechanical and Materials Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska–Lincoln, Lincoln, NE 68588, USA.
  4. School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA.
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1605511
Grant/Contract Number:  
EE0008749
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 367 Journal Issue: 6484; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Ni, Zhenyi, Bao, Chunxiong, Liu, Ye, Jiang, Qi, Wu, Wu-Qiang, Chen, Shangshang, Dai, Xuezeng, Chen, Bo, Hartweg, Barry, Yu, Zhengshan, Holman, Zachary, and Huang, Jinsong. Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells. United States: N. p., 2020. Web. doi:10.1126/science.aba0893.
Ni, Zhenyi, Bao, Chunxiong, Liu, Ye, Jiang, Qi, Wu, Wu-Qiang, Chen, Shangshang, Dai, Xuezeng, Chen, Bo, Hartweg, Barry, Yu, Zhengshan, Holman, Zachary, & Huang, Jinsong. Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells. United States. doi:10.1126/science.aba0893.
Ni, Zhenyi, Bao, Chunxiong, Liu, Ye, Jiang, Qi, Wu, Wu-Qiang, Chen, Shangshang, Dai, Xuezeng, Chen, Bo, Hartweg, Barry, Yu, Zhengshan, Holman, Zachary, and Huang, Jinsong. Thu . "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells". United States. doi:10.1126/science.aba0893.
@article{osti_1605511,
title = {Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells},
author = {Ni, Zhenyi and Bao, Chunxiong and Liu, Ye and Jiang, Qi and Wu, Wu-Qiang and Chen, Shangshang and Dai, Xuezeng and Chen, Bo and Hartweg, Barry and Yu, Zhengshan and Holman, Zachary and Huang, Jinsong},
abstractNote = {We report the profiling of spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. The trap densities in single crystals varied by five orders of magnitude, with a lowest value of 2 × 10 11 per cubic centimeter and most of the deep traps located at crystal surfaces. The charge trap densities of all depths of the interfaces of the polycrystalline films were one to two orders of magnitude greater than that of the film interior, and the trap density at the film interior was still two to three orders of magnitude greater than that in high-quality single crystals. Suprisingly, after surface passivation, most deep traps were detected near the interface of perovskites and hole transport layers, where a large density of nanocrystals were embedded, limiting the efficiency of solar cells.},
doi = {10.1126/science.aba0893},
journal = {Science},
number = 6484,
volume = 367,
place = {United States},
year = {2020},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aba0893

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