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Title: Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films

Abstract

The efficiency of perovskite solar cells is approaching that of single-crystalline silicon solar cells despite the presence of large grain boundary (GB) area in the polycrystalline thin films. Here, by using a combination of nanoscopic and macroscopic level measurements, we show that the ion migration in polycrystalline perovskites is dominated through GBs. Conducting atomic force microscopy measurements reveal much stronger hysteresis both for photocurrent and dark-current at the GBs than on the grains interiors, which can be explained by faster ion migration at the GBs. The dramatically enhanced ion migration results in a redistribution of ions along the GBs after electric poling, in contrast to the intact grain area. The perovskite single-crystal devices without GBs show negligible current hysteresis and no ion-migration signal. Furthermore, the discovery of dominating ion migration through GBs in perovskites can lead to broad applications in many types of devices including photovoltaics, memristors, and ion batteries.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
Publication Date:
Research Org.:
Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1342745
Grant/Contract Number:  
EE0006709
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 9; Journal Issue: 5; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 14 SOLAR ENERGY

Citation Formats

Shao, Yuchuan, Fang, Yanjun, Li, Tao, Wang, Qi, Dong, Qingfeng, Deng, Yehao, Yuan, Yongbo, Wei, Haotong, Wang, Meiyu, Gruverman, Alexei, Shield, Jeffery, and Huang, Jinsong. Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films. United States: N. p., 2016. Web. doi:10.1039/C6EE00413J.
Shao, Yuchuan, Fang, Yanjun, Li, Tao, Wang, Qi, Dong, Qingfeng, Deng, Yehao, Yuan, Yongbo, Wei, Haotong, Wang, Meiyu, Gruverman, Alexei, Shield, Jeffery, & Huang, Jinsong. Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films. United States. doi:10.1039/C6EE00413J.
Shao, Yuchuan, Fang, Yanjun, Li, Tao, Wang, Qi, Dong, Qingfeng, Deng, Yehao, Yuan, Yongbo, Wei, Haotong, Wang, Meiyu, Gruverman, Alexei, Shield, Jeffery, and Huang, Jinsong. Mon . "Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films". United States. doi:10.1039/C6EE00413J. https://www.osti.gov/servlets/purl/1342745.
@article{osti_1342745,
title = {Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films},
author = {Shao, Yuchuan and Fang, Yanjun and Li, Tao and Wang, Qi and Dong, Qingfeng and Deng, Yehao and Yuan, Yongbo and Wei, Haotong and Wang, Meiyu and Gruverman, Alexei and Shield, Jeffery and Huang, Jinsong},
abstractNote = {The efficiency of perovskite solar cells is approaching that of single-crystalline silicon solar cells despite the presence of large grain boundary (GB) area in the polycrystalline thin films. Here, by using a combination of nanoscopic and macroscopic level measurements, we show that the ion migration in polycrystalline perovskites is dominated through GBs. Conducting atomic force microscopy measurements reveal much stronger hysteresis both for photocurrent and dark-current at the GBs than on the grains interiors, which can be explained by faster ion migration at the GBs. The dramatically enhanced ion migration results in a redistribution of ions along the GBs after electric poling, in contrast to the intact grain area. The perovskite single-crystal devices without GBs show negligible current hysteresis and no ion-migration signal. Furthermore, the discovery of dominating ion migration through GBs in perovskites can lead to broad applications in many types of devices including photovoltaics, memristors, and ion batteries.},
doi = {10.1039/C6EE00413J},
journal = {Energy & Environmental Science},
number = 5,
volume = 9,
place = {United States},
year = {2016},
month = {3}
}

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    Works referencing / citing this record:

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