Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization

Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization

Summary: Additive engineering has become increasingly important for making high-quality perovskite solar cells (PSCs), with a recent example involving acid during fabrication of cesium-based perovskites. Lately, it has been suggested that this process would introduce dimethylammonium ((CH3)2NH2+, DM...

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Main Authors: Yunhe Pei, Yang Liu, Faming Li, Sai Bai, Xian Jian, Mingzhen Liu
Format: Article
Language:English
Published: Elsevier 2019-05-01
Series:iScience
Online Access:http://www.sciencedirect.com/science/article/pii/S258900421930121X
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spelling doaj-43e81c02d03c49f382493bca0f52fabf2020-11-25T02:01:16ZengElsevieriScience2589-00422019-05-0115165172Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability OptimizationYunhe Pei0Yang Liu1Faming Li2Sai Bai3Xian Jian4Mingzhen Liu5School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, P. R. ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, P. R. ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, P. R. ChinaDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping 58183, SwedenSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, P. R. ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China; Corresponding authorSummary: Additive engineering has become increasingly important for making high-quality perovskite solar cells (PSCs), with a recent example involving acid during fabrication of cesium-based perovskites. Lately, it has been suggested that this process would introduce dimethylammonium ((CH3)2NH2+, DMA+) through hydrolysis of the organic solvent. However, material composition of the hydrolyzed product and its effect on the device performance remain to be understood. Here, we present an in-depth investigation of the hydrolysis-derived material (i.e., DMAPbI3) and detailed analysis of its role in producing high-quality PSCs. By varying the ratio of CsI/DMAPbI3 in the precursor, we achieve high-quality CsxDMA1-xPbI3 perovskite films with uniform morphology, low density of trap states, and good stability, leading to optimized power conversion efficiency up to 14.3%, with over 85% of the initial efficiency retained after ∼20 days in air without encapsulation. Our findings offer new insights into producing high-quality Cs-based perovskite materials. : Energy Sustainability; Materials Characterization; Energy Materials Subject Areas: Energy Sustainability, Materials Characterization, Energy Materialshttp://www.sciencedirect.com/science/article/pii/S258900421930121X
collection DOAJ
language English
format Article
sources DOAJ
author Yunhe Pei
Yang Liu
Faming Li
Sai Bai
Xian Jian
Mingzhen Liu
spellingShingle Yunhe Pei
Yang Liu
Faming Li
Sai Bai
Xian Jian
Mingzhen Liu
Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
iScience
author_facet Yunhe Pei
Yang Liu
Faming Li
Sai Bai
Xian Jian
Mingzhen Liu
author_sort Yunhe Pei
title Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
title_short Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
title_full Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
title_fullStr Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
title_full_unstemmed Unveiling Property of Hydrolysis-Derived DMAPbI3 for Perovskite Devices: Composition Engineering, Defect Mitigation, and Stability Optimization
title_sort unveiling property of hydrolysis-derived dmapbi3 for perovskite devices: composition engineering, defect mitigation, and stability optimization
publisher Elsevier
series iScience
issn 2589-0042
publishDate 2019-05-01
description Summary: Additive engineering has become increasingly important for making high-quality perovskite solar cells (PSCs), with a recent example involving acid during fabrication of cesium-based perovskites. Lately, it has been suggested that this process would introduce dimethylammonium ((CH3)2NH2+, DMA+) through hydrolysis of the organic solvent. However, material composition of the hydrolyzed product and its effect on the device performance remain to be understood. Here, we present an in-depth investigation of the hydrolysis-derived material (i.e., DMAPbI3) and detailed analysis of its role in producing high-quality PSCs. By varying the ratio of CsI/DMAPbI3 in the precursor, we achieve high-quality CsxDMA1-xPbI3 perovskite films with uniform morphology, low density of trap states, and good stability, leading to optimized power conversion efficiency up to 14.3%, with over 85% of the initial efficiency retained after ∼20 days in air without encapsulation. Our findings offer new insights into producing high-quality Cs-based perovskite materials. : Energy Sustainability; Materials Characterization; Energy Materials Subject Areas: Energy Sustainability, Materials Characterization, Energy Materials
url http://www.sciencedirect.com/science/article/pii/S258900421930121X
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