Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells

Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells

Although the performance of hybrid organic-inorganic perovskite solar cells (PSCs) is encouraging, the detailed working principles and mechanisms of PSCs remain to be further studied. In this work, an overshoot phenomenon of open-circuit voltage (<i>V<sub>oc</sub></i>) was ob...

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Main Authors: Chunhai Li, Longfeng Lv, Liang Qin, Lijie Zhu, Feng Teng, Zhidong Lou, Zhenbo Deng, Yufeng Hu, Qiuhong Cui, Yanbing Hou
Format: Article
Language:English
Published: MDPI AG 2018-11-01
Series:Materials
Subjects:
overshoot
transient photovoltage
perovskite solar cell
ionic migration
Online Access:https://www.mdpi.com/1996-1944/11/12/2407
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spelling doaj-b9f8aa6be0594f739fb8b9607d5feb742020-11-25T00:13:23ZengMDPI AGMaterials1996-19442018-11-011112240710.3390/ma11122407ma11122407Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar CellsChunhai Li0Longfeng Lv1Liang Qin2Lijie Zhu3Feng Teng4Zhidong Lou5Zhenbo Deng6Yufeng Hu7Qiuhong Cui8Yanbing Hou9Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing JiaoTong University, Beijing 100044, ChinaAlthough the performance of hybrid organic-inorganic perovskite solar cells (PSCs) is encouraging, the detailed working principles and mechanisms of PSCs remain to be further studied. In this work, an overshoot phenomenon of open-circuit voltage (<i>V<sub>oc</sub></i>) was observed when the illumination light pulse was switched off. The evolution of the <i>V<sub>oc</sub></i> overshoot was systematically investigated along with the intensity and the width of the light pulse, the background illumination, and pretreatment by different bias. Based on the experimental results, we could conclude that the <i>V<sub>oc</sub></i> overshoot originated from carrier motion against carrier collection direction, which happened at the ionic-accumulation-induced band bending areas near the interfaces between the perovskite active layer and the two carrier transport layers. The investigation on the <i>V<sub>oc</sub></i> overshoot can help us to better understand ionic migration, carrier accumulation, and recombination of PSCs under open-circuit conditions.https://www.mdpi.com/1996-1944/11/12/2407overshoottransient photovoltageperovskite solar cellionic migration
collection DOAJ
language English
format Article
sources DOAJ
author Chunhai Li
Longfeng Lv
Liang Qin
Lijie Zhu
Feng Teng
Zhidong Lou
Zhenbo Deng
Yufeng Hu
Qiuhong Cui
Yanbing Hou
spellingShingle Chunhai Li
Longfeng Lv
Liang Qin
Lijie Zhu
Feng Teng
Zhidong Lou
Zhenbo Deng
Yufeng Hu
Qiuhong Cui
Yanbing Hou
Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
Materials
overshoot
transient photovoltage
perovskite solar cell
ionic migration
author_facet Chunhai Li
Longfeng Lv
Liang Qin
Lijie Zhu
Feng Teng
Zhidong Lou
Zhenbo Deng
Yufeng Hu
Qiuhong Cui
Yanbing Hou
author_sort Chunhai Li
title Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
title_short Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
title_full Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
title_fullStr Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
title_full_unstemmed Investigation on the Overshoot of Transient Open-Circuit Voltage in Methylammonium Lead Iodide Perovskite Solar Cells
title_sort investigation on the overshoot of transient open-circuit voltage in methylammonium lead iodide perovskite solar cells
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2018-11-01
description Although the performance of hybrid organic-inorganic perovskite solar cells (PSCs) is encouraging, the detailed working principles and mechanisms of PSCs remain to be further studied. In this work, an overshoot phenomenon of open-circuit voltage (<i>V<sub>oc</sub></i>) was observed when the illumination light pulse was switched off. The evolution of the <i>V<sub>oc</sub></i> overshoot was systematically investigated along with the intensity and the width of the light pulse, the background illumination, and pretreatment by different bias. Based on the experimental results, we could conclude that the <i>V<sub>oc</sub></i> overshoot originated from carrier motion against carrier collection direction, which happened at the ionic-accumulation-induced band bending areas near the interfaces between the perovskite active layer and the two carrier transport layers. The investigation on the <i>V<sub>oc</sub></i> overshoot can help us to better understand ionic migration, carrier accumulation, and recombination of PSCs under open-circuit conditions.
topic overshoot
transient photovoltage
perovskite solar cell
ionic migration
url https://www.mdpi.com/1996-1944/11/12/2407
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