Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces

Photoinduced space-charges in organic optoelectronic devices, which are usually caused by poor mobility and charge injection imbalance, always limit the device performance. Here we demonstrate that photoinduced space-charge layers, accumulated at organic semiconductor-insulator interfaces, can also...

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Main Authors: Laigui Hu, Wei Jin, Rui Feng, Muhammad Zaheer, Qingmiao Nie, Guoping Chen, Zhi-Jun Qiu, Chunxiao Cong, Ran Liu
Format: Article
Language:English
Published: MDPI AG 2018-08-01
Series:Materials
Subjects:
Online Access:http://www.mdpi.com/1996-1944/11/9/1530
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spelling doaj-art-cac98ad09f5c48efa925497eec5dea842018-08-27T07:26:28ZengMDPI AGMaterials1996-19442018-08-01119153010.3390/ma11091530ma11091530Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor InterfacesLaigui Hu0Wei Jin1Rui Feng2Muhammad Zaheer3Qingmiao Nie4Guoping Chen5Zhi-Jun Qiu6Chunxiao Cong7Ran Liu8School of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaDepartment of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaSchool of Information Science and Technology, Fudan University, Shanghai 200433, ChinaPhotoinduced space-charges in organic optoelectronic devices, which are usually caused by poor mobility and charge injection imbalance, always limit the device performance. Here we demonstrate that photoinduced space-charge layers, accumulated at organic semiconductor-insulator interfaces, can also play a role for photocurrent generation. Photocurrent transients from organic devices, with insulator-semiconductor interfaces, were systematically studied by using the double-layer model with an equivalent circuit. Results indicated that the electric fields in photoinduced space-charge layers can be utilized for charge generation and can even induce a photovoltage reversal. Such an operational process of light harvesting would be promising for photoelectric conversion in organic devices.http://www.mdpi.com/1996-1944/11/9/1530organic semiconductororganic photodiodesorganic optoelectronic devicesspace-chargeinsulator layer
institution Open Data Bank
collection Open Access Journals
building Directory of Open Access Journals
language English
format Article
author Laigui Hu
Wei Jin
Rui Feng
Muhammad Zaheer
Qingmiao Nie
Guoping Chen
Zhi-Jun Qiu
Chunxiao Cong
Ran Liu
spellingShingle Laigui Hu
Wei Jin
Rui Feng
Muhammad Zaheer
Qingmiao Nie
Guoping Chen
Zhi-Jun Qiu
Chunxiao Cong
Ran Liu
Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
Materials
organic semiconductor
organic photodiodes
organic optoelectronic devices
space-charge
insulator layer
author_facet Laigui Hu
Wei Jin
Rui Feng
Muhammad Zaheer
Qingmiao Nie
Guoping Chen
Zhi-Jun Qiu
Chunxiao Cong
Ran Liu
author_sort Laigui Hu
title Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
title_short Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
title_full Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
title_fullStr Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
title_full_unstemmed Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces
title_sort photovoltage reversal in organic optoelectronic devices with insulator-semiconductor interfaces
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2018-08-01
description Photoinduced space-charges in organic optoelectronic devices, which are usually caused by poor mobility and charge injection imbalance, always limit the device performance. Here we demonstrate that photoinduced space-charge layers, accumulated at organic semiconductor-insulator interfaces, can also play a role for photocurrent generation. Photocurrent transients from organic devices, with insulator-semiconductor interfaces, were systematically studied by using the double-layer model with an equivalent circuit. Results indicated that the electric fields in photoinduced space-charge layers can be utilized for charge generation and can even induce a photovoltage reversal. Such an operational process of light harvesting would be promising for photoelectric conversion in organic devices.
topic organic semiconductor
organic photodiodes
organic optoelectronic devices
space-charge
insulator layer
url http://www.mdpi.com/1996-1944/11/9/1530
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