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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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 |
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Laigui Hu Wei Jin Rui Feng Muhammad Zaheer Qingmiao Nie Guoping Chen Zhi-Jun Qiu Chunxiao Cong Ran Liu |
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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 |
_version_ |
1612670399288442880 |