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Title: Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High-Efficiency Organic Solar Cells

Abstract

The donor/acceptor interaction in non-fullerene organic photovoltaics leads to the mixing domain that dictates the morphology and electronic structure of the blended thin film. Initiative effort is paid to understand how these domain properties affect the device performances on high-efficiency PM6:Y6 blends. Different fullerenes acceptors are used to manipulate the feature of mixing domain. It is seen that a tight packing in the mixing region is critical, which could effectively enhance the hole transfer and lead to the enlarged and narrow electron density of state (DOS). As a result, short-circuit current (JSC) and fill factor (FF) are improved. The distribution of DOS and energy levels strongly influences open-circuit voltage (VOC). The raised filling state of electron Fermi level is seen to be key in determining device VOC. Energy disorder is found to be a key factor to energy loss, which is highly correlated with the intermolecular distance in the mixing region. A 17.53% efficiency is obtained for optimized ternary devices, which is the highest value for similar systems. The current results indicate that a delicate optimization of the mixing domain property is an effective route to improve the VOC, JSC, and FF simultaneously, which provides new guidelines for morphology controlmore » toward high-performance organic solar cells.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [1]; ORCiD logo [1]
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  1. Shanghai Jiao Tong Univ. (China)
  2. University of Chinese Academy of Sciences, Chongqing (China). Chongqing Institute of Green and Intelligent Technology
  3. Donghua Univ., Hangzhou (China)
  4. Zhejiang Univ., Hangzhou (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1981366
Grant/Contract Number:  
AC02-05CH11231; 2020YFB1505500; 2020YFB1505502; 51973110; 21734009; 21905102
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Science
Additional Journal Information:
Journal Volume: 9; Journal Issue: 6; Journal ID: ISSN 2198-3844
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; electronic structure; energy loss; morphology; organic solar cells; photophysical process

Citation Formats

Leng, Shifeng, Hao, Tianyu, Zhou, Guanqing, Zhu, Lei, Zhong, Wenkai, Yang, Yankang, Zhang, Ming, Xu, Jinqiu, Zhan, Junzhe, Zhou, Zichun, Chen, Jiajun, Lu, Shirong, Tang, Zheng, Shi, Zhiwen, Zhu, Haiming, Zhang, Yongming, and Liu, Feng. Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High-Efficiency Organic Solar Cells. United States: N. p., 2022. Web. doi:10.1002/advs.202104613.
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Leng, Shifeng, Hao, Tianyu, Zhou, Guanqing, Zhu, Lei, Zhong, Wenkai, Yang, Yankang, Zhang, Ming, Xu, Jinqiu, Zhan, Junzhe, Zhou, Zichun, Chen, Jiajun, Lu, Shirong, Tang, Zheng, Shi, Zhiwen, Zhu, Haiming, Zhang, Yongming, & Liu, Feng. Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High-Efficiency Organic Solar Cells. United States. https://doi.org/10.1002/advs.202104613
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Leng, Shifeng, Hao, Tianyu, Zhou, Guanqing, Zhu, Lei, Zhong, Wenkai, Yang, Yankang, Zhang, Ming, Xu, Jinqiu, Zhan, Junzhe, Zhou, Zichun, Chen, Jiajun, Lu, Shirong, Tang, Zheng, Shi, Zhiwen, Zhu, Haiming, Zhang, Yongming, and Liu, Feng. Wed . "Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High-Efficiency Organic Solar Cells". United States. https://doi.org/10.1002/advs.202104613. https://www.osti.gov/servlets/purl/1981366.
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@article{osti_1981366,
title = {Correlating Electronic Structure and Device Physics with Mixing Region Morphology in High-Efficiency Organic Solar Cells},
author = {Leng, Shifeng and Hao, Tianyu and Zhou, Guanqing and Zhu, Lei and Zhong, Wenkai and Yang, Yankang and Zhang, Ming and Xu, Jinqiu and Zhan, Junzhe and Zhou, Zichun and Chen, Jiajun and Lu, Shirong and Tang, Zheng and Shi, Zhiwen and Zhu, Haiming and Zhang, Yongming and Liu, Feng},
abstractNote = {The donor/acceptor interaction in non-fullerene organic photovoltaics leads to the mixing domain that dictates the morphology and electronic structure of the blended thin film. Initiative effort is paid to understand how these domain properties affect the device performances on high-efficiency PM6:Y6 blends. Different fullerenes acceptors are used to manipulate the feature of mixing domain. It is seen that a tight packing in the mixing region is critical, which could effectively enhance the hole transfer and lead to the enlarged and narrow electron density of state (DOS). As a result, short-circuit current (JSC) and fill factor (FF) are improved. The distribution of DOS and energy levels strongly influences open-circuit voltage (VOC). The raised filling state of electron Fermi level is seen to be key in determining device VOC. Energy disorder is found to be a key factor to energy loss, which is highly correlated with the intermolecular distance in the mixing region. A 17.53% efficiency is obtained for optimized ternary devices, which is the highest value for similar systems. The current results indicate that a delicate optimization of the mixing domain property is an effective route to improve the VOC, JSC, and FF simultaneously, which provides new guidelines for morphology control toward high-performance organic solar cells.},
doi = {10.1002/advs.202104613},
journal = {Advanced Science},
number = 6,
volume = 9,
place = {United States},
year = {Wed Jan 12 00:00:00 EST 2022},
month = {Wed Jan 12 00:00:00 EST 2022}
}
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https://doi.org/10.1002/advs.202104613
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