Efficient and moisture-resistant organic solar cells simultaneously reducing the surface defects and hydrophilicity of an electron transport layer

Organic solar cells (OSCs) simultaneously featuring good photovoltaic performance and strong humidity resistance are greatly anticipated for their practical application. Herein, we developed a simple organic trisiloxane molecule (denoted as TSi), and applied it to modify sol-gel ZnO (sg-ZnO) films....

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 9; no. 38; pp. 135 - 1358
Main Authors Gao, Xueman, Su, Zhenhuang, Qu, Shengchun, Zhang, Wenzhi, Gao, Yueyue, He, Shenghua, Wang, Zhijie, Shang, Luwen, Dong, Guohua, Yue, Gentian, Tan, Furui, Wang, Zhangguo
Format Journal Article
Published 07.10.2021
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Abstract Organic solar cells (OSCs) simultaneously featuring good photovoltaic performance and strong humidity resistance are greatly anticipated for their practical application. Herein, we developed a simple organic trisiloxane molecule (denoted as TSi), and applied it to modify sol-gel ZnO (sg-ZnO) films. Compared to pristine sg-ZnO films, the TSi/sg-ZnO film presents fewer surface defects, shallower work function, and stronger hydrophobicity. Benefiting from those improved characteristics, when adopting a benzodifuran (BDF)-based polymer (BDFP-Bz) and Y6 as the electron donor and acceptor to fabricate OSCs, the derived devices utilizing TSi/sg-ZnO as the electron transport layer (ETL) showed suppressed charge recombination, enhanced charge extraction and increased stability to moisture versus the devices based on an sg-ZnO ETL. Meanwhile, PBDFP-Bz:Y6 OSCs based on a TSi/sg-ZnO ETL delivered a higher PCE of 14.62% than that of the control devices (12.39%). More importantly, the TSi/sg-ZnO ETL was also applicable in other different photovoltaic systems, among which PM6:Y6 OSCs based on a TSi/sg-ZnO ETL yielded a superior PCE of 16.37% along with stronger stability to moisture versus the reference ones. Our finding demonstrates the TSi/sg-ZnO bilayer ETL holds promise in the practical application of OSCs for simultaneously improving the photovoltaic performance and moisture-resistance of devices. A novel low-cost TSi/ZnO bilayer electron transport layer was developed, which could simultaneously enhance the efficiency and device stability to moisture of derived OSCs.
AbstractList Organic solar cells (OSCs) simultaneously featuring good photovoltaic performance and strong humidity resistance are greatly anticipated for their practical application. Herein, we developed a simple organic trisiloxane molecule (denoted as TSi), and applied it to modify sol-gel ZnO (sg-ZnO) films. Compared to pristine sg-ZnO films, the TSi/sg-ZnO film presents fewer surface defects, shallower work function, and stronger hydrophobicity. Benefiting from those improved characteristics, when adopting a benzodifuran (BDF)-based polymer (BDFP-Bz) and Y6 as the electron donor and acceptor to fabricate OSCs, the derived devices utilizing TSi/sg-ZnO as the electron transport layer (ETL) showed suppressed charge recombination, enhanced charge extraction and increased stability to moisture versus the devices based on an sg-ZnO ETL. Meanwhile, PBDFP-Bz:Y6 OSCs based on a TSi/sg-ZnO ETL delivered a higher PCE of 14.62% than that of the control devices (12.39%). More importantly, the TSi/sg-ZnO ETL was also applicable in other different photovoltaic systems, among which PM6:Y6 OSCs based on a TSi/sg-ZnO ETL yielded a superior PCE of 16.37% along with stronger stability to moisture versus the reference ones. Our finding demonstrates the TSi/sg-ZnO bilayer ETL holds promise in the practical application of OSCs for simultaneously improving the photovoltaic performance and moisture-resistance of devices. A novel low-cost TSi/ZnO bilayer electron transport layer was developed, which could simultaneously enhance the efficiency and device stability to moisture of derived OSCs.
Author Gao, Yueyue
He, Shenghua
Dong, Guohua
Zhang, Wenzhi
Tan, Furui
Shang, Luwen
Yue, Gentian
Gao, Xueman
Wang, Zhijie
Su, Zhenhuang
Wang, Zhangguo
Qu, Shengchun
AuthorAffiliation Chinese Academy of Sciences
College of Chemistry and Chemical Engineering & Heilongjiang Industrial Hemp Processing Technology Innovation Center
Key Laboratory of Photovoltaic Materials
Key Laboratory of Semiconductor Materials Science, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Institute of Semiconductors
Qiqihar University
Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute
Henan University
AuthorAffiliation_xml – name: College of Chemistry and Chemical Engineering & Heilongjiang Industrial Hemp Processing Technology Innovation Center
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