Fluorescent Conversion Agent Embedded in Zinc Oxide as an Electron‐Transporting Layer for High‐Performance Non‐Fullerene Organic Solar Cells with Improved Photostability

Author:

Chen Jinxiang1,Zhang Guichuan23ORCID,Chen Zhen4,Xiao Jingyang4,Xia Tian5,Li Xin4,Yip Hin‐Lap567ORCID

Affiliation:

1. School of Advanced Manufacturing Fuzhou University Quanzhou 362000 China

2. School of Semiconductor Science and Technology South China Normal University Foshan Guangdong 528225 China

3. Guangdong Provincial Key Laboratory of Chip and Integration Technology Guangzhou 510631 China

4. State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

5. Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong 999077 China

6. School of Energy and Environment City University of Hong Kong Kowloon Hong Kong 999077 China

7. Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon Hong Kong 999077 China

Abstract

AbstractZinc oxide (ZnO) is widely used as an electron transporting layer (ETL) for organic solar cells (OSCs). Here, a low‐cost commercial water/alcohol‐soluble fluorescent conversion agent, sodium 2,2′‐([1,1′‐biphenyl]−4,4′‐diyldivinylene)‐bis(benzenesulfonate) (CBS), is incorporated into ZnO to develop a novel organic‐inorganic hybrid ETL for high‐performance OSCs. The photoinduced charge transfer from CBS to ZnO significantly improves the charge transport properties of ZnO, resulting in faster electron extraction and reduced charge recombination in OSC devices with ZnO:CBS ETLs. ZnO:CBS‐based devices exhibit higher power conversion efficiencies (PCEs) than their pure ZnO‐based counterparts, especially in devices with a thicker ETL, which is more suitable for roll‐to‐roll and large‐area module processing. Furthermore, the strong ultraviolet‐light absorption capability of CBS inhibits the photodegradation of the active layer, improving the photostability of ZnO:CBS based OSC devices. Therefore, this work provides a simple and effective strategy for realizing high‐performance OSCs with high PCE and good photostability, which can further facilitate the commercialization of OSCs.

Funder

National Key Research and Development Program of China

Ministry of Science and Technology of the People's Republic of China

Basic and Applied Basic Research Foundation of Guangdong Province

China Postdoctoral Science Foundation

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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