journal article·2021-08-25

Ti-Oxo Clusters with Peripheral Alkyl Groups as Cathode Interlayers for Efficient Organic Solar Cells

Xing Chen, Yingzi Han, Jie Fang, Zhou Zhang, Yuefeng Zhang, Chaowei Zhao, Dongdong Xia, Xiaona Dong, Chengyi Xiao, Yonggang Wu, Shengyong You, Weiwei Li

ACS Applied Materials & Interfaces· Volume 13· Issue 33
Publisher page

Abstract

Three independent Ti-oxo clusters (TOCs) that contain 6, 8, and 12 Ti atoms in the cores and alkyl groups on the surface were developed as cathode interlayers in bulk-heterojunction organic solar cells (OSCs). These TOCs have precise chemical structures with a single crystal, excellent solubility in methanol, and well-aligned work function. Smooth films can be facilely obtained by spin-casting their solution on top of the active layer. Therefore, they can be used as an interlayer in OSCs to provide a high power conversion efficiency (17.29%). Further studies reveal that these TOCs can not only reduce the work function of the silver electrode to provide better energy level alignment but also exhibit a significant n-doping effect with the non-fullerene acceptors to facilitate efficient electron extraction and transport. Our results demonstrate that TOCs as semiconductors have great potential application in OSCs.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang 330096, China

College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China

State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

Funding

Ministry of Science and Technology of the People's Republic of China · Jiangxi Provincial Department of Science and Technology · National Natural Science Foundation of China · Jiangxi Academy of Sciences · Open Project of State Key Laboratory of Supramolecular Structure and Materials · the Fundamental Research Funds for the Central Universities

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