【研究發展處訊】

化學系林彥多助理教授發表最新期刊論文

Molecularly Engineered Cyclopenta[2,1-b;3,4-b’]dithiophene-based Hole Transporting Materials for High-performance Perovskite Solar Cells with Efficiency over 19%

作者：Yan-Duo Lin, Kun-Mu Lee, Sheng Hsiung Chang, Tsung-Yu Tsai, Hsin-Cheng Chung, Chien-Chun Chou, Heng-Yu Chen, Tahsin J. Chow, and Shih-Sheng Sun

ACS Applied Energy Materials (SCI)

卷期數：4

頁碼：4719-4728

出版日期：May 2021

Abstract

Three cyclopenta[2,1-b;3,4-b’]dithiophene (CPDT)- based organic semiconductors LYC-1-LYC-3 consisting of a central dithiolane ring with triarylamine-based side groups were prepared and utilized as hole-transporting materials (HTMs) in perovskite solar cells (PSCs). Physical studies on HTM LYC-1 indicated that it exhibits high efficiency in hole transfer and a strong hole-extraction tendency from the perovskite layer. The PSC device made with LYC-1 as HTM showed a remarkable performance of 19.07%, which is much higher than the device based on spiro-OMeTAD (17.90%) under a similar condition. Moreover, the hydrophobic nature of LYC-1 protects the perovskite layer effectively from moisture and, therefore, leads to its long-term stability, i.e., retains 85% of initial efficiency after operating over 1000 h. This work demonstrates that the incorporation of a dithiolane ring in the central CPDT core is an effective way of enhancing both efficiency and stability of PSC devices.

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