Methoxy substituents effect in triphenylamine dibenzofulvene based hole transporting materials for dopant free p-i-n perovskite solar cells
Yung-Chung Chen a b, Yan-Heng Li a, Chung-Lin Chung c, Hsiang-Lin Hsu c, Chih-Ping Chen c
a Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology
b Photo-SMART (Photo-sensitive Material Advanced Research and Technology Center), National Kaohsiung University of Science and Technology
c Department of Materials Engineering, Ming Chi University of Technology
Poster, Yung-Chung Chen, 066
Publication date: 14th October 2019

    Organic/inorganic hybrid perovskite solar cells (PSCs) are among the most promising photovoltaic technologies; with their low fabrication costs and high power conversion efficiencies (PCEs). They have great potential for use as alternatives to silicon-based solar cells. In this work, we discusses a series of triphenylamine dibenzofulvene–based hole transporting materials (HTMs) featuring different numbers of MeO groups (none for YC-1, four for YC-2, and six for YC-3) and their use in p–i–n perovskite solar cells (PSCs). We investigated the optoelectronic properties of these HTMs and found that the PSC devices incorporating YC-1 as HTMs exhibited power conversion efficiencies (PCEs) of 15.78 ± 0.61% which is outperformed the corresponding PEDOT:PSS–based device (12.80 ± 1.31%) under similar testing conditions. In addition, the stability of the YC-1–based cell was superior to that of the reference device. That is, the PCE remained at 97.3% of its original efficiency after approximately 1300 h, outperforming that (75.1%) of the PEDOT:PSS-based device. This study suggests a new approach for designing the high-performance stable p–i–n PSCs.

Ministry of Science and Technology, Taiwan (MOST) 108-2221-E-992-033

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