Structurally Compact Penta(N,N‐diphenylamino)corannulene as Dopant‐free Hole Transport Materials for Stable and Efficient Perovskite Solar Cells
Year: 2024
Type: article
Abstract: Hole transport materials (HTMs) are essential for improving the stability and efficiency of perovskite solar cells (PSCs). In this study, we have designed and synthesized a novel organic small molecule HTM, cor‐(DPA)5, characterized by a bowl‐shaped core with symmetric five diphenylamine groups. Compared to already‐known HTMs, the bowl‐shaped and relatively compact structure of cor‐(DPA)5 facilitates intermolecular π–π interactions, promotes film formations, and enhances charge transport. Consequently, the cor‐[DPA(2)]5 HTM exhibits high charge mobility, exceptional hydrophobicity, and a significantly elevated glass transition temperature. Superior to previously reported HTMs such as spiro‐OMeTAD and cor‐OMePTPA, our newly synthesized cor‐(DPA)5 HTM is free from any ionic dopants. As a result, the dopant‐free cor‐[DPA(2)]5‐based PSC demonstrates an impressive efficiency of 24.01 %, and exhibits outstanding operational stability. It retains 96 % after continuous exposure to 1 sun irradiation for 800 hours under MPP (maximum power point) tracking in ambient air. These findings present a structurally compact novel HTM and exemplify a new approach to the molecular design of HTM for the development of stable and effective PSCs.
Source: Angewandte Chemie
Authors: Xue‐Peng Zhang, Luyao Wang, Wen‐Xin Zhang, Zuo‐Chang Chen, Chunming Yang, Si‐Yi Xu, Peng Du, Bin‐Wen Chen, Qunyang He, Han‐Rui Tian, Xuejie Zhu, Meng Li, Shan‐Shan Wang, Lin‐Long Deng, Si‐Hao Chen, Qianyan Zhang, Su‐Yuan Xie, Lan‐Sun Zheng
Institutions: Xiamen University, Collaborative Innovation Center of Chemistry for Energy Materials, Chinese Academy of Sciences, Shanghai Advanced Research Institute, Shanghai Synchrotron Radiation Facility, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Henan University, Tan Kah Kee Innovation Laboratory
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4403538485