journal article·2023-05-10

Bifunctional Hole-Transport Materials with Modification and Passivation Effect for High-Performance Inverted Perovskite Solar Cells

Chuanyu Zhou, Xuehui Xu, Zhengxu Liu, Zhe Sun, Ziyin Chen, Xu Chen, Lei Chen, Xiang Fang, Jing Zhang, Yang Michael Yang, Xuguang Jia, Ningyi Yuan, Jianning Ding

ACS Applied Materials & Interfaces· Volume 15· Issue 18
Publisher page

Abstract

Hole-transport materials (HTMs) play an important role in perovskite solar cells (PSCs) to enhance the power conversion efficiency (PCE). The innovation of HTMs can increase the hole extraction ability and reduce interfacial recombination. Three organic small molecule HTMs with 4 H -cyclopenta[2,1- b:3,4- b ′]dithiophene (CPDT) as the central unit was designed and synthesized, namely, CPDTE-MTP (with the 2-ethylhexyl substituent and diphenylamine derivative end-group), CPDT-MTP (with the hexyl substituent and diphenylamine derivative end-group), and CPDT-PMTP (with the hexyl substituent and triphenylamine derivative end-group), which can form bifunctional and robust hole transport layer (HTL) on ITO and is tolerable to subsequent solvent and thermal processing. The X-ray photoelectron spectroscopy (XPS) results proved that CPDT-based HTMs can both interact with ITO through the nitrogen element in them and the tin element in ITO and passivate the upper perovskite layer. It is worth noting that the champion efficiency of MAPbI 3 PSCs based on CPDT-PMTP achieved 20.77%, with an open circuit voltage ( V OC ) of 1.10 V, a short-circuit current ( J SC ) of 23.39 mA cm –2, and a fill factor (FF) of 80.83%, as three new materials were introduced into p – i – n PSCs as dopant-free HTMs.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Conducting polymers and applications

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

Affiliations

School of Material Science & Engineering, National Experimental Demonstration Center for Materials Science and Engineering, Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou, Jiangsu 213164, China

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou, 310058 Zhejiang, China

Faculty of Engineering and Information Technology, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia

Funding

Jiangsu Provincial Department of Education · Natural Science Foundation of Jiangsu Province · Changzhou Science and Technology Bureau · State Key Laboratory of Photovoltaic Science and Technology · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Top-notch Academic Programs Project of Jiangsu Higher Education Institutions · Key Research and Development project of Quzhou

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