journal article·2024-09-25

Enhanced Performance and Stability of Perovskite Solar Cells Through Surface Modification with Benzocaine Hydrochloride

Zukang Chen, Shuguang Cao, Shizi Luo, Lavrenty G. Gutsev, Xiaoli Chen, Victoria V. Ozerova, Nikita A. Emelianov, Nikita A. Slesarenko, Valeria S. Bolshakova, Yupeng Zheng, Zhuoneng Bi, Sergey M. Aldoshin, Pavel A. Troshin, Bala R. Ramachandran, Gennady L. Gutsev, Hsien-Yi Hsu, Qifan Xue, Xueqing Xu

ACS Applied Materials & Interfaces· Volume 16· Issue 38
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Abstract

Current development of inverted p-i-n perovskite solar cells (PSCs), with nickel oxide as the hole transport layer, is progressing toward lower net costs, higher efficiencies, and superior stabilities. Unfortunately, the high density of defect-based traps on the surface of perovskite films significantly limits the photoelectric conversion efficiency and operational stability of perovskite solar cells. Finding cost-effective interface modifiers is crucial for the further commercial development of p-i-n PSCs. In the present work, we report a passivation strategy using a multifunctional molecule, benzocaine hydrochloride (BHC), which is shown to reduce defect density and enhance the photovoltaic performance and stability of the resultant p-i-n PSCs. It has been revealed that BHC strongly interacts with perovskite precursor components and triggers the evolution of the perovskite absorber film morphology and enables improved surface energy level alignment, thus promoting charge carrier transport and extraction. These properties are beneficial for improving open-circuit voltage ( V OC ) and fill factor (FF). Our results show that the photoelectric conversion efficiency (PCE) of p-i-n PSCs with nickel oxide as the hole transport layer increased from an initial 20.0% to 22.1% after being passivated with BHC, and these passivated devices also exhibited improved stability. DFT calculations reveal the unusual ability of the BHC passivant to improve band alignment while also preventing the accumulation of holes at the interface. In this work, the advantages of BHC passivation are demonstrated by linking theoretical calculations with optical and electrical characterizations.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications

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

Affiliations

Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Chinese Academy of Sciences, Guangzhou 510640, PR China

University of Science and Technology of China, Hefei 230026, PR China

Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCP MC RAS), Semenov Av. 1, Chernogolovka, Moscow Region 142432, Russia

Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States

Zhengzhou Research Institute of HIT, 26 Longyuan East 7th, Jinshui District, Zhengzhou, Henan Province 450000, PR China

Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States

School of Energy and Environment & Department of Materials Science and Engineering & Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong, Kowloon Tong 999077, PR China

Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, PR China

South China University of Technology, Guangzhou 510640, PR China

Funding

Science and Technology Planning Project of Guangdong Province · Russian Science Foundation · Basic and Applied Basic Research Foundation of Guangdong Province · Innovation and Technology Commission · Jiangsu Provincial Department of Science and Technology · Chinese Academy of Sciences · Dongguan City · Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences

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