DataVXACS Applied Materials & InterfacesPaper
journal article·2026-05-20

Synergistic Bulk and Interfacial Defect Control Boosts Voltage and Efficiency in Perovskite/Silicon Tandem Solar Cells

Jianliang Wang, Fei Wang, Shuyi Lin, Pengxu Chen, Yuhui Ji, Zhenzhu Zhao, Yutao Wang, Shuangbiao Xia, Xuelin Yue, Haichuan Zhang, Shiying Sun, Junjun Li, Qi Liu, Jian Yu, Qin Hu, Hanlin Hu, Kexin Yao, Zhengxin Liu, Jun Yin, Chen Yang, Wenzhu Liu, Jiakai Liu

ACS Applied Materials & Interfaces· Volume 18· Issue 19
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Source abstract

Abstract

Open-circuit voltage ( V OC ) losses caused by defect-assisted recombination and interfacial energy misalignment in wide-bandgap perovskites remain a critical obstacle for high-efficiency perovskite/silicon tandem solar cells (PSTSCs). Here, we report a synergistic bulk-to-surface defect passivation strategy that simultaneously suppresses defect formation during the crystallization and optimizes the perovskite/C 60 interface. The incorporation of Dicyandiamide into the precursor significantly improves vacancy formation energies and enhances perovskite crystallinity, while subsequent surface treatment with ethane-1,2-diamine diacetate enables the concurrent passivation of cationic and anionic defects and induces favorable energy-level alignment. This coordinated defect management substantially reduces nonradiative recombination loss, yielding monolithic PSTSCs with a champion power conversion efficiency of 32.03% and a high open-circuit voltage of 1.95 V along with exceptional storage stability under ambient conditions. These results demonstrate that the integrated bulk and interfacial defect control is essential for approaching the voltage and efficiency limitation of the wide-bandgap perovskite top cells for tandem photovoltaics.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Silicon and Solar Cell Technologies · Chemical and Physical Properties of Materials

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

Affiliations

Research Center for Energy and Chemical Engineering

Xinjiang Technical Institute of Physics & Chemistry Chinese Academy of Sciences

University of Chinese Academy of Sciences

Shanghai Institute of Microsystem and Information Technology

Chinese Academy of Sciences

Department of Applied Physics, Research Center for Organic Electronics, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China

School of New Energy and Materials

Southwest Petroleum University

School of Microelectronics

University of Science and Technology of China

Department of Mathematics

Shanghai Normal University

Hoffmann Institute of Advanced Materials

Shenzhen Polytechnic University

School of Chemistry and Chemical Engineering, Institute of Advanced Inter-disciplinary Studies

Chongqing University

Funding

National Key Research and Development Program of China · Science and Technology Department of Xinjiang Uyghur Autonomous Region · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Shanghai Rising-Star Program · Chinese Academy of Sciences

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