Modulation of Electron Transport Layers To Minimize Voltage Loss in CsSnI₃ Perovskite Solar Cells

Haixuan Yu; Lijuan Fu; Tianyu Sun; Deyu Wang; Zhirong Liu; Junyi Huang; Zhiguo Zhang; Xiaoting Ma; Xiongjie Li; Bing Hu; Muqing Chen; Shangfeng Yang; Yan Shen; Mingkui Wang

doi:10.1021/acsenergylett.5c01128

journal article·2025-06-13

Modulation of Electron Transport Layers To Minimize Voltage Loss in CsSnI₃ Perovskite Solar Cells

Haixuan Yu, Lijuan Fu, Tianyu Sun, Deyu Wang, Zhirong Liu, Junyi Huang, Zhiguo Zhang, Xiaoting Ma, Xiongjie Li, Bing Hu, Muqing Chen, Shangfeng Yang, Yan Shen, Mingkui Wang

ACS Energy Letters· Volume 10· Issue 6

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Source abstract

Abstract

The efficiency of tin-based perovskite solar cells, particularly the inorganic CsSnI 3, remains far below that of lead-based counterparts due to the substantial voltage loss at the charge transport layer-perovskite interface. Systematic research shows that the voltage loss in the CsSnI 3 perovskite planar solar cells is mainly due to the reduction in the splitting of the quasi-Fermi energy level and the increase in the energy band bending at the electron transport layer (ETL)-perovskite interface. In this study, we propose the fullerene derivative tetramethylcyclobutadiene-C 60 (TMCB), which has the high lowest unoccupied molecular orbital energy level, as an ETL for CsSnI 3 perovskite planar solar cells to minimize voltage losses. The TMCB ETL has been demonstrated to facilitate CsSnI 3 -based perovskite solar cells to achieve a remarkable power conversion efficiency of 14.95% with a high open circuit voltage of 0.81 V measured under AM 1.5G irradiation.

Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Conducting polymers and applications

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

Affiliations

Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, P. R. China

Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials & Technology

Jianghan University

Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Materials Science and Engineering

University of Science and Technology of China

Optics Valley Laboratory

Funding

National Key Research and Development Program of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Optics Valley Laboratory · Hubei Province

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