journal article·2024-12-13

Exceeding 15% Performance with Energy Level Tuning in Tin-Based Perovskite Solar Cells

Liang Wang, Huan Bi, Jiaqi Liu, Yuyao Wei, Zheng Zhang, Mengmeng Chen, Ajay Kumar Baranwal, Gaurav Kapil, Takeshi Kitamura, Shuzhang Yang, Qingqing Miao, Qing Shen, Tingli Ma, Shuzi Hayase

ACS Energy Letters· Volume 9· Issue 12
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Abstract

Less-toxic tin-based perovskite materials have received more attention because they are a potential alternative to toxic Pb-based perovskite materials. However, the device performance of Sn-based perovskite solar cells is still far behind that of their Pb-based counterparts. In addition to easy oxidation of Sn 2+ and fast crystallization, energy level mismatch is the other important factor inhibiting the improvement of device performance. In the study, we synthesized a new material, 5-mercapto-1-methyltetrazole tin salt, SnT 2, as a regulator of the energy level of Sn-based perovskites. The results show that deeper valence bands and conduction bands were detected after SnT 2 addition, which can give a better energy level alignment. Furthermore, the introduction of SnT 2 also achieved the reduction of trap densities and enlargement of the grain size of perovskite films. Consequently, a 15.33% device performance was realized with an open-circuit voltage of 842.6 mV, short-circuit current density of 24.72 mA cm –2, and fill factor of 0.736.
Source: openalex_inverted_index · Quality: baseline

Research context

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

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

Affiliations

Info-Powered Energy System Research Center (i-PERC), The University of Electro-Communications, Tokyo 182-8585, Japan

State Key Laboratory of Photovoltaic Science and Technology, Department of Materials Science, Institute of Optoelectronics, Fudan University, Shanghai 200433, P. R. China

Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China

Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, P. R. China

Langfang Technological Centre of Green Industry, Langfang 065001, P. R. China

Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka 804-8550, Japan

Funding

JST-Mirai Program

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