journal article·2024-05-10

Phase-Stable Wide-Bandgap Perovskites with 2D/3D Structure for All-Perovskite Tandem Solar Cells

Jie Zhou, Tianyu Wen, Jinglin Sun, Zijin Shi, Can Zou, Zhichao Shen, Yawen Li, Yanbo Wang, Yuze Lin, Shuang Yang, Feng Liu, Zhibin Yang

ACS Energy Letters· Volume 9· Issue 5
Publisher page

Abstract

All-perovskite tandem solar cells have exhibited greater potential in achieving power conversion efficiencies that are higher than those of single-junction devices. However, commonly used I/Br mixed wide-bandgap (WBG) perovskites, as an important component in the tandem device, always show a photoinduced halide phase segregation, which results in a large open-circuit voltage deficit and low photostability of the final all-perovskite tandem solar cells. In this work, we successfully stabilized the phase of the WBG perovskite by constructing a 2D wrapped 3D structure via introducing larger organic cation 2-(4-fluorophenyl)ethylamine hydroiodide, which has a high activation energy of ion migration to suppress the halide phase segregation. The phase-stable WBG perovskite solar cells achieved a high open-circuit voltage of 1.35 V with a power conversion efficiency of 19.4% and retain 92.1% of their initial value after 500 h of AM1.5G illumination. Finally, the constructed all-perovskite tandem solar cells achieved a high efficiency of 27%.
Source: openalex_inverted_index · Quality: baseline

Research context

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

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

Affiliations

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China

Funding

National Key Research and Development Program of China · Science and Technology Commission of Shanghai Municipality · Shanghai Pilot Program for Basic Research

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