Ionic Site Competition Strategy Enhances Wide-Bandgap Perovskite Stability for Silicon-Based Tandem Photovoltaics

Youming Zhu; Baochao Zheng; Biao Li; Yu Tong; Weihua Ning; Yong Wang; Xuegong Yu; Deren Yang

doi:10.1021/acsenergylett.5c02408

journal article·2025-12-12

Ionic Site Competition Strategy Enhances Wide-Bandgap Perovskite Stability for Silicon-Based Tandem Photovoltaics

Youming Zhu, Baochao Zheng, Biao Li, Yu Tong, Weihua Ning, Yong Wang, Xuegong Yu, Deren Yang

ACS Energy Letters· Volume 10· Issue 12

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Source abstract

Abstract

Stable wide-bandgap (WBG) perovskites are essential for realizing efficient monolithic perovskite-silicon tandem devices, yet their intrinsic instability due to halide segregation remains a major challenge. Here, we report an ionic site competitive strategy to stabilize WBG perovskites by simultaneously eliminating bulk defects and maintaining halide homogeneity. By tailoring precursor chemistry using multiple chloride (Cl) ion sources with distinct bond energies, Cl – ions are guided into either lattice or interstitial positions. Lattice-incorporated Cl – ions suppress intrinsic lattice defects and enhance halide mixing, while interstitial Cl – ions relieve lattice strain induced by mixed halide compositions. The resulting perovskites exhibit significantly suppressed halide segregation, reduced nonradiative recombination, and improved optoelectronic quality. Finally, the WBG perovskite solar cell yields an efficiency of 23.88%, while the two-terminal perovskite-silicon tandem device reaches 32.39% efficiency with good operational stability, retaining over 90% of its initial efficiency after a 1000 h continuous test.

Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Thin-Film Transistor Technologies · solar cell performance optimization

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

Affiliations

College of Chemistry and Materials Science

Jinan University

State Key Laboratory of Silicon and Advanced Semiconductor Materials and School of Materials Science and Engineering, Hangzhou Global Scientific and Technological Innovation Center

Zhejiang University

Institute of Functional Nano & Soft Materials, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices

Soochow University

Funding

Suzhou Key Laboratory of Functional Nano and Soft Materials · Suzhou Municipal Science and Technology Bureau · Collaborative Innovation Center of Suzhou Nano Science and Technology · National Outstanding Youth Science Fund Project of National Natural Science Foundation of China · Westlake University · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Zhejiang University?Hangzhou Global Scientific and Technological Innovation Center · Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University

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