DataVXACS Energy LettersPaper
journal article·2026-07-08

Buried-Interface Engineering Enables Record Flexible Semitransparent Perovskite Solar Cells and 27.7% Flexible Perovskite/Silicon Four-Terminal Tandems

Chaofan Jiang, Hang Li, Minghao Li, Likai Zheng, Jin Huang, Yingchen Peng, Junjie Zhou, Ye Yang, Songling Huang, Chenyi Yi

ACS Energy Letters
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Source abstract

Abstract

Flexible semitransparent perovskite solar cells (FS-PSCs) are promising for lightweight PV and flexible tandem top cells, yet high efficiency and mechanical stability are hard to achieve simultaneously. Herein, we develop a buried-interface engineering strategy via neopentylammonium iodide (NPAI) modification on SnO 2 /perovskite together with a low-loss flexible IZO/Cu-grid electrode. NPAI reconstructs the buried interface, improves crystallinity, and suppresses nonradiative recombination. The optimized FS-PSCs achieve a champion efficiency of 21.4% and average 61.3% NIR transmittance (800−1200 nm), featuring outstanding operational stability over 500 h of maximum power point (MPP) tracking and 94.5% efficiency retention after 2000 bending cycles (10 mm radius). By integrating this semitransparent absorber, all-flexible perovskite/silicon four-terminal tandems reach a record 27.7% power conversion efficiency (PCE), setting a benchmark for flexible 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

State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering

Tsinghua University

Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering

Swiss Federal Institute of Technology Lausanne

Institute of Photoelectronic Thin Film Devices and Technology, State Key Laboratory of Photovoltaic Materials and Cells, Tianjin Key Laboratory of Efficient Solar Energy Utilization, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology

Nankai University

Jinneng Clean Energy Technology Co., Ltd

State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University

Funding

Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China

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