Surface Modulation via Conjugated Bithiophene Ammonium Salt for Efficient Inverted Perovskite Solar Cells

The metal halide perovskite absorbers are prone to surface defects, which severely limit the power conversion efficiencies (PCEs) and the operational stability of the perovskite solar cells (PSCs). Herein, trace amounts of bithiophene propylammonium iodide (bi-TPAI) are applied to modulate the surfa...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2023-10, Vol.15 (40), p.46803-46811
Main Authors: Zhang, Xin, Eurelings, Stijn, Bracesco, Andrea, Song, Wenya, Lenaers, Stijn, Van Gompel, Wouter, Krishna, Anurag, Aernouts, Tom, Lutsen, Laurence, Vanderzande, Dirk, Creatore, Mariadriana, Zhan, Yiqiang, Kuang, Yinghuan, Poortmans, Jef
Format: Article
Language:English
Subjects:
Energy, Environmental, and Catalysis Applications
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Summary:The metal halide perovskite absorbers are prone to surface defects, which severely limit the power conversion efficiencies (PCEs) and the operational stability of the perovskite solar cells (PSCs). Herein, trace amounts of bithiophene propylammonium iodide (bi-TPAI) are applied to modulate the surface properties of the gas-quenched perovskite. It is found that the bi-TPAI surface treatment has negligible impact on the perovskite morphology, but it can induce a defect passivation effect and facilitate the charge carrier extraction, contributing to the gain in the open-circuit voltage (V oc) and fill factor. As a result, the PCE of the gas-quenched sputtered NiO x -based inverted PSCs is enhanced from the initial 20.0% to 22.0%. Most importantly, the bi-TPAI treatment can largely alleviate or even eliminate the burn-in process during the maximum power point tracking measurement, improving the operational stability of the devices.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.3c08119