Iodide manipulation using zinc additives for efficient perovskite solar minimodules

Uddin, Md Aslam; Rana, Prem Jyoti Singh; Ni, Zhenyi; Yang, Guang; Li, Mingze; Wang, Mengru; Gu, Hangyu; Zhang, Hengkai; Dou, Benjia Dak; Huang, Jinsong

doi:10.1038/s41467-024-45649-6

Iodide manipulation using zinc additives for efficient perovskite solar minimodules

Journal Article · Wed Feb 14 00:00:00 EST 2024 · Nature Communications

DOI:https://doi.org/10.1038/s41467-024-45649-6· OSTI ID:2305423

; Rana, Prem Jyoti Singh; ; ; Li, Mingze; ; ; Zhang, Hengkai; Dou, Benjia Dak;

Abstract

Interstitial iodides are the most critical type of defects in perovskite solar cells that limits efficiency and stability. They can be generated during solution, film, and device processing, further accelerating degradation. Herein, we find that introducing a small amount of a zinc salt- zinc trifluoromethane sulfonate (Zn(OOSCF ₃ ) ₂ ) in the perovskite solution can control the iodide defects in resultant perovskites ink and films. CF ₃ SOO ^̶ vigorously suppresses molecular iodine formation in the perovskites by reducing it to iodide. At the same time, zinc cations can precipitate excess iodide by forming a Zn-Amine complex so that the iodide interstitials in the resultant perovskite films can be suppressed. The perovskite films using these additives show improved photoluminescence quantum efficiency and reduce deep trap density, despite zinc cations reducing the perovskite grain size and iodide interstitials. The zinc additives facilitate the formation of more uniform perovskite films on large-area substrates (78-108 cm ² ) in the blade-coating process. Fabricated minimodules show power conversion efficiencies of 19.60% and 19.21% with aperture areas of 84 and 108 cm ² , respectively, as certified by National Renewable Energy Laboratory (NREL), the highest efficiency certified for minimodules of these sizes.

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Research Organization:: CubicPV, Inc., Bedford, MA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0009529

OSTI ID:: 2305423

Alternate ID(s):: OSTI ID: 2471860

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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