Universal Approach for Managing Iodine Migration in Inverted Single-Junction and Tandem Perovskite Solar Cells

Universal Approach for Managing Iodine Migration in Inverted Single-Junction and Tandem Perovskite Solar Cells

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - (2024) vom: 18. Nov., Seite e2410779
1. Verfasser: Song, Zhenhua (VerfasserIn)
Weitere Verfasser: Sun, Kexuan, Meng, Yuanyuan, Zhu, Zewei, Wang, Yaohua, Zhang, Weifu, Bai, Yang, Lu, Xiaoyi, Tian, Ruijia, Liu, Chang, Ge, Ziyi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article halide migration iodide ion migration light stability operational stability perovskite solar cells
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Despite significant progress in the power-conversion efficiency (PCE) of perovskite solar cells (PSCs), the instability of devices remains a considerable obstacle for commercial applications. This instability primarily originates from the migration of halide ions-particularly iodide ions (I-). Under light exposure and thermal stress, I- migrates and transforms into I2, leading to irreversible degradation and performance loss. To address this issue, we introduced the additive 2,1,3-benzothiadiazole,5,6-difluoro-4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) (BT2F-2B) into the perovskite. The strong coordination between the unhybridized p orbital and lone-pair electrons from I- inhibits the deprotonation of MAI/FAI and the subsequent conversion of I- to I₂. The highly electronegative fluorine enhances its electrostatic interaction with I-. Consequently, the synergistic effect of BT2F-2B effectively suppresses the decomposition of perovskite and the defect density of the iodide vacancies. This approach delivers a PCE over 26% for inverted single-junction PSCs, with exceptional operational stability. According to the ISOS-L-3 testing protocol (maximum power point tracking at 85 °C and 50% relative humidity), treated PSCs retain 85% of their original PCE after 1000 h of aging. When the BT2F-2B is applied to a wide-bandgap (1.77 eV) perovskite system, the PCE of all-perovskite tandem solar cells reaches 27.8%, confirming the universality of the proposed strategy
Beschreibung:Date Revised 18.11.2024
published: Print-Electronic
Citation Status Publisher
ISSN:1521-4095
DOI:10.1002/adma.202410779