Macromers for Encapsulating Perovskite Photovoltaics and Achieving High Stability

Macromers for Encapsulating Perovskite Photovoltaics and Achieving High Stability

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 25 vom: 21. Juni, Seite e2400218
1. Verfasser: Tang, Xiaohua (VerfasserIn)
Weitere Verfasser: Zhang, Tianjiao, Chen, Weijie, Chen, Haiyang, Zhang, Zhichao, Chen, Xining, Gu, Hao, Kang, Shuaiqing, Han, Chuanshuai, Xu, Tingting, Cao, Jianlei, Zheng, Jialei, Ou, Xuemei, Li, Yaowen, Li, Yongfang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article blanket encapsulation (BE) degradation mechanisms macromers moisture stability perovskite solar cells
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Perovskite solar cells (pero-SCs) are highly unstable even under trace water. Although the blanket encapsulation (BE) strategy applied in the industry can effectively block moisture invasion, the commercial UV-curable adhesives (UVCAs) for BE still trigger power conversion efficiency deterioration, and the degradation mechanism remains unknown. For the first time, the functions of commercial UVCAs are revealed in BE-processed pero-SCs, where the small-sized monomer easily permeates to the perovskite surface, forming an insulating barrier to block charge extraction, while the high-polarity moiety can destroy perovskite lattice. To solve these problems, a macromer, named PIBA is carefully designed, by grafting two acrylate terminal groups on the highly gastight polyisobutylene and realizes an increased molecular diameter as well as avoided high-polarity groups. The PIBA macromer can stabilize on pero-SCs and then sufficiently crosslink, forming a compact and stable network under UV light without sacrificing device performance during the BE process. The resultant BE devices show negligible efficiency loss after storage at 85% relative humidity for 2000 h. More importantly, these devices can even reach ISO 20653:2013 Degrees of protection IPX7 standard when immersed in one-meter-deep water. This BE strategy shows good universality in enhancing the moisture stability of pero-SCs, irrespective of the perovskite composition or device structure
Beschreibung:Date Revised 20.07.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202400218