Dual Liquid Rubber Matrix Based Highly Efficient and Mechanically Robust Layer-by-Layer Organic Solar Cells
Artikel i vetenskaplig tidskrift, 2025

Developing organic solar cells (OSCs) simultaneously possessing high efficiency and robust mechanical properties is one of crucial tasks to ensure their operational reliability and applicability for emerging wearable devices. However, enhancing their mechanical properties without compromising the electrical properties of high-performance active materials remains a challenge. This work presents a method that overcomes this limitation by embedding a dual liquid rubber (DLR) matrix consisting of tetra-fluorophenyl azide and penta-fluorophenyl end-capped polybutadienes, PFFA and PFF, into layer-by-layer (LBL) films, which enables by a finely controlled film morphology built on strong noncovalent interactions and azide cross-linking chemistry. The resulting LBL film demonstrates a significantly improved stretchability and reduced stiffness of the active layer, with a crack initiation strain that is approximately eight times higher than that of pristine film. The potential of the DLR strategy is demonstrated in PM6:L8-BO flexible solar cells with a power conversion efficiency of 17.7%, which is among the highest efficiencies for flexible OSCs to date. More importantly, the DLR strategy also enables significant bending durability of flexible LBL OSCs that retain 84.2% of their initial performance after 5000 bending cycles. This design concept offers a new strategy for achieving highly efficient and stretchable LBL OSCs.

robust mechanical

liquid rubber matrix

flexible organic solar cell

cross-linking

Författare

Yuchen Liao

Jianghan University

Huimin Xiang

Jianghan University

Tianyu Hu

Jianghan University

Aziz Saparbaev

National University of Uzbekistan named after Mirzo Ulugbek

Xufan Zheng

Jianghan University

Ming Wan

Jianghan University

Jingnan Wu

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Yating Xie

Jianghan University

Shiqi Hu

Jianghan University

Qi Xiao

Jianghan University

Biao Xiao

Jianghan University

Ergang Wang

Chalmers, Kemi och kemiteknik

Xunchang Wang

Jianghan University

Renqiang Yang

Jianghan University

SUSMAT

2766-8479 (ISSN) 2692-4552 (eISSN)

Vol. In Press

Ämneskategorier (SSIF 2025)

Materialkemi

Polymerkemi

Annan kemi

DOI

10.1002/sus2.70005

Mer information

Senast uppdaterat

2025-03-25