Balance Processing and Molecular Packing via Structural Disordering in a Random Terpolymer for Over 19% Efficiency Non-Halogenated Solvent Organic Solar Cells
Artikel i vetenskaplig tidskrift, 2025

Achieving commercial viability for organic solar cells (OSCs) requires non-toxic, non-halogenated solvent processing. However, poor solubility and suboptimal morphology of commonly used active layer materials have been limiting their non-halogenated solvent applications for high-performance OSCs. This study introduces a novel random terpolymer, PM7-TTz50, designed to overcome these challenges. By incorporating 50 mol% of a co-planar thiophene-thiazolothiazole (TTz) unit into the PM7 backbones, the resulting terpolymer achieves enhanced solubility in eco-friendly solvents. Furthermore, PM7-TTz50's strong aggregation tendency, coupled with high-boiling-point solvent processing—which prolongs aggregate/crystal growth—enhances molecular stacking and ordering. This approach supports efficient charge transport and minimizes non-radiative recombination, yielding power conversion efficiencies (PCEs) exceeding 19% and over 16% w/o solvent additives. Additionally, PM7-TTz50 demonstrates broad compatibility with various non-fullerene acceptors (NFAs), leading to enhanced material uniformity and reproducibility in device fabrication.

morphology

non-fullerene organic solar cells

non-halogenated solvent

random copolymerization

Författare

Jingnan Wu

Sino-Danish Center for Education and Research Denmark

Shandong University

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Aalborg Universitet

Fengbo Sun

Shandong University

Feng Hua

Shandong University

Wenwen Hou

Shandong University

Xinxin Xia

Shandong University

Xia Guo

Shandong University

Donghong Yu

Aalborg Universitet

Sino-Danish Center for Education and Research Denmark

Ergang Wang

Chalmers, Kemi och kemiteknik

Yongfang Li

Chinese Academy of Sciences

Maojie Zhang

Shandong University

Advanced Energy Materials

1614-6832 (ISSN) 1614-6840 (eISSN)

Vol. In Press

Ämneskategorier (SSIF 2025)

Materialkemi

Annan kemi

Den kondenserade materiens fysik

DOI

10.1002/aenm.202500024

Mer information

Senast uppdaterat

2025-03-24