Affiliation:
1. State Key Laboratory of Silicon and Advanced Semiconductor Materials Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China
2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low‐dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China
3. National Laboratory of Solid‐State Microstructures School of Physics, and Collaborative Innovation Centre for Advanced Microstructures Nanjing University Nanjing 210093 P. R. China
4. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
5. Zhejiang University‐Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311200 P. R. China
Abstract
AbstractThough encouraging performance is achieved in small‐area organic photovoltaics (OPVs), reducing efficiency loss when evoluted to large‐area modules is an important but unsolved issue. Considering that polymer materials show benefits in film‐forming processability and mechanical robustness, a high‐efficiency all‐polymer OPV module is demonstrated in this work. First, a ternary blend consisting of two polymer donors, PM6 and PBQx‐TCl, and one polymer acceptor, PY‐IT, is developed, with which triplet state recombination is suppressed for a reduced energy loss, thus allowing a higher voltage; and donor–acceptor miscibility is compromised for enhanced charge transport, thus resulting in improved photocurrent and fill factor; all these contribute to a champion efficiency of 19% for all‐polymer OPVs. Second, the delayed crystallization kinetics from solution to film solidification is achieved that gives a longer operation time window for optimized blend morphology in large‐area module, thus relieving the loss of fill factor and allowing a record efficiency of 16.26% on an upscaled module with an area of 19.3 cm2. Besides, this all‐polymer system also shows excellent mechanical stability. This work demonstrates that all‐polymer ternary systems are capable of solving the upscaled manufacturing issue, thereby enabling high‐efficiency OPV modules.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Fundamental Research Funds for Central Universities of the Central South University
Science and Technology Innovation 2025 Major Project of Ningbo
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science