Fecha de publicación: 20/01/2025 Fuente: Polymers Polymers, Vol. 17, Pages 248: Effects of Additional Flexible and Rigid Structure on BDT-BDD Terpolymer and the Performance of Organic Solar Cells
Polymers doi: 10.3390/polym17020248
Authors:
Xin Jing
Xuebing Li
Yong Zhao
Quanliang Wang
Xiao Kang
Xiaojie Liu
Aziz Saparbaev
Feng Li
Mingliang Sun

In organic solar cells, the aggregation and crystallization of polymers are significant for bulk heterojunction. Blending with acceptor materials, polymer donor materials can adjust their aggregation by the movement of the chain segments. In this paper, the unfused structures based on thiophene and carbazole are respectively designed and introduced into the donor-acceptor copolymer donor materials to investigate the influence of flexible and rigid structures on polymer-aggregation leading photoelectric performance. The material and quantum chemical property investigations show that the selection and design of the blocks are important for the properties of the terpolymers, and the resulting polymer:Y6 devices achieve improvements in performance from 13.85% to 15.66% (especially for fill factors from 63.37% up to 69.81%). This result contributes to designing and optimizing efficient polymers.