Achieving over 17% efficiency of ternary all-polymer solar cells with two well-compatible polymer acceptors

By Rui Sun, Wei Wang, Han Yu, Zeng Chen, Xinxin Xia, Hao Shen, Jing Guo, Mumin Shi, Yina Zheng, Yao Wu and 10 more. 2021

248 citations recorded by the source corpus.

Summary The field of all-polymer solar cells (all-PSCs) has experienced rapid development during the past few years, mainly driven by the design of efficient polymer acceptors (PAs). However, the polymer/polymer blend systems still lag far behind polymer/small molecule acceptor counterparts in power conversion efficiencies (PCEs). Here, we designed a near-infrared PA PY2F-T and paired it with polymer donor PM6 to fabricate all-PSCs with 15.0% PCE. Afterwards, PYT as the third component was introduced into the PM6:PY2F-T host system. Because of the complementary absorption bands and finely tuned microstructures of the ternary blend, the PCE is improved up to 17.2%, with the external quantum efficiency over 80% in visible and near-infrared spectral regions. Impressively, the ternary blend exhibited less energy loss, better light-soaking and photo-thermal stabilities than did the corresponding binary systems. This work promotes the development of high-performance ternary all-polymer systems and heralds a brighter future for accelerating the possible applications of all-PSCs.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/ae921b85d63672dd06ed97ac4b337ff3f40b32d2