Highly Efficient Organic Solar Cells Based on S,N-Heteroacene Non-Fullerene Acceptors

By Chuyi Huang, Xunfan Liao, Ke Gao, Lijian Zuo, Francis R. Lin, Xueliang Shi, Chang‐Zhi Li, Hongbin Liu, Xiaosong Li, Feng Liu and 3 more. Chemistry of Materials, 2018

189 citations recorded by the source corpus.

Two novel non-fullerene acceptors, SN6IC and SN6IC-4F, based on an S,N-heteroacene backbone were designed and synthesized. The cyclopentadiene fragments of commonly used acceptors were replaced with pyrrole rings to improve the electron-donating ability to increase the energy levels of the molecules. Both acceptors match well with the absorption and energy levels of the polymer donor PBDB-T, and PBDB-T:SN6IC-4F-based solar cells showed an excellent power conversion efficiency of 13.2%, with a relatively small VOC loss of 0.54 eV. This study proves that the introduction of a nitrogen atom to replace the sp3-hybridized carbon in the fused ring is very effective for making highly efficient NFAs to further improve the performance of organic solar cells.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/bbd1d2af4231084f0751478b3007abf5d2569fac