浙江大学李昌治团队近日开发了一类简单的非稠环电子受体，可用于高效有机光伏中。2021年4月2日出版的《德国应用化学》发表了这项成果。

在该研究中，团队从单个芳香性单位开始，通过两步合成开发了两种非稠环电子受体，即PTB4F和PTB4Cl. 为这类非稠环受体引入二维链和卤代末端在优化它们的固态堆积和取向中起到了协同作用，进而导致更长的激子寿命和在体异质结(BHJ)混合中更快的电荷转移速率。

因此，与PBDB-TF聚合物混合后的PTB4Cl使单结有机光电池的能量转化效率提高到了12.76%，这一数据是目前报道过的非稠环电子受体中最高的之一。

据介绍，尽管有机光伏(OPV)在近年来取得了显着进展，但仍需要努力实现效率、稳定性和成本之间的平衡。

附：英文原文

Title: Simple Non‐Fused Electron Acceptors Leading to Efficient Organic Photovoltaics

Author: Tian-Jiao Wen, Zhi-Xi Liu, Zeng Chen, Jiadong Zhou, Ziqiu Shen, Yiqun Xiao, Xinhui Lu, Zengqi Xie, Haiming Zhu, Chang-Zhi Li, Hongzheng Chen

Issue&Volume: 2021-04-02

Abstract: Despite the remarkable progress being achieved in recent years, organic photovoltaics (OPVs) still need working to approach the balance among the efficiency‐stability‐cost correlation. Herein, two fully non‐fused electron acceptors, PTB4F and PTB4Cl are developed via two‐step synthesis from single aromatic units. The introduction of two‐dimensional chain and halogenated terminals for these non‐fused acceptors plays synergistic roles in optimizing their solid stacking and orientation, thus promoting an elongated exciton lifetime and fast charge transfer rate in bulk heterojunction (BHJ) blends. As results, PTB4Cl, upon blending with PBDB‐TF polymer, has enabled single‐junction OPVs with power conversion efficiencies of 12.76%, representing the highest values among the reported fully non‐fused ring electron acceptors so far.

DOI: 10.1002/anie.202101867

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202101867