Single‐Junction Organic Photovoltaic Cells with Approaching 18% Efficiency

文章来源: 发布时间:2021-01-27

Cui Yong, Yao Huifeng,* Zhang Jianqi, Xian Kaihu, Zhang Tao, Hong Ling, Wang Yuming, Xu Ye, Ma Kangqiao, An Cunbin, He Chang, Wei Zhixiang, Gao Feng, Hou Jianhui

Advanced Materials 2020, 32, 1908205.

Organic photovoltaic (OPV) cells are very promising next-generation photovoltaic technologies to harvest clean and renewable solar energy. Improving power conversion efficiencies (PCEs) is one of the most important tasks to increase the competitiveness of OPV cells when compared with other technologies. Over the past few years, the development of non-fullerene acceptors such as Y6, has contributed greatly to rapid increases in the PCEs of OPV cells to over 17%. For an excellent molecular skeleton-like Y6, it’s of great challenge to optimize its chemical structure and further improve its photovoltaic performance. Recently, the research team includes a group led by Prof. HOU Jianhui at the Institute of Chemistry, Chinese Academy of Sciences and a group led by Prof. WEI Zhixiang at the National Center for Nanoscience and Technology and a group led by Prof. GAO Feng from the Linköping University achieved significant improvement in PCEs for single-junction OPV cells. They finely tuned the alky chains and terminal groups of Y6. They found that the optimal material possesses enhanced intermolecular packing and thus benefited charge transport in devices. As a result, the best device recorded a maximum PCE of 17.8% and get a certified value of 17.3% in the National Institute of Metrology, which are outstanding values in OPV cells, showing a bright further of practical applications shortly.

文章链接:https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201908205