Li Shuixing, Zhang Zhongqiang, Shi Minmin, Li Chang-Zhi, Chen Hongzheng
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
Phys Chem Chem Phys. 2017 Feb 1;19(5):3440-3458. doi: 10.1039/c6cp07465k.
Nowadays, organic solar cells (OSCs) with efficiencies over 10% have been achieved through the elaborate design of electron donors and fullerene acceptors. However, the drawbacks of fullerene acceptors, like poor absorption, limited chemical and energetic tunabilities, high-cost purification and morphological instability, have become the bottlenecks for the further improvement of OSCs. To overcome the mentioned shortages from fullerene, research studies on non-fullerene electron acceptors have boomed. To date, the highest efficiency of fullerene-free OSCs has been pushed to be 12%, which surpasses that of fullerene-based OSCs. In this perspective, we focus on summarizing the development of small molecule electron acceptors designed to replace the fullerene derivatives. Since it has been revealed that the search for matched donor:acceptor pairs is important for accomplishing high efficiencies, we therefore divide electron acceptors into several categories according to the donors used in fullerene-free OSCs. After the introduction of these acceptors, we outline the designing rules as well as perspectives for the development of non-fullerene acceptors. We believe that the development of non-fullerene electron acceptors will make organic photovoltaics closer to practical applications.
如今，通过对电子给体和富勒烯受体的精心设计，已实现了效率超过10%的有机太阳能电池（OSC）。然而，富勒烯受体的缺点，如吸收较差、化学和能量可调性有限、高成本纯化以及形态不稳定性，已成为OSC进一步改进的瓶颈。为了克服富勒烯的上述缺点，对非富勒烯电子受体的研究蓬勃发展。迄今为止，无富勒烯OSC的最高效率已提高到12%，超过了基于富勒烯的OSC。从这个角度来看，我们专注于总结旨在取代富勒烯衍生物的小分子电子受体的发展情况。由于已经表明寻找匹配的给体：受体对对于实现高效率很重要，因此我们根据无富勒烯OSC中使用的给体将电子受体分为几类。在介绍了这些受体之后，我们概述了非富勒烯受体的设计规则以及发展前景。我们相信非富勒烯电子受体的发展将使有机光伏更接近实际应用。
