Molecular electron acceptors for efficient fullerene-free organic solar cells
Molecular electron acceptors for efficient fullerene-free organic solar cells
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用于高效无富勒烯有机太阳能电池的分子电子受体
DOI：
10.1039/c6cp07465k
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发表时间：
2017-02-07
影响因子：
3.3
通讯作者：
Chen, Hongzheng
中科院分区：
文献类型：
--
作者：
Li, Shuixing;Zhang, Zhongqiang;Chen, Hongzheng
目前，通过对电子给体和富勒烯受体的精心设计，已经实现了效率超过10%的有机太阳能电池（OSC）。然而，富勒烯受体的吸附性差、化学和能量可调性有限、纯化成本高、形态不稳定等缺点已成为制约其进一步发展的瓶颈。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，无富勒烯的OSC的最高效率已被推到12%，超过了基于富勒烯的OSC。在此基础上，重点综述了取代富勒烯衍生物的小分子电子受体的研究进展。由于已经发现，寻找匹配的供体：受体对对于实现高效率是重要的，因此我们根据在无富勒烯的OSC中使用的供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原则以及发展前景。我们相信，非富勒烯电子受体的开发将使有机光致变色材料更接近实际应用。
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.