Zhang Kai, Ying Lei, Yip Hin-Lap, Huang Fei, Cao Yong
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China.
ACS Appl Mater Interfaces. 2020 Sep 9;12(36):39937-39947. doi: 10.1021/acsami.0c09909. Epub 2020 Aug 25.
Organic solar cells (OSCs) have demonstrated considerable potential in utilizing renewable solar energy because of their distinct advantages of light weight, low cost, and good flexibility. In the past decade, tremendous development in power conversion efficiency (PCE) from ∼7% to more than 17% has been witnessed. Among the various strategies of improving the PCE of OSCs, tandem structure is one of the most effective ways. In this Spotlight on Applications, we first introduce active-layer materials that we developed and selected for tandem OSC construction. We then emphasize an interconnecting layer (ICL) that we developed based on polymeric electron-transport layers. Benefiting from the organic nature of polymeric materials, the electron extraction ability and charge-transport ability of the organic electron-transport layer can be easily tuned by modifying the molecular structure or using a binary strategy, which enables us to obtain highly efficient tandem OSCs. Moreover, an ICL composed of a polymeric electron and hole-transport layer offers intrinsic advantage in obtaining a flexible tandem device and is compatible with the printing technique for fabricating large-area devices. After that, the application of the transfer matrix modeling method in predicting the best tandem OSCs architecture is introduced. Lastly, the possible research interests of tandem OSCs in the future from our point of view is discussed.
有机太阳能电池（OSCs）因其重量轻、成本低和柔韧性好等独特优势，在利用可再生太阳能方面展现出了巨大潜力。在过去十年中，见证了其功率转换效率（PCE）从约7%大幅提升至超过17%的巨大发展。在提高有机太阳能电池功率转换效率的各种策略中，串联结构是最有效的方法之一。在本应用聚焦中，我们首先介绍我们为串联有机太阳能电池构建而开发和选择的活性层材料。然后，我们着重介绍基于聚合物电子传输层开发的互连层（ICL）。得益于聚合物材料的有机特性，通过修饰分子结构或采用二元策略，可以轻松调节有机电子传输层的电子提取能力和电荷传输能力，这使我们能够获得高效的串联有机太阳能电池。此外，由聚合物电子和空穴传输层组成的互连层在获得柔性串联器件方面具有内在优势，并且与用于制造大面积器件的印刷技术兼容。之后，介绍了转移矩阵建模方法在预测最佳串联有机太阳能电池结构方面的应用。最后，从我们的角度讨论了串联有机太阳能电池未来可能的研究方向。
