CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.
School of Chemistry, Beihang University, No. 37 Xueyuan Road, Beijing, 100191, P. R. China.
Adv Mater. 2019 Nov;31(45):e1805708. doi: 10.1002/adma.201805708. Epub 2019 Jan 2.
Organic bulk heterojunction solar cells (OSCs) and hybrid halide perovskite solar cells (PSCs) are two promising photovoltaic techniques for next-generation energy conversion devices. The rapid increase in the power conversion efficiency (PCE) in OSCs and PSCs has profited from synergetic progresses in rational material synthesis for photoactive layers, device processing, and interface engineering. Interface properties in these two types of devices play a critical role in dictating the processes of charge extraction, surface trap passivation, and interfacial recombination. Therefore, there have been great efforts directed to improving the solar cell performance and device stability in terms of interface modification. Here, recent progress in interfacial doping with biopolymers and ionic salts to modulate the cathode interface properties in OSCs is reviewed. For the anode interface modification, recent strategies of improving the surface properties in widely used PEDOT:PSS for narrowband OSCs or replacing it by novel organic conjugated materials will be touched upon. Several recent approaches are also in focus to deal with interfacial traps and surface passivation in emerging PSCs. Finally, the current challenges and possible directions for the efforts toward further boosts of PCEs and stability via interface engineering are discussed.
有机体异质结太阳能电池（OSCs）和混合卤化物钙钛矿太阳能电池（PSCs）是两种有前途的下一代能源转换器件的光伏技术。OSCs 和 PSCs 的功率转换效率（PCE）的快速提高得益于光活性层、器件处理和界面工程中合理材料合成的协同进展。这两种类型的器件中的界面性质在决定电荷提取、表面陷阱钝化和界面复合过程中起着关键作用。因此，人们已经做出了巨大的努力，通过界面改性来提高太阳能电池的性能和器件稳定性。在这里，我们回顾了用生物聚合物和离子盐进行界面掺杂来调节 OSCs 阴极界面性质的最新进展。对于阳极界面改性，我们将涉及到改善窄带 OSCs 中广泛使用的 PEDOT:PSS 的表面性质或用新型有机共轭材料取代它的最新策略。还将重点关注处理新兴 PSCs 中的界面陷阱和表面钝化的几种最新方法。最后，讨论了通过界面工程进一步提高 PCE 和稳定性的努力所面临的当前挑战和可能方向。
