Hoang Nong V, Nikolis Vasileios C, Baisinger Lukasz, Vandewal Koen, Pshenichnikov Maxim S
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Dresden Integrated Center for Applied Physics and Photonic Materials, Technische Universität Dresden, Nöthnitzer Strasse 61, 01187, Dresden, Germany.
Phys Chem Chem Phys. 2021 Sep 29;23(37):20848-20853. doi: 10.1039/d1cp03328j.
Single-material organic solar cells have recently attracted research attention due to their simplicity, morphological robustness and high yield of exciton dissociation. Using α-sexithiophene as a model system, we show that the single-event probability of the exciton dissociation at the boundaries of polycrystalline domains with different molecular orientation is extremely low (∼0.5%), while a high efficiency of charge generation is gained hundred-fold crossings of the domain boundaries due to the long exciton diffusion length (∼45 nm).
单材料有机太阳能电池因其结构简单、形态稳定性高以及激子解离产率高，近来受到了研究关注。以α-六噻吩作为模型体系，我们发现，在具有不同分子取向的多晶域边界处，激子解离的单事件概率极低（约0.5%），然而，由于激子扩散长度较长（约45纳米），域边界的百倍交叉实现了高效的电荷产生。
