纳米压印诱导聚合物太阳能电池中的纳米形貌转变：增强的电学和光学性能。
Nanoimprinting-induced nanomorphological transition in polymer solar cells: enhanced electrical and optical performance.
机构信息
†Graduate School of Energy, Environment, Water, and Sustainability (EEWS), ‡Graphene Research Center, §Department of Chemical and Biomolecular Engineering, and ∥Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Korea Advanced Institute Science and Technology (KAIST), Daejeon 305-701, Republic of Korea.
出版信息
ACS Nano. 2015 Mar 24;9(3):2773-82. doi: 10.1021/nn506678a. Epub 2015 Feb 25.
We have investigated the effects of a directly nanopatterned active layer on the electrical and optical properties of inverted polymer solar cells (i-PSCs). The capillary force in confined molds plays a critical role in polymer crystallization and phase separation of the film. The nanoimprinting process induced improved crystallization and multidimensional chain alignment of polymers for more effective charge transfer and a fine phase-separation between polymers and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) to favor exciton dissociation and increase the generation rate of charge transfer excitons. Consequently, the power conversion efficiency with a periodic nanostructure was enhanced from 7.40% to 8.50% and 7.17% to 9.15% in PTB7 and PTB7-Th based i-PSCs, respectively.
我们研究了活性层的直接纳米图案化对倒置聚合物太阳能电池（i-PSCs）的电气和光学性质的影响。受限模具中的毛细力在聚合物的结晶和薄膜的相分离中起着关键作用。纳米压印工艺诱导了聚合物的更好结晶和多维链排列，以实现更有效的电荷转移，并在聚合物和[6,6]-苯基-C71-丁酸甲酯（PC71BM）之间形成精细的相分离，有利于激子解离并提高电荷转移激子的产生速率。因此，具有周期性纳米结构的功率转换效率分别从 7.40%提高到 8.50%和从 7.17%提高到 9.15%，在基于 PTB7 和 PTB7-Th 的 i-PSCs 中。
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