期刊
ADVANCED ENERGY MATERIALS
卷 4, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201301332
关键词
donor distances; acceptor distances; charge transfer states; charge recombination; organic solar cells; interfaces
类别
资金
- PRESTO, Japan Science and Technology Agency
- Chinese Scholarship Council
Organic solar cells (OSCs) are promising low-cost devices for generating electricity. In addition to fill factor, the short circuit current density (J(SC)) and the open circuit voltage (V-OC) are two key factors that have critical influence on the device performance. The energy levels of the donor and acceptor materials are crucial for achieving a high J(SC) and V-OC. However, the interfacial structures between the organic materials substantially affect the J(SC) and V-OC through the energy of the charge transfer (CT) states and the charge separation and recombination reaction kinetics. Here, it is reported that separating the donor and acceptor layer in bilayer OSCs with a thin insulating layer increases the energy of the CT state by weakening the Coulomb interaction at the interface and this also suppresses photoinduced CT and recombination. Although these effects usually increase V-OC and decrease J(SC), the trade-off is avoided by doping the insulating layer with a dye to utilize the energy transfer process. The increase in V-OC without the reduction in J(SC) enhances the conversion efficiency of the OSCs by 30%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据