期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 114, 期 17, 页码 5704-5709出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp100241g
关键词
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资金
- Sustainable Energy Education and Research Center
- Center for Materials Processing at the University of Tennessee
- Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1102011] Funding Source: National Science Foundation
The electron-hole pairs can be formed in intermolecular charge-transfer (CT) states between two adjacent molecules clue to Coulomb interaction in organic semiconducting, materials. In general, the exciton dissociation can experience the intermediate states: intermolecular CT states at the donor-acceptor interfaces to generate a photocurrent in organic solar cells. This article reports the magneto-optical studies on intermolecular CT states in the generation of photocurrent by using magnetic field effects of photocurrent (MFEPC) and light-assisted dielectric response (LADR). The MFEPC and LADR studies reveal that internal electrical drifting and local Coulomb interaction can largely change the formation and dissociation of CT states by changing internal charge-transport channels and local Coulomb interaction through morphological development upon thermal annealing. Therefore, the MFEPC and LADR can be used as effective magneto-optical tools to investigate charge recombination, separation, and transport in organic solar cells.
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