期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 17, 页码 3417-3428出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b01147
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资金
- FIRST program (Development of Organic Photovoltaics toward a Low-Carbon Society: Pioneering Next Generation Solar Cell Technologies and Industries via Multimanufacturer Cooperation)
- JST PRESTO program (Photoenergy Conversion Systems and Materials for the Next Generation Solar Cells)
- JST CREST program (Phase Interface Science for Highly Efficient Energy Utilization)
- JST ALCA program (Solar Cell and Solar Energy Systems)
- JSPS KAKENHI [26248033]
- Grants-in-Aid for Scientific Research [26248033] Funding Source: KAKEN
Singlet exciton diffusion plays a central role in the photovoltaic conversion in organic photovoltaics (OPVs). Upon light absorption, singlet excitons are promptly generated in organic materials instead of charge carriers because the dielectric constant (epsilon(r)) is small (similar to 3-4), which is in sharp contrast to inorganic and perovskite solar cells. In order to convert to charge carriers, excitons need to diffuse into an interface between electron donor and acceptor materials before deactivating to the ground state. Therefore, fundamental understanding of exciton diffusion dynamics is one of the most important issues to further improve OPVs. We highlight recent leading studies in this field and describe several approaches for efficient exciton harvesting at the interface in OPVs.
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