Ultrafast Electron Transfer at Organic Semiconductor Interfaces: Importance of Molecular Orientation
- Title
- Ultrafast Electron Transfer at Organic Semiconductor Interfaces: Importance of Molecular Orientation
- Author
- 김도환
- Issue Date
- 2014-12
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 권: 6, 호: 1, 페이지: 6-12
- Abstract
- Much is known about the rate of photoexcited charge generation in at organic donor/acceptor (D/A) heterojunctions overaged over all relative arrangements. However, there has been very little experimental work investigating how the photoexcited electron transfer (ET) rate depends on the precise relative molecular orientation between D and A in thin solid films. This is the question that we address in this work. We find that the ET rate depends strongly on the relative molecular arrangement: The interface where the model donor compound copper phthalocyanine is oriented face-on with respect to the fullerene C-60 acceptor yields a rate that is approximately 4 times faster than that of the edge-on oriented interface. Our results suggest that the D/A electronic coupling is significantly enhanced in the face-on case, which agrees well with theoretical predictions, underscoring the importance of controlling the relative interfacial molecular orientation.
- URI
- https://pubs.acs.org/doi/10.1021/jz502253rhttp://hdl.handle.net/20.500.11754/51986
- ISSN
- 1948-7185
- DOI
- 10.1021/jz502253r
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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