Ultrafast Electron Transfer at Organic Semiconductor Interfaces: Importance of Molecular Orientation
- Authors
- Ayzner, Alexander L.; Nordlund, Dennis; Kim, Do-Hwan; Bao, Zhenan; Toney, Michael F.
- Issue Date
- 1-Jan-2015
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.6, no.1, pp.6 - 12
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS
- Volume
- 6
- Number
- 1
- Start Page
- 6
- End Page
- 12
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/8829
- DOI
- 10.1021/jz502253r
- ISSN
- 1948-7185
- 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.
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Collections - College of Engineering > Department of Organic Materials and Fiber Engineering > 1. Journal Articles
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