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Charge transfer between acenes and PbS nanocrystals
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Dissanayake, D. M. N. M., Hatton, Ross A., Lutz, T., Curry, R. J. and Silva, S. R. P. (2009) Charge transfer between acenes and PbS nanocrystals. Nanotechnology, Vol.20 (No.19). Article: 195205. doi:10.1088/0957-4484/20/19/195205
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Official URL: http://dx.doi.org/10.1088/0957-4484/20/19/195205
Abstract
Organic-inorganic hybrid heterojunctions have potential as the basis for future photovoltaic devices. Herein, we report the results of investigations exploring the possibility of using pentacene and tetracene as photoelectron donors in conjunction with PbS nanocrystals (PbS-NCs). Photoinduced charge transfer was probed using external quantum efficiency measurements on acene: PbS-NC hybrid photovoltaic devices in conjunction with photoluminescence studies of the corresponding bilayer films. It is shown that photoelectron transfer from pentacene to the PbS-NCs is inefficient as compared to that between tetracene and PbS-NCs. The latter case can be rationalized in terms of the energy level alignment at the heterojunction assuming a common vacuum level. However, in the case of pentacene: PbS-NC junctions an interfacial energy level shift must be considered in order to explain the observations.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Journal or Publication Title: | Nanotechnology | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0957-4484 | ||||
| Official Date: | 13 May 2009 | ||||
| Dates: |
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| Volume: | Vol.20 | ||||
| Number: | No.19 | ||||
| Number of Pages: | 5 | ||||
| Page Range: | Article: 195205 | ||||
| DOI: | 10.1088/0957-4484/20/19/195205 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Royal Academy of Engineering/EPSRC Research Fellowship. |
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