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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

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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
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:
DateEvent
13 May 2009Published
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.

Data sourced from Thomson Reuters' Web of Knowledge

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