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Enhancing the open-circuit voltage of molecular photovoltaics using oxidized au nanocrystals
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Pegg, Lara-Jane, Schumann, Stefan and Hatton, Ross A. (2010) Enhancing the open-circuit voltage of molecular photovoltaics using oxidized au nanocrystals. ACS Nano, Vol.4 (No.10). pp. 5671-5678. doi:10.1021/nn101276z
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Official URL: http://dx.doi.org/10.1021/nn101276z
Abstract
For organic photovoltaics (OPV) to realize applications effective strategies to maximize the open-circuit voltage must be developed. Herein we show that solution-processed surface-oxidized Au nanoctystals (o-AuNC) dramatically increase the open-circuit voltage (V-oc) of OPV cells based on boron-subphthalocyanine chloride (SubPc)/C-60 and chloro-aluminum phthalocyanine (CIAIPc)/C-60 heterojunctions when incorporated at the interface between the hole-extracting electrode and the phthalocyanine donor layer. In addition, the cell-to-cell variation in V-oc is reduced by up to 10-fold combined with a large reduction in the light intensity dependence of V-oc, both of which are important advantages for practical application. The largest increase in V-oc is achieved for SubPc/C-60-based cells which exhibit a 45% increase to 1.09 +/- 0.01 V-an exceptionally high value for a single junction small molecule OPV. Remarkably these improvements are achieved using submonolayers of o-AuNC, which can be rationalized in terms of the exceptionally high work function of o-AuNC (similar to 5.9 eV) and geometric electric field enhancement effects.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QD Chemistry T Technology T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Journal or Publication Title: | ACS Nano | ||||
| Publisher: | American Chemical Society | ||||
| ISSN: | 1936-0851 | ||||
| Official Date: | October 2010 | ||||
| Dates: |
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| Volume: | Vol.4 | ||||
| Number: | No.10 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 5671-5678 | ||||
| DOI: | 10.1021/nn101276z | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), European Regional Development Fund (ERDF), Royal Academy of Engineering, Advantage West Midlands (AWM) | ||||
| Grant number: | 2 |
Data sourced from Thomson Reuters' Web of Knowledge
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