Large improvement of electron extraction from CdSe quantum dots into a TiO<sub>2</sub> thin layer by N3 dye coabsorption
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1016/j.tsf.2007.12.110 |
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Title
Large improvement of electron extraction from CdSe quantum dots into a TiO<sub>2</sub> thin layer by N3 dye coabsorptionDate
2008Publisher
ElsevierISSN
406090Bibliographic citation
Thin Solid Films, 516, 20, p. 6994-6998Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
Extraction of electrons and holes photogenerated in CdSe quantum dots (QD) of 2.3 nm diameter, is monitored by Surface Photovoltage Spectroscopy. The extraction of electrons into a thin TiO<sub>2</sub> layer increases ... [+]
Extraction of electrons and holes photogenerated in CdSe quantum dots (QD) of 2.3 nm diameter, is monitored by Surface Photovoltage Spectroscopy. The extraction of electrons into a thin TiO<sub>2</sub> layer increases five-fold by absorption of N3 dye molecules on top of the QD layer. This process is facilitated by efficient hole extraction from the valence band of the QDs to the ground state of the N3 dye. Our results represent a direct measurement of charge separation in the N3/QD/TiO<sub>2</sub> system. © 2007 Elsevier B.V. All rights reserved. [-]
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