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Cited by 1,644

The DOI matches its Crossref record; 63 of the 63 references it cites were found in a registry or an index.

Quantum Dot Solar Cells. Tuning Photoresponse through Size and Shape Control of CdSe−TiO2 Architecture

Open access
Kongkanand, Anusorn, Tvrdy, Kevin, Takechi, Kensuke, Kuno, Masaru, Kamat, Prashant V.·2008·Journal of the American Chemical Society

Abstract

Different-sized CdSe quantum dots have been assembled on TiO2 films composed of particle and nanotube morphologies using a bifunctional linker molecule. Upon band-gap excitation, CdSe quantum dots inject electrons into TiO2 nanoparticles and nanotubes, thus enabling the generation of photocurrent in a photoelectrochemical solar cell. The results presented in this study highlight two major findings: (i) ability to tune the photoelectrochemical response and photoconversion efficiency via size control of CdSe quantum dots and (ii) improvement in the photoconversion efficiency by facilitating the charge transport through TiO2 nanotube architecture. The maximum IPCE (photon-to-charge carrier generation efficiency) obtained with 3 nm diameter CdSe nanoparticles was 35% for particulate TiO2 and 45% for tubular TiO2 morphology. The maximum IPCE observed at the excitonic band increases with decreasing particle size, whereas the shift in the conduction band to more negative potentials increases the driving force and favors fast electron injection. The maximum power-conversion efficiency </=1% obtained with CdSe-TiO2 nanotube film highlights the usefulness of tubular morphology in facilitating charge transport in nanostructure-based solar cells. Ways to further improve power-conversion efficiency and maximize light-harvesting capability through the construction of a rainbow solar cell are discussed.

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Crossref · 10.1021/ja0782706

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Metadata

Authors
Kongkanand, A., Tvrdy, K., Takechi, K., Kuno, M., & Kamat, P. V.
Venue
Journal of the American Chemical Society
Published
2008-03-01
Volume
130
Issue
12
Pages
4007-4015
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1996320936
Cited by
1,644
References
63
FWCI
69.79
Type
journal article
Language
en
Open access
green

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