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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:110 Issue:5 Help

Enhanced electron lifetime in CdS quantum dot-sensitized solar cells with nanoporous-layer-covered TiO2 nanotube arrays

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7 Author(s)
Woo Jung, Sung ; School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea ; Park, Jeong-Hyun ; Lee, Wonjoo ; Kim, Jae-Hong
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3630114 

CdS quantum dots (QDs) of 6.8–6.9 nm were assembled in situ on conventional TiO2 nanotube arrays (Type I) and nanoporous-layer-covered nanotube arrays (Type II). The QD-sensitized solar cell with the Type II nanotubes exhibited significantly enhanced overall energy conversion efficiency, despite having less assembled QDs. This was due to the Type II nanotube arrays having fewer defects and suppressed recombination rate (or back electron transport) from surface traps in the TiO2 to electron traps in the QDs, resulting in significantly improved electron lifetime.

Published in:
Journal of Applied Physics  (Volume:110 ,  Issue: 5 )

Date of Publication: Sep 2011

Page(s):
054301 - 054301-5
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.3630114
Product Type:
Journals & Magazines
Date of Current Version :
05 September 2011
Issue Date :
Sep 2011

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