Enhanced electron lifetime in CdS quantum dot-sensitized solar cells with nanoporous-layer-covered TiO(2) nanotube arrays

Title
Enhanced electron lifetime in CdS quantum dot-sensitized solar cells with nanoporous-layer-covered TiO(2) nanotube arrays
Author(s)
정성우[정성우]박정현[박정현]이원주[이원주]김재홍김현수[김현수]최철종[최철종]안광순
Keywords
DYE; EFFICIENCY; FILMS; PHOTOELECTRODES; RECOMBINATION; CIRCUIT
Issue Date
201109
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.110, no.5
Abstract
CdS quantum dots (QDs) of 6.8-6.9 nm were assembled in situ on conventional TiO(2) 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 TiO(2) to electron traps in the QDs, resulting in significantly improved electron lifetime. (C) 2011 American Institute of Physics. [doi:10.1063/1.3630114]
URI
http://hdl.handle.net/YU.REPOSITORY/24608http://dx.doi.org/10.1063/1.3630114
ISSN
0021-8979
Appears in Collections:
공과대학 > 화학공학부 > Articles
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