CdS quantum dots grown by in situ chemical bath deposition for quantum dot-sensitized solar cells

Title
CdS quantum dots grown by in situ chemical bath deposition for quantum dot-sensitized solar cells
Author(s)
정성우[정성우]김재홍김현수[김현수]최철종[최철종]안광순
Keywords
TIO2 FILMS; DYE; ELECTRODES; EFFICIENCY
Issue Date
201108
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.110, no.4
Abstract
CdS quantum dots (QDs) are grown on mesoporous TiO(2) films by 3 to 13 repeated cycles of in situ chemical bath deposition (CBD). The overall energy conversion efficiency of CdS quantum dot-sensitized solar cells (QD-SSCs) increases as the number of cycles increases to the eight - peaking at 2.13%. This is attributable to efficient light harvesting and charge-collection resulting from enhanced light absorption and faster charge transport. However a further increase of CBD cycles to thirteen reduces QD-SSCs performance, despite better light absorption in the long wavelengths. This is attributed to decreased charge-injection efficiency, which is due to reduced driving forces of carrier injection, increased trap-mediated recombination in the QDs, and hindered ion transport. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624944]
URI
http://hdl.handle.net/YU.REPOSITORY/24783http://dx.doi.org/10.1063/1.3624944
ISSN
0021-8979
Appears in Collections:
공과대학 > 화학공학부 > Articles
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