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An unconventional route to high-efficiency dye-sensitized solar cells via embedding graphitic thin films into TiO 2 nanoparticle photoanode

Title
An unconventional route to high-efficiency dye-sensitized solar cells via embedding graphitic thin films into TiO 2 nanoparticle photoanode
Authors
Jang Y.H.Xin X.Byun M.Jang Y.J.Lin Z.Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2012
Journal Title
Nano Letters
ISSN
1530-6984JCR Link
Citation
vol. 12, no. 1, pp. 479 - 485
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Graphitic thin films embedded with highly dispersed titanium dioxide (TiO 2) nanoparticles were incorporated for the first time into the conventional dye-sensitized solar cells (DSSCs), resulting in a remarkably improved cell efficiency due to its superior electron conductivity. Massively ordered arrays of TiO 2 dots embedded in carbon matrix were fabricated via UV-stabilization of polystyrene-block-poly(4-vinylpyridine) films containing TiO 2 precursors followed by direct carbonization. For dye-sensitized TiO 2 based solar cells containing carbon/TiO 2 thin layers at both sides of pristine TiO 2 layer, an increase of 40.6% in overall power conversion efficiency was achieved compared with neat TiO 2-based DSSCs. Such a remarkably improved cell efficiency was ascribed to the superior electron conductivity and extended electron lifetime elucidated by cyclic voltammetry and impedance spectroscopy. © 2011 American Chemical Society.
DOI
10.1021/nl203901m
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자연과학대학 > 화학·나노과학전공 > Journal papers
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