Browsing by Author "Wang, Hsu-Shen"

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Directly grafts the conjugated polymer to nanoparticle surface synthesis, characterization and application for organic electronic devices
(2007-03-25)
Wang, Hsu-Shen
;
Wei, Kung-Hwa
;
材料科學與工程學系
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Department of Materials Science and Engineering
Inverted heterojunction solar cells incorporating fullerene/polythiophene composite core/shell nanorod arrays
(2010-04-09)
Wang, Hsu-Shen
;
Chen, Shih-Yung
;
Su, Ming-Hsin
;
Wang, Yuh-Lin
;
Wei, Kung-Hwa
We have fabricated inverted heterojunction solar cell devices incorporating [6,6]-phenyl-C(61)-butyric acid methyl ester/poly(3-hexylthiophene) core/shell nanorod arrays by using an anodic alumina oxide template. The internal quantum efficiencies and external quantum efficiencies of these core/shell nanorod inverted solar cells were higher than those of the corresponding conventional inverted bulk heterojunction device. The optimized nanorod array structure had a high hole mobility that was over one order magnitude greater than that of the conventional bulk heterojunction structure, as determined by fitting the dark J-V curves into the space charge limited current model. The more efficient carrier transport of the device incorporating the core/shell nanorod arrays provided it with both a higher short-circuit current density and power conversion efficiency.
Nanostructured Nanorod Arrays Presenting TiO(2) Nanorods/Poly(3-hexylthiophene) for Solar Cells Application
(2011-04-01)
Wang, Hsu-Shen
;
Chen, Shih-Yung
;
Wang, Yuh-Lin
;
Wei, Kung-Hwa
;
材料科學與工程學系
We have fabricated inverted heterojunction solar cell devices incorporating titanium dioxide nanorod/poly(3-hexylthiophene) (P3HT) rod arrays using melt-assisted anodic alumina oxide template. Using transmission electron microscopy and conductance atomic force microscopy, we revealed that phase-separated TiO(2) rich (n-type) and P3HT rich (p-type) regions presents in these rod arrays. The optimized composite rod array structure had a higher hole mobility than that of the blend film consisting of TiO(2) nanorod and P3HT as determined by fitting the dark J-V curves into the space charge-limited current model. The more efficient carrier transport of the device incorporating the nanorod arrays provided it with both a higher short-circuit current density and power conversion efficiency.
Nanostructured Nanorod Arrays Presenting TiO2 Nanorods/Poly(3-hexylthiophene) for Solar Cells Application
(2011-04-01)
Wang, Hsu-Shen
;
Chen, Shih-Yung
;
Wang, Yuh-Lin
;
Wei, Kung-Hwa
;
材料科學與工程學系
We have fabricated inverted heterojunction solar cell devices incorporating titanium dioxide nanorod/poly(3-hexylthiophene) (P3HT) rod arrays using melt-assisted anodic alumina oxide template. Using transmission electron microscopy and conductance atomic force microscopy, we revealed that phase-separated TiO2 rich (n-type) and P3HT rich (p-type) regions presents in these rod arrays. The optimized composite rod array structure had a higher hole mobility than that of the blend film consisting of TiO2 nanorod and P3HT as determined by fitting the dark J-V curves into the space charge-limited current model. The more efficient carrier transport of the device incorporating the nanorod arrays provided it with both a higher short-circuit current density and power conversion efficiency.
Ordered polythiophene/fullerene composite core-shell nanorod arrays for solar cell applications
(2009-02-18)
Wang, Hsu-Shen
;
Lin, Li-Hua
;
Chen, Shih-Yung
;
Wang, Yuh-Lin
;
Wei, Kung-Hwa
For the first time, we have used melt-assisted wetting of porous alumina templates to prepare ordered core-shell nanorod arrays of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) for use in polymer solar cells. We characterized these arrays using tunneling electron microscopy and conductance atomic force microscopy, which revealed the presence of phase-separated shell (p-type) and core (n-type) regions. Under illumination, we observed a variation of several picoamperes between the currents in the core and shell regions of the P3HT/PCBM nanorod arrays.
Synthesis and Characterization of Donor-Acceptor Poly(3-hexylthiophene) Copolymers Presenting 1,3,4-Oxadiazole Units and Their Application to Photovoltaic Cells
(2010-08-01)
Wang, Hsu-Shen
;
Su, Ming-Shin
;
Wei, Kung-Hwa
;
材料科學與工程學系
;
Department of Materials Science and Engineering
We have used Grignard metathesis polymerization to prepare poly(3-hexylthiophene)-based copolymers containing electron-withdrawing 4-tert-butylphenyl-1,3,4-oxadiazole-Phenyl moieties as side chains. We characterized these copolymers using (1)H and (13)C nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The band gap energy of copolymer was determined from the onset of the optical absorption. The quenching effects were observed in the photoluminescence spectra of the copolymers incorporating pendant electron-deficient 1,3,4-oxadiazole moieties on the side chains. The photocurrents of devices were enhanced in the presence of an optimal amount of the 1,3,4-oxadiazole moieties, thereby leading to improved power conversion efficiencies. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3331-3339, 2010
Thiophenol-modified CdS nanoparticles enhance the luminescence of benzoxyl dendron-substituted polyfluorene copolymers
(2006-05-02)
Chou, Chia-Hung
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Wang, Hsu-Shen
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Wei, Kung-Hwa
;
Huang, Jung Y.
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材料科學與工程學系
Highly luminescent dendron-substituted copolyfluorenes that incorporate surface-modified cadmium sulfide nanoparticles have been prepared. A small percentage of these nanoparticles can be incorporated into the dendritic structures upon tailoring the interfaces between the ligands on the nanoparticles and the dendritic structures in the copolyfluorene. Both the photoluminescence and electroluminescence efficiencies of the polymer nanocomposites are dramatically enhanced-sometimes more than doubled-relative to the values of the pure polymer.