Browsing by Author "Wang, Yuh-Lin"

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Enhanced Performance and Stability of a Polymer Solar Cell by Incorporation of Vertically Aligned, Cross-Linked Fullerene Nanorods
(2011)
Chang, Chih-Yu
;
Wu, Cheng-En
;
Chen, Shih-Yung
;
Cui, Chaohua
;
Cheng, Yen-Ju
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.
Pseudospectral Modeling of Nano-Optics in Ag Sphere Arrays
(2010-10-01)
Lin, Bang-Yan
;
Teng, Chun-Hao
;
Chang, Hung-Chun
;
Hsiao, Hui-Hsin
;
Wang, Juen-Kai
We report a Legendre pseudospectral modeling of silver sphere arrays illuminated by light waves. A special feature of the present computation is that the dispersive nature of silver is described by a Drude-Lorentz model with model parameters obtained by fitting the frequency-domain complex-valued dielectric constants measured experimentally. Numerical validations are conducted based on solving both the near and far fields of the Mie scattering problem, and we observe good convergence on the numerical fields. The far-field patterns of the Ag sphere arrays are simulated. The results are compared to those obtained by the dipole-coupling-model method, and we observe very good agreement between these results. The near-field patterns are also computed, and localized enhanced electric fields in the inter-particle gap regions due to plasmonic coupling between Ag particles are visualized. As the gap between Ag particles is reduced the strength of the localized enhanced electric field is increased.
Pseudospectral Modeling of Nano-Optics in Ag Sphere Arrays
(2010-10-01)
Lin, Bang-Yan
;
Teng, Chun-Hao
;
Chang, Hung-Chun
;
Hsiao, Hui-Hsin
;
Wang, Juen-Kai
We report a Legendre pseudospectral modeling of silver sphere arrays illuminated by light waves. A special feature of the present computation is that the dispersive nature of silver is described by a Drude-Lorentz model with model parameters obtained by fitting the frequency-domain complex-valued dielectric constants measured experimentally. Numerical validations are conducted based on solving both the near and far fields of the Mie scattering problem, and we observe good convergence on the numerical fields. The far-field patterns of the Ag sphere arrays are simulated. The results are compared to those obtained by the dipole-coupling-model method, and we observe very good agreement between these results. The near-field patterns are also computed, and localized enhanced electric fields in the inter-particle gap regions due to plasmonic coupling between Ag particles are visualized. As the gap between Ag particles is reduced the strength of the localized enhanced electric field is increased.
Rapid identification of nicotine in electronic cigarette liquids based on surface-enhanced Raman scattering
(2020-01-01)
Chien, Jun-Yi
;
Gu, Yong-Chun
;
Tsai, Hsin-Mei
;
Liu, Chun-Hao
;
Yen, Chia-Yuan
Nicotine-containing electronic cigarette liquid (e-liquid) is prohibited in many countries, creating requirements for rapid detection approaches for on-site inspection or screening for large amounts of samples. Here, we demonstrate a simple way to identify nicotine using surface-enhanced Raman scattering (SERS) with substrates made of silver nanoparticle arrays imbedded in anodic aluminum oxide nanochannels (Ag/AAO). Compared with the reported colloidal nanoparticle-based SERS, that required serial dilutions to enable colloid aggregation in the viscous e-liquid, a small amount of undiluted e-liquid sample can be directly added onto our solid-phase Ag/AAO substrate without any pre-treatment. The sensitivity of our SERS measurements is 2-3 orders of magnitude higher than that required for identification of nicotine in e-liquid, which is typically around 1000-18,000 ppm. Using such nanoparticle array-based SERS, we have tested 22 commercially available e-liquid products, using the corresponding gas chromatography-mass spectrometry (GC-MS) reports as the reference. The SERS measurements were done within one hour and successfully identified 20 samples. Only 2 samples showed SERS interference from ingredients that were not suitable for SERS analysis.