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RISS 인기검색어
- 검색키워드
- 저자 : Chin-Guo Kuo (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Fabrication of a Pb-Sn Nanowire Array Gas Sensor Using a Novel High Vacuum Die Casting Technique
Chin-Guo Kuo,Ho Chang,Lih-Ren Hwang,Shu Hor,Jia-Shin Chen,Guo-yan Liu,Sheng-Cheng Cheng 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.4
In this study, an anodic aluminum oxide nanomold was obtained by etching on an aluminum substrate at a purity of 99.7% with an oxalic acid electrolyte. After etching, a nanomold was prepared with pores that were measured at 80 nm in diameter. This nanomold was used as a base. Using the vacuum casting method,the Pb-Sn alloy was die-cast into the nanomold and consequently shaped into a Pb-Sn alloy nanowire of 80 nm in diameter and 50 μm in length. After solidification, a Pb-Sn nanowire array was obtained. The array of Pb-Sn nanowires prepared in this study can be applied to a gas sensor. Microstructural analysis of the AAO nanomold and the Pb-Sn nanowire array are performed by SEM and XRD.
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Ho Chang,Chin-Guo Kuo,Cheng-Yi Chou 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
Highly ordered arrays of TiO2 photoelectrode thin films of dye-sensitized solar cells (DSSCs) were fabricated by anodic oxidation method. This study analyzed the effects of electrolytes under similar NH4F concentrations but different reaction times in the anodic oxidation process on the photoelectric conversion efficiency of DSSC, open-circuit voltage decay, electron lifetime, and incident photon-to-electron conversion efficiency (IPCE) of the prepared DSSC. Experimental results show that the TiO2 nanotube thin film prepared by anodic oxidation with an electrolyte with a NH4F concentration at 0.5 wt% and with a reaction time of 5 hr can be fabricated with a length of 17 μm and a photoelectric conversion efficiency of 4.87%, open-circuit voltage of 0.74 V, and short-circuit current density of 13.2 mA/cm2. Additionally, the same NH4F concentration but with a reaction time of 10 hr achieves a length of 22 μm and a photoelectric conversion efficiency of 6.58%, open-circuit voltage of 0.81 V, and short-circuit current density of 16.1 mA/cm2.
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Ho Chang,Mu-Jung Kao,Chin-Guo Kuo,Cheng-Yi Chou 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
This study develops photoelectrode thin film needed in back-illuminated dye-sensitized solar cells (DSSC) by the anodization method. We test the effects of electrolytes with different NH4F concentrations reaction time lengths in the anodic oxidation process on thephotoelectric conversion efficiency of DSSC, and measure the open-circuit voltage decay, lifetime of electrons and incident photontoelectronconversion efficiency (IPCE) of the prepared DSSC. Experimental results show that the TiO2 nanotube thin film prepared byanodic oxidation with an electrolyte with a NH4F concentration at 0.75 wt% and with a reaction time of 5 hr achieves a photoelectricconversion efficiency of 3.98%, open-circuit voltage of 0.723 V, and short-circuit current density of 11.3 mA/cm2, and has a longerelectron lifetime when compared to the electrolytes prepared at other NH4F concentrations. In addition, the photoelectrode thin filmprepared with a thickness of 22 μm under a reaction time of 10 hr and by an electrolyte with a NH4F concentration at 0.5 wt%achieves photoelectric conversion efficiency of as high as 4.76%, open-circuit voltage of 0.681 V, and short-circuit current densityof 15.91 mA/cm2.
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