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Pulse 전위를 적용한 전기화학적 증착 공정으로 제조된 가시광 활성 이종접합 $CuInS_2-TiO_2$ Nanotube 화합물 광전극
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  • Pulse 전위를 적용한 전기화학적 증착 공정으로 제조된 가시광 활성 이종접합 $CuInS_2-TiO_2$ Nanotube 화합물 광전극
저자명
윤정호,박영구,Yun. Jung-Ho,Park. Young-Koo
간행물명
한국유화학회지
권/호정보
2013년|30권 1호|pp.49-56 (8 pages)
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한국유화학회
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정기간행물|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Excellent electron transport properties with enhanced light scattering ability for light harvesting have made well-ordered one dimensional $TiO_2$ nanotube(TNT) arrays an alternative candidate over $TiO_2$ nanoparticles in the area of solar energy conversion applications. The principal drawback of TNT arrays being activated only by UV light has been addressed by coupling the TNT with secondary materials which are visible light-triggered. As well as extending the absorption region of sunlight, the introduction of these foreign components is also found to influence the charge separation and electron lifetime of TNT. In this study, a novel method to fabricate the TNT-based composite photoelectrodes employing visible responsive $CuInS_2$ (CIS) nanoparticles is presented. The developed method is a square wave pulse-assisted electrochemical deposition approach to wrap the inner and outer walls of a TNT array with CIS nanoparticles. Instead of coating as a dense compact layer of CIS by a conventional non-pulsed-electrochemical deposition method, the nanoparticles pack relatively loosely to form a rough surface which increases the surface area of the composite and results in a higher degree of light scattering within the tubular channels and hence a greater chance of absorption. The excellence coverage of CIS on the tubular $TiO_2$ allows the construction of an effective heterojunction that exhibits enhanced photoelectrochemical performance.