Increased efficiency of ZnO dye-sensitized solar cell using hierarchical nanowires = 계층적 나노와이어를 이용한 산화아연 염료감응태양전지의 효율 증대

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The novel selective hierarchical growth approach represent low cost, all solution hydrothermal process that yields complex hierarchical ZnO nanowire photoanodes by utilizing a simple manipulation of seed particles and capping polymer was demonstrated to increase the total power conversion efficiency. As the result of the hierarchical nanowire structure, the overall light-conversion efficiency was nearly five times than the efficiency of simple vertically aligned ZnO nanostructure DSSCs. The increase of efficiency is correspond to significantly enhanced photo-anode surface area for higher dye loading, light harvesting and decreased the charge combination by direct conduction path along the “nanotree” structure. As the length of the branches increased, the branches became flaccid and the increase in solar cell efficiency slowed down because the effective surface area increase was hindered by branch bundling during the drying process and subsequent decrease in the dye loading.
Advisors
Ko, Seung-Hwanresearcher고승환
Description
한국과학기술원 : 기계공학전공,
Publisher
한국과학기술원
Issue Date
2013
Identifier
561389/325007 / 020095391
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 기계공학전공, 2013.8, [ v, 51 p. ]

Keywords

zinc oxide nanowire; 나노숲; 계층적 성장; 가지사슬구조; 염료감응태양전지; 산화아연 나노와이어; dye-sensitized solar cell; branched structure; hierarchical growth; nanoforest

URI
http://hdl.handle.net/10203/197435
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=561389&flag=dissertation
Appears in Collection
ME-Theses_Ph.D.(박사논문)
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