Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3098400
Keywords
carbon nanotubes; charge exchange; electrodes; II-VI semiconductors; photochemistry; photoluminescence; semiconductor growth; semiconductor quantum dots; semiconductor-insulator boundaries; solar cells; wide band gap semiconductors; zinc compounds
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Funding
- Korea Science and Engineering Foundation (KOSEF)
- Korea government (MEST) [R0A-2007-000-20044-0]
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In situ growth of ZnO quantum dots (QDs) on the surface of multiwalled carbon nanotubes (MWCNTs) was realized via a mild solution-process method, which resulted in an improvement in photoinduced charge separation and transport of carriers to the collecting electrode. The charge transfer efficiency was significantly increased by more than 90% due to the conjugation of ZnO QDs with MWCNTs, as confirmed by photoluminescence measurements. Ultraviolet photovoltaic cells based on the charge transfer at the ZnO QD-MWCNT heterostructures were fabricated, and their power conversion efficiency was measured to be above 1%.
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