Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 10, Pages 1579-1582Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.08.038
Keywords
Quantum dots-sensitized solar cells; Co-sensitization; TiO2 nanotube; CdSe; Spectral broadening
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Funding
- Nano RD program
- Ministry of Education, Science and Technology [M1080300131008M 030031010]
- Research Center for Energy Conversion and Storage [R11-2002-10200000-0]
- Brain Korea 21
- National Research Foundation of Korea [과06A1507, R01-2004-000-10143-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In order to absorb a broad spectrum in the visible region, vertically aligned TiO2 nanotubes (TONTs) were co-sensitized by two different sizes of CdSe quantum dots (Q dots). The power conversion efficiency of co-sensitized Q dots solar cells showed 1.20%. The co-sensitization of Q dots showed higher performance than the single size sensitization. The incident photon-to-current conversion efficiency of co-sensitized TONTs electrode showed two absorption peaks at 520 and 550 nm demonstrating the sensitization of Q dots with two different sizes. This efficiency enhanced charge harvesting efficiency over the entire visible spectrum, particularly the 500-600 nm wavelength domains. (C) 2008 Elsevier B.V. All rights reserved.
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