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Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals
- Authors
- Lee, Wonjoo; Kwak, Woo-Chul; Min, Sun Ki; Lee, Jung-Chul; Chae, Won-Seok; Sung, Yun-Mo; Han, Sung-Hwan
- Issue Date
- 11월-2008
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- Quantum dots-sensitized solar cells; Photoelectrochemical cells; Spectral broadening; Co-sensitization; CdSe
- Citation
- ELECTROCHEMISTRY COMMUNICATIONS, v.10, no.11, pp.1699 - 1702
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHEMISTRY COMMUNICATIONS
- Volume
- 10
- Number
- 11
- Start Page
- 1699
- End Page
- 1702
- ISSN
- 1388-2481
- Abstract
- In order to absorb a broad spectrum in visible region, a co-sensitized TiO2 electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm(2)), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500600 nm wavelength domains. (C) 2008 Elsevier B.V. All rights reserved.
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