Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 156, Issue 1-3, Pages 48-51Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2008.11.014
Keywords
Photoelectrochemical solar cell; Recombination; Charge collection; Carbon nanotube; PbS
Funding
- Korea government (MEST) [R11-2008-088-03001-0]
- Brain Korea 21
- National Research Foundation of Korea [R11-2008-088-03001-0, 2008-0062070] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Single-walled carbon nanotubes (SWNTs) layers formed on indium-doped tin oxide (ITO) electrodes for enhanced photoconversion efficiency of PbS/TiO2 quantum dots (Qdots)-sensitized photoelectrochemical solar cells (PECs). The short-circuit current of Q dots-sensitized PECs with SWNTs layers increased under illumination, and the dark current of the PECs was also reduced without illumination. Furthermore, the electron lifetimes of PbS/TiO2/SWNTs in open-circuit voltage decay is higher than that of PbS/TiO2 films at the same voltage. As a result, the power conversion efficiency of PbS/TiO2 on ITO increased 35.6% in the presence of SWNTs due to the improved charge-collecting efficiency and reduced recombination process. (C) 2008 Elsevier B.V. All rights reserved.
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