期刊
ELECTROCHIMICA ACTA
卷 127, 期 -, 页码 427-432出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.02.019
关键词
Nano-rice structure; Quantum dot solar cell; Nickel sulfide; Counter electrode; Charge transfer resistance
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0014437]
Facile and nabo-rice structured nickel sulfide (NiS) thin films were synthesized and utilized as counter electrode (CE) in quantum dot sensitized solar cells (QDSSCs) for polysulfide redox reactions. NiS thin films deposited on fluorine-doped tin oxide substrate results in formation of highly efficient CE for liquidjunction QDSSCs. Under illumination of 1 sun (100 mW cm(-2)), the QDSSC based NiS CE exhibited power conversion efficiency (eta) of 2.97%, which is higher than platinum (1.45%) CE. Electrochemical impedance spectroscopy affirms that high value of eta in NiS CE is due to the elevated electro-catalytic activity towards polysulfide electrolyte reduction and also due to the scale-down in the charge transfer resistance (3.16 Omega) at the CE-electrolyte interface. (C) 2014 Elsevier Ltd. All rights reserved.
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