期刊
ELECTROCHIMICA ACTA
卷 144, 期 -, 页码 71-75出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.08.009
关键词
PbS quantum dots; Pre-synthesized; Monodisperse; Quantum dots sensitized solar cells; Chemical bath deposition
资金
- National Natural Science Foundation of China [51303186]
- National Research Fund for Fundamental Key Project [2012CB932903]
In this paper, the pre-synthesized monodisperse PbS quantum dots were assembled on TiO2 films through direct adsorption. In consideration of the easy reaction between Pb-rich surface of PbS QDs and dissociative S2- of polysulfide electrolyte, a relatively mild post-treatment was selected to produce a CdS capping layer by chemical bath deposition route using thiourea as the sources of sulfur. Vis-NIR absorption spectra was adopted to confirm the change of the size and size distribution of the absorbed PbS QDs. Finally, the optimized treatment led to a stable panchromatic solar cell with 2.67% conversion efficiency and short circuit photocurrent density of 15.14 mA cm(-2). (C) 2014 Published by Elsevier Ltd.
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