Boosting the efficiency of quantum dot sensitized solar cells up to 7.11% through simultaneous engineering of photocathode and photoanode

Bai, Yang, Han, Chao, Chen, Xinqi, Yu, Hua, Zong, Xu, Li, Zhen and Wang, Lianzhou (2015) Boosting the efficiency of quantum dot sensitized solar cells up to 7.11% through simultaneous engineering of photocathode and photoanode. Nano Energy, 13 609-619. doi:10.1016/j.nanoen.2015.04.002


Author Bai, Yang
Han, Chao
Chen, Xinqi
Yu, Hua
Zong, Xu
Li, Zhen
Wang, Lianzhou
Title Boosting the efficiency of quantum dot sensitized solar cells up to 7.11% through simultaneous engineering of photocathode and photoanode
Journal name Nano Energy
ISSN 2211-2855
2211-3282
Publication date 2015-04-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.nanoen.2015.04.002
Open Access Status
Volume 13
Start page 609
End page 619
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
We demonstrate a new strategy of boosting the efficiency of quantum dot sensitized solar cells (QDSSCs) by engineering the photocathode and photoanode simultaneously. Nanostructured photocathodes based on non-stoichiometric Cu2−xSe electrocatalysts were developed via a simple and scalable approach for CdS/CdSe QDs co-sensitized solar cells. Compared to Cu2S CE, remarkably improved photovoltaic performance was achieved for QDSSCs with Cu2−xSe CEs. The superior catalytic activity and electrical conductivity of Cu2−xSe CEs were verified by the electrochemical impedance spectra and Tafel-polarization measurements. To maximize the efficiency enhancement, the photoanodes were optimized by introducing a pillared porous titania composite as the scattering layers for further light harvesting and charge transfer improvement concurrently. The combination of effective Cu2−xSe electrocatalysts and pillared titania scattering layers contributed to one of the best reported efficiencies of 7.11% for CdS/CdSe QDs co-sensitized solar cells.
Keyword Cu2-xSe photocathode
Porous titania photoanode
Efficiency
Quantum dot sensitized solar cells
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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