Journal
OPTICS COMMUNICATIONS
Volume 346, Issue -, Pages 64-68Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2015.02.031
Keywords
SnO2; CdS; CdSe; Quantum dots-sensitized solar cells
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Funding
- Fundamental Research Funds for the Central Universities [JB-ZR1137]
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SnO2 nanoparticles were synthesized by hydrothermal method and applied to photo-electrodes of quantum dots-sensitized solar cells (QDSSCs). After sensitizing SnO2 films via CdS quantum dots, CdSe quantum dots was decorated on the surface of CdS/SnO2 photo-electrodes to further improve the power conversion efficiency. CdS and CdSe quantum dots were deposited by successive ionic layer absorption and reaction method (SILAR) and chemical bath deposition method (CBD) respectively. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to identify the surface profile and crystal structure of SnO2 photo-electrodes before and after deposited quantum dots. After CdSe co-sensitized process, an overall power conversion efficiency of 1.78% was obtained in CdSe/CdS/SnO2 QDSSC, which showed 66.4% improvement than that of CdS/SnO2 QDSSC. (C) 2015 Elsevier B.V. All rights reserved.
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