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Hydrothermal growth of double-layer TiO2 nanostructure film for quantum dot sensitized solar cells

Hydrothermal growth of double-layer TiO2 nanostructure film for quantum dot sensitized solar cells

Authors :
Gen Li
Jiansheng Zhang
Ming Liu
Jiangying Peng
Shuanglong Feng
Qiongzhen Liu
Junyou Yang
Hu Zhu
Source :
Thin Solid Films. 520:2745-2749
Publication Year :
2012
Publisher :
Elsevier BV, 2012.

Abstract

A double-layer (DL) film with a TiO2 nanosheet-layer on a layer of TiO2 nanorod-array, was synthesized on a transparent conductive fluorine-doped tin oxide substrate by a two-step hydrothermal method. Starting from the precursors of NaSeSO3, CdSO4 and the complex of N(CH2COOK)3, CdSe quantum dots (QDs) were grown on the DL-TiO2 substrate by chemical bath deposition method. The samples were characterized by X-ray diffraction, Scanning electron microscopy, Energy dispersion spectroscopy, and their optical scattering property was measured by light reflection spectrometry. Some CdSe QDs sensitized DL-TiO2 films serve as the photoanodes, were assembled into solar cell devices and their photovoltaic performance were also characterized. The short circuit current and open-circuit voltage of the solar cells range from 0.75 to 4.05 mA/cm2 and 0.20 − 0.42 V under the illumination of one sun (AM1.5, 100 mW/cm2), respectively. The photocurrent density of the DL-TiO2 film is five times higher than that of a bare TiO2 nanorod array photoelectrode cell.

Details

ISSN :
00406090
Volume :
520
Database :
OpenAIRE
Journal :
Thin Solid Films
Accession number :
edsair.doi...........87713a525fda49974dd4a9496eb41704
Full Text :
https://doi.org/10.1016/j.tsf.2011.11.080