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Frontiers of Optoelectronics

Front Optoelec    2013, Vol. 6 Issue (4) : 413-417     DOI: 10.1007/s12200-013-0353-7
RESEARCH ARTICLE |
High efficiency monobasal solid-state dye-sensitized solar cell with mesoporous TiO2 beads as photoanode
Heng WANG, Peng XIANG, Mi XU, Guanghui LIU, Xiong LI, Zhiliang KU, Yaoguang RONG, Linfeng LIU, Min HU, Ying YANG, Hongwei HAN()
Michael Gr?tzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
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Abstract

A monobasal solid-state dye-sensitized solar cell (ssDSC) with mesoporous TiO2 beads was developed and an efficiency of 4% was achieved under air mass (AM) 1.5 illumination. Scattering properties and electron diffusion coefficients of TiO2 mesoporous beads and P25 nano-particles were investigated. The results show that TiO2 mesoporous beads display higher scatterance than P25 nano-particles, and TiO2 mesoporous beads have higher electron diffusion coefficients (2.86 × 10-5 cm2?s-1) than P25 nano-particles (2.26 × 10-5 cm2?s-1).

Keywords dye-sensitized solar cells (DSCs)      mesoporous beads      scattering      electron diffusion coefficients     
Corresponding Authors: HAN Hongwei,Email:hongwei.han@mail.hust.edu.cn   
Issue Date: 05 December 2013
 Cite this article:   
Heng WANG,Peng XIANG,Zhiliang KU, et al. High efficiency monobasal solid-state dye-sensitized solar cell with mesoporous TiO2 beads as photoanode[J]. Front Optoelec, 2013, 6(4): 413-417.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-013-0353-7
http://journal.hep.com.cn/foe/EN/Y2013/V6/I4/413
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Heng WANG
Peng XIANG
Zhiliang KU
Mi XU
Guanghui LIU
Xiong LI
Yaoguang RONG
Linfeng LIU
Min HU
Ying YANG
Hongwei HAN
Fig.1  Schemed structure of ssDSC based on mesoporous TiO beads. Spiro-MeOTAD is filled in the pores of the mesoporous TiO beads layer, ZrO insulating layer and carbon counter electrode layer
Fig.2  Low- and high-magnification SEM images of mesoporous TiO beads film. (a) Low magnification; (b) high magnification
deviceJSC/(mA?cm-2)VOC/mVFFη/%
1(P25)3.247850.491.24
2 (Beads)6.728280.593.29
3(P25)6.317870.623.1
4 (Beads)7.288460.654.0
Tab.1  Summary of the photovoltaic performance at an illumination intensity of one sun (AM1.5 global, 100 mW?cm). Devices 1 and 3 are based on P25 titania electrodes. Devices 2 and 4 are based on mesoporous TiO beads electrodes. For devices 3 and 4 the TiO electrodes are both treated with TiCl aqueous solution. For devices 1 and 2, the TiO electrodes are not treated with TiCl aqueous solution. (: short circuit current density, : open circuit potential, : fill factor and : conversion efficiency)
Fig.3  Photocurrent density-voltage curve (a) and IPCE spectra (b) of ssDSCs based on mesoporous TiO beads and P25 titania electrode with TiCl treatment
Fig.4  IMPS (a) and IMVS (b) of ssDSCs based on mesoporous TiO beads and P25 titania electrode
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