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Mesoporous titania hollow spheres applied as scattering layers in quantum dots sensitized solar cells
Xu, Xueqing; Jiang, Guohui; Wan, Qingcui; Shi, Jifu; Xu, Gang; Miao, Lei
2012-10-15
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
Volume136Issue:2-3Pages:1060-1066
AbstractQuantum dots sensitized nanocrystalline TiO2 solar cells (QDSSCs) have attracted great attention for its promising prospects. In order to enhance the effective light absorption path length in the photoanode, a scattering layer is often applied on the back of the transparent absorption layer. Compared with conventional scattering layer films composed of 20 nm and 300 nm TiO2 nanocrystalline, submicrometer-size mesoporous TiO2 hollow spheres are of great interest due to its lower fabrication temperature and hierarchical pore structures. Here we present a novel solvothermal method to prepare mesoporous anatase TiO2 hollow spheres via a hydrophilic template/non-polar solvent interface reaction with carbon sphere as templates, which is easy to control the grain and pore size as well as the shell thickness of the hollow spheres. The TiO2 hollow spheres in average size of 320-330 nm have been applied as the scattering layer materials in CdSe QDSSCs grown by successive ionic layer adsorption and reaction, and a power conversion efficiency of ca. 3.2% has been obtained. The efficiency is higher by 28% than that of the QDSSCs with the scattering layers composed of 20 nm and 300 nm TiO2 particles due to its much higher optical reflectance and longer electron lifetime resulted from its fast diffusion of the electrolyte and lower CdSe loading in the scattering layer. It is indicated that high QDs loading in the scattering layers can cause the downwards displacement of the TiO2 conduction band and lead to lower electron lifetime for the QDSSCs with alkali polysulfide as electrolyte, which was different from the conventional dye-sensitized solar cells. (C) 2012 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordOxides Chemical Synthesis Microstructure Optical Properties Electrochemical Properties
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.matchemphys.2012.08.051
WOS Subject ExtendedMaterials Science
WOS KeywordTIO2 BEADS ; ELECTRODES
Indexed BySCI
Language英语
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000311865400111
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10575
Collection中国科学院广州能源研究所
AffiliationChinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Xu, Xueqing,Jiang, Guohui,Wan, Qingcui,et al. Mesoporous titania hollow spheres applied as scattering layers in quantum dots sensitized solar cells[J]. MATERIALS CHEMISTRY AND PHYSICS,2012,136(2-3):1060-1066.
APA Xu, Xueqing,Jiang, Guohui,Wan, Qingcui,Shi, Jifu,Xu, Gang,&Miao, Lei.(2012).Mesoporous titania hollow spheres applied as scattering layers in quantum dots sensitized solar cells.MATERIALS CHEMISTRY AND PHYSICS,136(2-3),1060-1066.
MLA Xu, Xueqing,et al."Mesoporous titania hollow spheres applied as scattering layers in quantum dots sensitized solar cells".MATERIALS CHEMISTRY AND PHYSICS 136.2-3(2012):1060-1066.
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