Electrodeposition of Hierarchical ZnO Nanorod-Nanosheet Structures and   Their Applications in Dye-Sensitized Solar Cells

doi:10.1021/am2002789

CORC > 北京大学 > 工学院

	Electrodeposition of Hierarchical ZnO Nanorod-Nanosheet Structures and Their Applications in Dye-Sensitized Solar Cells
	Qiu, Jianhang ; Guo, Min ; Wang, Xidong
刊名	acs applied materials interfaces
	2011
关键词	hierarchical nanostructure ZnO crystal growth electrodeposition dye-sensitized solar cell LAYER-FREE ELECTRODEPOSITION ZINC-OXIDE CONVERSION EFFICIENCY NANOWIRE ARRAYS OPTICAL-PROPERTIES ENERGY-CONVERSION COATED GLASS THIN-FILMS NANOSTRUCTURES FABRICATION
DOI	10.1021/am2002789
英文摘要	We present a two-step electrochemical deposition process to synthesize hierarchical zinc oxide (ZnO) nanorod-nanosheet structures on indium tin oxide (ITO) substrate, which involves electrodeposition of ZnO nanosheet arrays on the conductive glass substrate, followed by electrochemical growth of secondary ZnO nanorods on the backbone of the primary ZnO nanosheets. The formation mechanism of the hierarchical nanostructure is discussed. It is demonstrated that annealing treatment of the primary nanosheets synthesized by the first-step deposition process plays a key role in synthesizing the hierarchical nanostructure. Photovoltaic properties of dye-sensitized solar cells (DSSCs) based on hierarchical ZnO nanostructures are investigated. The hierarchical ZnO nanorod-nanosheet DSSC exhibits improved device performance compared to the DSSC constructed using photoelectrode of bare ZnO nanosheet arrays. The improvement can be attributed to the enhanced dye loading, which is caused by the enlargement of internal surface area within the nanostructure photoelectrode. Furthermore, we perform a parametric study to determine the optimum geometric dimensions of the hierarchical ZnO nanorod-nanosheet photoelectrode through adjusting the preparation conditions of the first- and second-step deposition process. By utilizing a hierarchical nanostructure photoelectrode with film thickness of about 7 mu m, the DSSC with an open-circuit voltage of 0.74 V and an overall power conversion efficiency of 3.12% is successfully obtained.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000293196800030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; PubMed; 89; ARTICLE; 7; 2358-2367; 3
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/193550]
专题	工学院
推荐引用方式 GB/T 7714	Qiu, Jianhang,Guo, Min,Wang, Xidong. Electrodeposition of Hierarchical ZnO Nanorod-Nanosheet Structures and Their Applications in Dye-Sensitized Solar Cells[J]. acs applied materials interfaces,2011.
APA	Qiu, Jianhang,Guo, Min,&Wang, Xidong.(2011).Electrodeposition of Hierarchical ZnO Nanorod-Nanosheet Structures and Their Applications in Dye-Sensitized Solar Cells.acs applied materials interfaces.
MLA	Qiu, Jianhang,et al."Electrodeposition of Hierarchical ZnO Nanorod-Nanosheet Structures and Their Applications in Dye-Sensitized Solar Cells".acs applied materials interfaces (2011).