標題: Controlled mechanical cleavage of bulk niobium diselenide to nanoscaled sheet, rod, and particle structures for Pt-free dye-sensitized solar cells
作者: Ibrahem, Mohammed Aziz
Huang, Wei-Chih
Lan, Tian-wey
Boopathi, Karunakara Moorthy
Hsiao, Yu-Chen
Chen, Chih-Han
Budiawan, Widhya
Chen, Yang-Yuan
Chang, Chia-Seng
Li, Lain-Jong
Tsai, Chih-Hung
Chu, Chih Wei
光電工程學系
Department of Photonics
公開日期: 2014
摘要: In this study, we report a one-step process for the preparation of NbSe2 nanosheets, nanorods and nanoparticles from pristine materials under the effects of shear and friction forces. Nevertheless, simple and facile methods for the large-scale syntheses of well-defined NbSe2 nanostructures in high yield have yet to be realized and that will have a great impact in a wide range of applications. For example, developing platinum (Pt)-free and highly efficient counter electrodes is meaningful and necessary for the cost reduction of dye-sensitized solar cells (DSSCs). By integrating this approach with a simple method of thin film preparation (spray coating) allowed us to prepare large-area, conductive, semitransparent flexible thin films of NbSe2. We have used microscopic and macroscopic methods to examine the morphologies, compositions, crystallinity, and electrical and optical properties of the converted NbSe2 nanostructures. DSSCs with NbSe2 nanosheet counter electrodes (CEs) achieved a conversion efficiency of 7.73%, superior to an efficiency of 7.01% for Pt-based CEs. Our NbSe2 nanostructure provides a cost-effective CE alternative to the noble metal Pt in DSSCs.
URI: http://hdl.handle.net/11536/24975
http://dx.doi.org/10.1039/c4ta01881h
ISSN: 2050-7488
DOI: 10.1039/c4ta01881h
期刊: JOURNAL OF MATERIALS CHEMISTRY A
Volume: 2
Issue: 29
起始頁: 11382
結束頁: 11390
顯示於類別:期刊論文


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