Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/246368
Title: Fabrication of TiO2 nanofiber nanoparticle composites for efficient dyesensitized solar cells DSSCs
Researcher: Anjusree GS
Guide(s): Sreekumaran Nair.A and Shantikumar V Nair
Keywords: 
Physical Sciences,Multidisciplinary,Nanoscience and Nanotechnology
Renewable Energy - Solar Energy; Photovoltaic Technologies;Electrolyte
University: Amrita Vishwa Vidyapeetham (University)
Completed Date: 01/2019
Abstract: Dye-sensitized solar cell (DSSC) is a promising technology for renewable energy owing to its relatively inexpensive materials and simple fabrication processes involved. The important parameters responsible for high photoelectric conversion efficiency of DSSCs are the light harvesting efficiency of the dye, the efficiency of electron transfer from the excited dye molecules to the photoanode (depends on the effective chemical conjugation of the dye and the TiO2) and the charge transport through the photoanode. The conventional photoanode made of TiO2 nanoparticles (10-30 nm) are beneficial for good mass loading of TiO2 (because of their high packing density) and hence high dye-loading but inferior in light scattering due to their smaller sizes compared to the wavelength of the incident light. Moreover, the photoanode film made of polycrystalline TiO2 nanoparticles usually have alarge number of structural defects (such as dead-ends in the array of their films, crystal defects, etc.) and grain boundaries (being polycrystalline) which would introduce surface trap sites for recombination in the conduction band of TiO2. In order to improve the charge collection efficiency of a DSSC, considerable research has been done on 1-D (one-dimensional) nanomaterials such as nanofibers, nanowires, nanorods, nanotubes, etc. which contain a lesser number of recombination centres thus providing directional channels for electron transport. Though these nanostructures provide good light scattering property mostly in the red part of the solar spectrum, the internal surface areas of these nanostructures are lower than that of the nanoparticles thus resulting in lower dye-loading and hence lower efficiency for the devices. (abstract attached)
Pagination: xxi, 112
URI: http://hdl.handle.net/10603/246368
Appears in Departments:Amrita Centre for Nanosciences and Molecular Medicine

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01_title.pdfAttached File168.46 kBAdobe PDFView/Open
02_declaration.pdf186.33 kBAdobe PDFView/Open
03_certificate.pdf229.26 kBAdobe PDFView/Open
04_contents.pdf145.39 kBAdobe PDFView/Open
05_acknowledgement.pdf129.49 kBAdobe PDFView/Open
06_abstract.pdf71.67 kBAdobe PDFView/Open
07_abbreviation.pdf189.28 kBAdobe PDFView/Open
08_list of figure.pdf148.96 kBAdobe PDFView/Open
09_list of tables.pdf64.6 kBAdobe PDFView/Open
10_chapter 1.pdf1.67 MBAdobe PDFView/Open
11_chapter 2.pdf466.69 kBAdobe PDFView/Open
12_chapter 3.pdf2.67 MBAdobe PDFView/Open
13_chapter 4.pdf146.59 kBAdobe PDFView/Open
14_references.pdf218.06 kBAdobe PDFView/Open
15_publications.pdf179.98 kBAdobe PDFView/Open


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