Title :
Stability evaluation of UV-exposure on multiple dye/nano-TiO2 layers
Author :
Liau, Leo Chau-Kuang ; Chiang, Po-I
Author_Institution :
Dept. of Chem. Eng., Yuan-Ze Univ., Chung-li
Abstract :
A device of multiple nano-TiO2 layers was proposed and fabricated to prevent great damage of a dye/nano-TiO2 region in the dye-sensitized solar cells (DSC) from photodegradation. The top of the dye/TiO2 region was designed to be coated with sol-gel nano-TiO2 thin films against UV irradiation to alleviate the photodegradation effect. The sol-gel TiO2 was prepared in a low temperature (75 M) and verified as nano-sized particles and an anatase crystalline structure. The samples of different layers fabricated using different compositions of nano-TiO2 were prepared and exposed for UV-irradiation tests. Results show that the presence of the sol-gel TiO2 films coated on top of the dye/TiO2 region can significantly protect the dye photo-degradation from UV irradiation. This multi-layer device can effectively improve the photo-stability of the dye in a UV-exposure environment
Keywords :
dyes; nanostructured materials; semiconductor materials; sol-gel processing; solar cells; titanium compounds; ultraviolet radiation effects; TiO2; UV irradiation; anatase crystalline structure; dye-sensitized solar cells; multilayer device; multiple dye layers; multiple nanolayers; nanosized particles; photodegradation; sol-gel nanothin films; Crystallization; Fabrication; Lighting; Nanoscale devices; Photovoltaic cells; Solar power generation; Stability; Temperature; Thermal degradation; Transistors;
Conference_Titel :
Photovoltaic Energy Conversion, Conference Record of the 2006 IEEE 4th World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
1-4244-0017-1
Electronic_ISBN :
1-4244-0017-1
DOI :
10.1109/WCPEC.2006.279777
