The Application of Titanium as Photoelectrode Substrate Utilizing in Dye Sensitized Solar Cells

• Main Authors: Ting-Ya Tsai, 蔡婷雅
• Other Authors: Chih-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/76574275170345278514

碩士 === 中興大學 === 化學工程學系所 === 99 === In this study, titanium (Ti) was selected as photoanode substrate, and the H2O2 (hydrogen peroxide) pretreatment is performed on a Ti foil as an efficient photoanode substrate for DSSCs. The Ti surface was etched by the H2O2 solution, resulting in the formation of porous TiO2 nanostructure, which increase the contact area between screen-printed TiO2 nanoparticles and Ti substrate. Here, we introduce the H2O2 etching approach to form a robust and porous TiO2 nanostructures which directly formed on the Ti substrates, therefore the adherence was promoted. Moreover, the porous TiO2 nanostructures were vertically oriented to Ti substrate and provide electron transfer, injection, and collection from TiO2 nanoparticles to Ti substrate. Therefore it was improved by the reduced R1 resistance (charge transfer resistance) on the photoanode and the electron lifetime was prolong. Compared with DSSCs based on non-treated Ti photoanode, DSSCs with this H2O2 oxidation/etching Ti photoanode exhibits a remarkable increase in short-circuit current density (from 8.55 to 16.43 mA/cm2) as well as light- to- electricity conversion efficiency (from 4.68 to 7.42 %) under AM 1.5 back-side illumination.