The effect of AZO and compact TiO2 films on the performance of dye-sensitized solar cells

• Main Authors: Huang, Hsin-Hsiang, 黃信祥
• Other Authors: Hsu, Chun-Yao
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/73939000848417307602

碩士 === 龍華科技大學 === 機械工程系碩士班 === 103 === A thin TiO2 compact layers and inexpensive Al2O3-doped zinc oxide (in AZO, the Al2O3 contents are approximately 3 wt.%) transparent conducting films, by means of radio frequency (rf) magnetron sputtering, using deposition parameters that ensure higher photo catalytic activity and increased dye-sensitized solar cells (DSSC) conversion efficiency. Findings based on the grey relational Taguchi method, the lowest electrical resistivity of AZO/glass films to be about 3.4 mΩ-cm, and visible range optical transmittance about 88%. By applying annealing, the AZO films show decreased electrical resistivity due to there is an increase in the Hall mobility and the carrier concentration. With a thin TiO2 compact layer (40, 70, 100 nm) to prevent charge recombination, a higher short circuit current density is obtained. The experimental results show that the DSSC conversion efficiency is critically affected by the thickness of the compact TiO2 layer.