Development of ZnO Nano-rod and TiO2 Compact Layer by Liquid Phase Deposition for Dye Sensitized Solar Cell

• Main Author: 邱士平
• Other Authors: HUANG, JUNG-JIE
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/6qwc4x

博士 === 大葉大學 === 電機工程學系 === 105 === The purpose of this study is to prepare zinc oxide (ZnO) nano-rod via the low temperature hydrothermal method for the application as working electrodes in dye-sensitized solar cells. Zinc nitrate and hexamethylenetetramine were used as starting materials for exploring the characteristics of the ZnO nanorod’s growth in zinc nitrate of varying concentrations. When the zinc nitrate was in the concentration of 0.05 M, the deposited ZnO nanorod had the best crystallization characteristics in its growth along the c-axis while the high specific surface area provided by the gaps in the rod could increase the dye absorption area. The dye-sensitized solar cell with the ZnO nanorod achieved a photocurrent density of 1.89 mA/cm2 and a photoelectric conversion efficiency of 0.43%. To further improve the cell’s efficiency, a titanium dioxide (TiO2) compact layer was prepared on a transparent conductive glass via the liquid phase disposition (LPD) for the purpose of blocking the interfacial electron recombination reaction between the conductive layer and the electrolyte. A mixed solution of hexafluorotitanate (0.2 M) and boric acid (0.5 M) was used for modifying the thickness of the compact layer by varying the disposition duration and further exploring how the thickness of the compact layer affected the dye-sensitized solar cell. When the TiO2 compact layer was in the thickness of 53 nm, the interfacial resistance was the lowest and the cell’s photocurrent density increased from 1.89 to 2.59 mA/cm2, which was able to improve the component’s photoelectric conversion efficiency from 0.43 to 0.75%.