| Summary: | 碩士 === 龍華科技大學 === 工程技術研究所 === 100 === In this study, a new method to prepare nano materials used for solar cell has been successfully developed. The first part of this research used a hot wall, horizontal low pressure chemical vapor deposition system to grow zinc oxide nanowires. This LPCVD process use 1 cm2 copper nets, or zinc oxide buffer layers as substrates, nitrogen and oxygen as carrier gas, and the deposition temperature was 600℃. The second part of this research used LPCVD prepared ZnO based nanowires as the anode materials for self made dye synthesized solar cells. The output current oerformance has been systematically analyzed.
XRD and SEM results confirm that the LPCVD deposits were polycrystal, mixed phases of zinc oxide, iron oxide, and copper oxides. Densely distributed nanowires were frequently found for LPCVD over coppernets, with water vapot introduced, and mixtures of zinc acetylacetonate and copper acetylacetonate as reactants. Due to vapor-solid-liquid induced one dimensional growth, a diameter of 50 nm can be reached. The major ZnO orientations were (100), (002), (101), and (102).
The DSSC part of this study show that LPCVD grown zinc oxide nanowires can be used solar cell. Adding iron oxide to the ZnO nano phases cuased nanowire growth, and better performance for power out put. As compared with doped with 0.01 g, DSSC used ZnO nanowires grown from 0.1 g iron dope gave a current density of 0.66mA/cm2, such value is 40 % higher, while the output voltage is 0.71 V, also much better 0.01 g Fe doped samples.
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