Low temperature synthesis of ZnO films

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ZnO is a promising material for ultraviolet optoelectronics, transparent electrodes, light emitting diodes, solar cells and so on. In this study, we have developed a simple synthesis method for ZnO nanorods without any calcination processes. This method enables the use of various substrates with low thermal stability.First, zinc oxide nanorods were synthesized by using the zinc/sodium dodecyle sulfate composite seed. Second, the morphology of the zinc oxide was controlled with the difference by using various alcohols as a solvent. The sheet-like ZnO films were synthesized when ethanol was used as a solvent. The ZnO nanosheet films had higher transparency and conductivity than that of ZnO nanorods. Third, mesoporous zinc oxide films were synthesized by using a triblock copolymer (Pluronic F127: EO106PO70EO106) as a soft template agent. Al or b-doped mesoporous ZnO films show high transparency and low sheet resistance (0.017 ohm cm).