The ZnO thin films were fabricated on corning eagle 2 000 substrate by ultrasonic spray pyrolysis(USP).The zinc acetate dehydrate was used as source material.By investigating the pH of the initial solution,the structure,surface morphology,electrical and optical properties of the ZnO thin films,it is found that the acetic acid has great effect on the growth rate of ZnO thin films.According to XRD and SEM test results,all samples we obtained are hexagonal wurtzite structure oriented in the(002) cr...