Transparent Al and Y codoped zinc oxide( Y-AZO) thin films were deposited by a sol-gel dip-coating method. The structure and properties of these films were characterized by X-ray diffraction,scanning electron microscopy /energy dispersive X-ray spectrometry,and UV-vis spectroscopy. The results proved: a hexagonal wurtzite structure was retained by Y-AZO films,while the doping ratio of Al was greater than or equal to the amount of Y and the annealing temperature was 500 ℃. The pure transparent thin film was ...