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Texture surfaces of ZnO:Al (AZO) films are prepared by ammonium acetate, a neutral etching agent. The structural, optical, and electrical properties of AZO films are investigated in detail for improving the light trapping ability. Under the optimal etching conditions (e.g., solution concentration of 5.0wt% and etching time of 20min), AZO films have a typical crater-like structure with haze values...
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