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Luminescent Characteristics of Tb Doped Al2 O 3 Films Deposited by Spray Pyrolysis

Aluminum oxide films doped with Tb have been deposited by the spray pyrolysis technique on either plain or conductive oxide coated glass substrates at temperatures in the range of 270-450 o C. The photoluminescence emission from these films shows well-defined peaks at 490 and 550 nm, which are associated with Tb transitions, and a broad peak centered at 430 nm. The relative intensity of these peaks is strongly dependent on the type of substrate, the substrate temperature during deposition, and the amount of Tb incorporated in the film