Cathodoluminescence properties of Pr~(3+)-doped perovskite-type transparent red luminescent thin films processed by a sol-gel method

摘要

Transparent, luminescent films of Pr~(3+)-doped (Ca_(0.65)Sr_(0.4))TiO3 (CSTO) have been prepared for cathodo-excitation of pure red luminescence by a sol-gel method from a stabilized sol with Ca~(2+), Sr~(2+), Pr~(3+) ions and tita-nium-isopropoxide in acetic acid. The structure and surface morphology of the obtained films are characterized by X-ray diffraction and Atomic Force Microscopy, respectively. The photoluminescence and cathodoluminescence (CL) properties of the films are evaluated. The films exhibit a strong single line of ~1D2 → ~3H4 red photoluminescence of Pr~(3+) ions doped, which increases almost linearly with the number of the dip-coated layers. It is also found that strong single red photoemission is observed and the CL intensity increases with increasing acceleration voltage. The results demonstrate that it is potential for application in field-emission display devices.