Laser induced white emission generated by infrared excitation from Eu:SrCeO nanocrystals.

The laser induced white emission (LIWE) was observed from Eu:SrCeO nanocrystals. The samples were obtained in form of powders by the modified sol-gel route. The structure and morphology of the phosphors were investigated by powder X-ray diffraction and transmission electron microscope techniques. The intense LIWE occurred under reduced pressure and focused beam of near infrared laser excitation. The power and pressure dependencies exhibit evident threshold character typical for the avalanche effect. The photoconductivity of the Eu:SrCeO nanocrystals measured as a function of different powers of excitation source was analyzed.