ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A bright white-light electroluminescence (EL) is obtained in a SrS:Pr,K thin-film EL device. The device shows a luminance level of 500 cd/m2 with 1 kHz drive (1500 cd/m2 at 5 kHz), which is five times as high as that obtained for a ZnS:Pr,F thin-film EL device. The dominant EL excitation mechanism in the SrS:Pr,K device responsible for a higher EL efficiency is ascribed to a process wherein the ionization of the luminescent center occurs first. Subsequent recombination with an electron follows in which the Pr3+ center reaches a (4 f )2 excited state through a (4 f )(5d) excited state. Finally, luminescence due to the relaxation of the (4 f )2 electron configuration of the Pr3+ ion arises.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.99548
