Abstract
SrS:Ce transparent thin film electroluminescent (EL) devices having a glass substrate and both-sides transparent ITO electrodes have been prepared by electron beam evaporation method. Ce^<3+> luminescence easily changed by deposition methods and conditions and has not been reproduced yet. In this study, we made efforts to reproduce bluish-green Ce^<3+> luminescence. The relation between Ce^<3+> luminescence and deposition atmosphere was investigated using a QMS (quadrupole mass spectroscopy) measurement. Bluish-green consistent Ce^<3+> luminescence with higher luminance and efficiency can be achieved for the SrS:Ce TFEL devices prepared in the atmosphere of both proper moisture atmosphere and excess sulfur supply. Maximum luminance, efficiency and CIE color coordinate are 340 cd/m^2, 0.15 lm/W and (0.18, 0.33), respectively.
