Thermal Cracking Effects of CeCl₃ Dopant on Blue Electroluminescent Properties in SrGa₂S₄:Ce Thin Films

The thermal cracking effects of CeCl 3 dopant on the blue electroluminescent (EL) properties in SrGa 2 S 4 :Ce thin films grown by molecular beam epitaxy (MBE) system were investigated. The cracking enhanced the Ce 3+ ion density in SrGa 2 S 4 :Ce film without degrading the crystallinity. The maximum EL luminance was thereby increased to 85 cd/m 2 at a driving frequency of 1 kHz. The chromaticity of the EL was also maintained in the pure blue region.