Ma Li, Zhong Guozhu, Xu Shaohong. THE EXCITATION PROCESS OF Tm ION IN ZnS:Tm THIN FILM ELECTROLUMINESCENCE[J]. Chinese Journal of Luminescence, 1985,6(3): 192-199
Ma Li, Zhong Guozhu, Xu Shaohong. THE EXCITATION PROCESS OF Tm ION IN ZnS:Tm THIN FILM ELECTROLUMINESCENCE[J]. Chinese Journal of Luminescence, 1985,6(3): 192-199DOI:
This paper first reports that the mechanism of electroluminescence(EL)excitation in ZnS:Tm thin film(TF)is different from that in ZnS:Er and ZnS:Tb TF.It appears that excitation energy transfers from some impure centers to Tm ions.The ZnS:Tm TF with ITO-Y
2
O
3
-ZnS:Tm-Y
2
O
3
-A1 structure is made by electron-beam evaporation.During the evaporation the vacuum pressure
the evaporation rate of ZnS:Tm layer
and the substrate temperature are 5×10
-5
torr
200Å/min
and 160℃-200℃ respectively.The optimum Tm
3+
ion concentration is approximately 2% by weight and the thickness of ZnS:Tm layer is in the range from 400nm to 600nm.