Improvement of crystal properties of SrS:Cu films for blue EL elements using rapid thermal annealing

抄録

Blue EL (electroluminescence) elements with double insulating layer structure have been prepared with an electron beam deposition. A blue emission is evolved from the SrS:Cu layer. A rapid thermal annealing process was applied to the EL elements to improve the crystal and emission properties. The XRD (X-ray diffraction) and PL (photoluminescence) data were greatly improved through this process. It was found that an optimum annealing condition was 2 min annealing time under the temperature at 450oC.