SrS∶HoF 3 thin film was prepared by double source method with electron beam evaporation. The fine structure of electroluminescence (EL) spectrum is found for the symmetry of the SrS∶HoF 3 thin film to be lower. Th...SrS∶HoF 3 thin film was prepared by double source method with electron beam evaporation. The fine structure of electroluminescence (EL) spectrum is found for the symmetry of the SrS∶HoF 3 thin film to be lower. The broadness of red peak is wider than that of ZnS∶HoF 3 thin film. Red EL emission in the SrS∶HoF 3 thin film comes from 5F 3 5I 7+ 5F 5 5I 8 transition. The intensity of blue and red emission increases obviously in the SrS∶HoF 3 EL spectrum and white EL is obtained. The EL mechanism of the SrS∶HoF 3 thin film is dominantly the energy transfer from the crystal host to luminescent centers by 4f 95d electrons.展开更多
The SrS∶HoF 3 Electroluminescent (EL) thin films are prepared at the different substrate temperature by electron beam evaporation. The crystallinity and EL characteristics of the samples are analyzed. It is found th...The SrS∶HoF 3 Electroluminescent (EL) thin films are prepared at the different substrate temperature by electron beam evaporation. The crystallinity and EL characteristics of the samples are analyzed. It is found that the main diffraction peak is (200) at the higher substrate temperature and the main diffraction peak is (111) at the lower substrate temperature. The blue emission intensity and EL brightness of the SrS∶HoF 3 thin films increase with the increase of the substrate temperature. Annealing the samples can change the cyrstal phase and strengthen the blue emission of EL thin film.展开更多
文摘SrS∶HoF 3 thin film was prepared by double source method with electron beam evaporation. The fine structure of electroluminescence (EL) spectrum is found for the symmetry of the SrS∶HoF 3 thin film to be lower. The broadness of red peak is wider than that of ZnS∶HoF 3 thin film. Red EL emission in the SrS∶HoF 3 thin film comes from 5F 3 5I 7+ 5F 5 5I 8 transition. The intensity of blue and red emission increases obviously in the SrS∶HoF 3 EL spectrum and white EL is obtained. The EL mechanism of the SrS∶HoF 3 thin film is dominantly the energy transfer from the crystal host to luminescent centers by 4f 95d electrons.
文摘The SrS∶HoF 3 Electroluminescent (EL) thin films are prepared at the different substrate temperature by electron beam evaporation. The crystallinity and EL characteristics of the samples are analyzed. It is found that the main diffraction peak is (200) at the higher substrate temperature and the main diffraction peak is (111) at the lower substrate temperature. The blue emission intensity and EL brightness of the SrS∶HoF 3 thin films increase with the increase of the substrate temperature. Annealing the samples can change the cyrstal phase and strengthen the blue emission of EL thin film.
