Sun Jiaming, Zhong Guozhu, Fan Xiwu, Zheng Chenwei. EFFECT OF THE SUBSTRATE TEMPERATURE ON BRIGHTNESS OF CaS:TbF<sub>3</sub> ELECTROLUMINESCENT THIN FILMS[J]. Chinese Journal of Luminescence, 1998,19(1): 36-40
Sun Jiaming, Zhong Guozhu, Fan Xiwu, Zheng Chenwei. EFFECT OF THE SUBSTRATE TEMPERATURE ON BRIGHTNESS OF CaS:TbF<sub>3</sub> ELECTROLUMINESCENT THIN FILMS[J]. Chinese Journal of Luminescence, 1998,19(1): 36-40DOI:
EFFECT OF THE SUBSTRATE TEMPERATURE ON BRIGHTNESS OF CaS:TbF3 ELECTROLUMINESCENT THIN FILMS
The crystallinity and morphology of crystalline grains were studied on CaS:TbF
3
electroluminescent thin films prepared by electron beam evaporation under different substrate temperatures from 220 to 580℃.The brightness of the electroluminescence strongly increased with increasing the substrate temperatures.X-ray diffraction analysis indicated that the CaS:TbF
3
films were polycrystalline with cubic phase.The surface morphology of the films
the decrease of the diffuse reflectance and the increase of transmittance indicated that the CaS:TbF
3
films became denser with increasing the substrate temperatures.These changes reduce scattering to hot electrons and finally caused a strong increase of the electroluminescent brightness by increasing hot electrons energy in CaS:TbF
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