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Rare earth element(Er,Pr)를 doping한 ZnS:Ag 螢光體의 PL現象에 關한 硏究
양동익,신영진,이용택 全北大學校 科學敎育硏究所 1981 과학과 과학교육 논문지 Vol.6 No.-
The photoluminescent ZnS: Ag(Er, Pr) phosphors are prepared by firing at 850℃ in N, gas of atmospheric pressure for an hour. They are doped with (1) an activator Ag_2S (2) both sensitizer Ag_2S and each different activators Ercl_3, Prcl_3. The crystal structure of ZnS: Ag(Er, Pr) phosphor powder is the mixed phase of cubic and hexagonal. The photoluminescent cells are made with those phosphors and their emission spectra are measured at room temperature after these materials are excited with 3650 A˚(3, 4eV) light. The following results are also observed about ZnS: Ag (Er Pr) phosphors. (1) PL spectrum intensity of ZnS: Ag phosphors doped Er, Pr as ratio 10^-2 mole/mole ZnS is stronger than that of ZnS phosphors doped Er, Pr as ratio 10^-4 mole/mole ZnS. (2) As increase addional ratio of rare earth element, PL spectral peak of ZnS: Ag phosphor moved in short wave length. (3) PL spectrum intensity of ZnS: Ag phosphors are apeared differently for various impurity (Ag, Er, Pr).