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학술지 An Investigation on Photoluminescence and AC Powder Electroluminescence of ZnS:Cu,Cl,Mn,Te Phosphor
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박봉제, 서홍석, 안준태, 송정호, 정운진, 전덕영
Journal of Materials Research, v.26 no.18, pp.2394-2399
Materials Research Society (MRS)
11MB1300, 반도체 나노구조를 이용한 펌핑용 10 W급 광원기술, 송정호
ZnS:Cu,Cl,Mn,Te, which shows red AC powder electroluminescence (ACPEL) emission, was synthesized using a conventional wet synthesis and a sealed vessel method. The photoluminescence (PL) and ACPEL were characterized. After the second firing, 0.5 wt% tellurium (Te)-doped ZnS:Cu,Cl,Mn,Te phosphor shows almost red PL emission from the 4T1-6A 1 transition of Mn2+ ions, which are affected by the Te. Extended x-ray absorption fine structure analysis on the Mn K edge proved that the substitution of sulfur (S) with Te changes the local crystal field of the Mn2+ ions and shifts an orange emission (~588 nm) to a red emission (~650 nm). A red ACPEL emission is first shown in 0.5 wt%Te-doped ZnS:Cu,Cl,Mn,Te after the third firing phosphor even though its luminance is not very high. The origin of the ACPEL emission is assumed to be not a Cu xS-ZnS p-n junction but a CuxTe-ZnS p-n junction. Raman spectra were characterized to support that the red ACPEL emission is probably attributed to a CuxTe-ZnS p-n junction. © 2011 Materials Research Society.
KSP 제안 키워드
Crystal field, Doped ZnS, P-N junction, PL emission, Petri net(PN), Raman spectra, Structure Analysis, Wet synthesis, extended X-ray absorption fine structure, materials research, orange emission