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An Investigation on Photoluminescence and AC Powder Electroluminescence of ZnS:Cu,Cl,Mn,Te Phosphor
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- Authors
- Bong Je Park, Hong Seok Seo, Joon Tae Ahn, Jung Ho Song, Woon Jin Chung, Duk Young Jeon
- Issue Date
- 2011-09
- Citation
- Journal of Materials Research, v.26, no.18, pp.2394-2399
- ISSN
- 0884-2914
- Publisher
- Materials Research Society (MRS)
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- Crystal field, Doped ZnS, Extended X-ray Absorption Fine Structure, P-N junction, PL emission, Petri net(PN), Raman Spectra, Structure Analysis, Wet synthesis, X-ray absorption fine structure(XAFS), materials research