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An investigation on photoluminescence and AC powder electroluminescence of ZnS:Cu,Cl,Mn,Te phosphor

Published online by Cambridge University Press:  12 September 2011

Bong Je Park
Affiliation:
Basic Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-600, Republic of Korea; and Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
Hong Seok Seo
Affiliation:
Basic Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-600, Republic of Korea
Joon Tae Ahn
Affiliation:
Basic Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-600, Republic of Korea
Jung Ho Song
Affiliation:
Basic Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-600, Republic of Korea
Woon Jin Chung
Affiliation:
Division of Advanced Materials Engineering, Kongju National University, Cheonan 22-717, Republic of Korea
Duk Young Jeon
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
Corresponding
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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 4T16A1 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 CuxS–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.

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Copyright © Materials Research Society 2011

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