Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Preparation of the ZnS-type Electroluminescent Phosphor Used in Flat Panel Display Field

WANG Wen-Deng, XIA Yu-Juan, WANG An-Bao, XU Fang-Fang, HUANG Fu-Qiang, LIN Xin-Ping   

  1. (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)
  • Received:2007-01-31 Revised:2007-04-03 Published:2008-01-20 Online:2008-01-20

Abstract: ZnS electroluminescent phosphors were prepared by high temperature (1100℃) solid state reaction, subsequently milling for some time (t=0-180min) and the final low temperature annealing process (750℃). The as-synthesized phosphors were characterized by X-ray powder diffraction, UV-Vis diffuse reflectance spectra, scanning electron microscope and photoluminescence spectra. Electroluminescence performance was investigated on the screen-printing electroluminescent lamp at 100V and 400Hz. Increased milling time leads to intensity reductions and width increases of some diffraction peaks, and results in slight red-shifts of the absorption edges. Photoluminescence brightness declines about 58% after milling for 180 min while electroluminescence brightness increases from 14.39cd/m2(t=0min) to the peak value 90.13cd/m2(t=160min). The changes of photoluminescence and electroluminescence performances originate from the defects in the microstructure induced by milling.

Key words: photoluminescence, electroluminescence, ZnS, milling

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