Optical and Electrical Properties of Thin Film Electroluminescent Devices with SrS:Cu, Ag Phosphor Layer

  • Chang, Ho-Jung (Department of Electrones Engineering, Dankook University, Cheonan-shi Chungnam) ;
  • Park, Jun-Seo (Department of Electrones Engineering, Dankook University, Cheonan-shi Chungnam) ;
  • Chang, Young-Chul (Department of Mechatronics, Korea University of Technology and Education, Byungchun-myon)
  • 발행 : 2002.03.01

초록

The SrS:Cu, Ag thin film electroluminescient devices were fabricated on $AlTiO_3$/ITO/glass substrates by electron-beam evaporation. The emission spectrum of the device was about 460 nm with $\chi$=0.20, y=0.29 in the CIE color coordinator. It was found that the emission spectrum was saturated to pure blue color when Ag sensitizer was doped in SrS:CuCl phosphors. The luminance of the device was increased by increasing the sulfur pressure. The measured luminance was saturated with 430 cd/$m^2$at the applied voltage of 90 V and the maximum luminance was 580 cd/$m^2$at 110V. The polarization charge and conduction charge of the devices were found to be found to be about $3.5\mu$C/$\textrm{cm}^2$ and $7.4\mu$C/$\textrm{cm}^2$, respectively.

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