Title :
Effect of bulk space charge on the current and luminescence characteristics of ZnS:Mn ACTFEL display devices
Author :
Singh, Vijay P. ; Majid, Wan Z. ; Morton, David C.
Author_Institution :
Dept. of Electr. Eng., Texas Univ., El Paso, TX, USA
Abstract :
Analysis of ZnS:Mn ACTFEL (AC thin-film electroluminescent) devices with a deep level in the bulk of the phosphor layer was performed. Both donor-type and acceptor-type levels were considered. A trailing edge peak in luminescence waveform appears when the interface state level energy (E/sub CD/) is reduced to 0.5 eV. Under certain conditions, an acceptor-type bulk level can lead to oscillations in the device current. A reasonable match between theoretical and experimental luminescence waveforms could be obtained for E/sub CD/=0.88 eV. However, theory and experiment could not be matched simultaneously at three different drive conditions. Further refinement of the model is necessary for predicting the ACTFEL device response for all drive conditions.<>
Keywords :
II-VI semiconductors; electroluminescent displays; manganese; thin film devices; zinc compounds; 0.5 eV; AC thin film electroluminescent devices; ACTFEL display devices; ZnS:Mn; bulk space charge; interface state level energy; luminescence characteristics; luminescence waveform; luminescence waveforms; model; trailing edge peak; Displays; Electron traps; Energy capture; Energy states; Interface states; Luminescence; Phosphors; Space charge; Thermal conductivity; Zinc compounds;
Conference_Titel :
Display Research Conference, 1991., Conference Record of the 1991 International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-0213-3
DOI :
10.1109/DISPL.1991.167450
