Study of emission efficiency in ac driven light emitter devices

R. Baca-Arroyo, A. Esparza-García, G. Romero-Paredes, R. Peña-Sierra

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A study of the high field emission efficiency in ZnS: Mn is presented. At intense electric field conditions the band bending resulting from space charge effects has not been considered since the space charge density in the active layer is low. We demonstrate that ac driven TFEL devices with large insulator capacitance and no space charge effects in the active layer are optimal in terms of providing the energy transfer from sensitizers to luminescent centers. The analysis takes into account the pair-producing mechanism by direct electron impact with a characteristic electron energy distribution described by the Wolff distribution function. From the described model for a typical structure, the emission efficiency behavior could be expressed by the relation between the minimum distances required by the emitted carriers to produce electron-hole pairs and ac drive conditions.

Original languageEnglish
Title of host publication2009 6th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2009
PublisherIEEE Computer Society
ISBN (Print)9781424446896
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 6th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2009 - Toluca, Mexico
Duration: 10 Nov 200913 Nov 2009

Publication series

Name2009 6th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2009

Conference

Conference2009 6th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2009
Country/TerritoryMexico
CityToluca
Period10/11/0913/11/09

Keywords

  • Ac driven
  • Emission efficiency
  • Energy transfer
  • ZnS

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