Improved luminance and efficiency of ZnS:Mn and GaN:Eu TDEL devices using PZT thick dielectric films

  • C. Munasinghe
  • , J. Heikenfeld
  • , R. Dorey
  • , R. Whatmore
  • , J. Bender
  • , J. Wager
  • , A. J. Steckl

Research output: Chapter in Book/Report/Conference proceedingsConference proceedingpeer-review

Abstract

Electroluminescent (EL) devices have traditionally utilized thin film dielectrics to provide the electrical isolation and high electric field across the phosphor layer. However, these so-called thin film electroluminescent (TFEL) devices require very stringent fabrication conditions and processes due to premature device breakdown caused by high field points in the thin insulating layers. The development of EL devices with thick dielectric layers (TDEL) has overcome this problem. However, initially the emission performance of TDEL devices was below that of TFEL devices. Recently, successful efforts have been made in the optimization of TDEL enhancing both luminance and power efficiency1. In this paper we report on the optimization of TDEL devices in both the phosphor material and the device structure. The TDEL device consists of a metal-insulator-semiconductor-insulator-metal (MISIM) stacked film structure built upon a transparent glass substrate (Fig. 1). The main phosphor materials used were ZnS:Mn and rare earth doped GaN. The ZnS:Mn, with a Mn concentration of 0.6 at.%, is deposited using magnetron sputtering whereas the GaN was grown in a solid source MBE system. Thin (100nm) strontium titanate (STO) films have been placed encapsulating the phosphor material. The STO films with high dielectric constant (εr-140) function as charge trapping dielectric layers in the TDEL device.

Original languageEnglish
Title of host publication2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages75-76
Number of pages2
ISBN (Electronic)0780381394, 9780780381391
DOIs
Publication statusPublished - 2003
EventInternational Semiconductor Device Research Symposium, ISDRS 2003 - Washington, United States
Duration: 10 Dec 200312 Dec 2003

Publication series

Name2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings

Conference

ConferenceInternational Semiconductor Device Research Symposium, ISDRS 2003
Country/TerritoryUnited States
CityWashington
Period10/12/0312/12/03

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