Characteristics of Zns:Mn Thin Film Electroluminescences Prepared by a Repeated Deposition of Hot Wall Method

Hot Wall 법의 반복 증착에 의해 제작한 ZnS:Mn 박막 엘렉트로루미네센스의 특성

  • 이상태 (한국해양대학교 운항시스템공학부)
  • Published : 2001.12.01

Abstract

A new technique to grow a manganese-doped zinc-sulfide(ZnS:Mn) has been proposed using the repeated deposition of the Hot Wall method. The optical characteristics and crystallinity for the ZnS and ZnS:Mn thin films deposited on a quartz glass substrate by the method were investigated. Also, The ZnS:Mn thin film elcetroluminescent devices were fabricated by the method to study luminescence characteristics. All films showed (111)-oriented cubic structure. By the repeated deposition, the deposition rates were decreased, and the optical characteristics and crystalline properties were improved, which clarifies that the method is effective to deposit the thin films with good crystallinity Futhermore, the crystallinity was more improved by the doping of Mn. Only one peak emission at around 585nm originating from Mn luminescent center is observed In the photoluminescent and electroluminescent spectra of ZnS:Mn films and the luminance of the ZnS:Mn-based thin film electroluminescent devices was obtained below 60cd/$m^2$ . The optical and crystalline properties, luminescence characteristics are discussed in terms of the effects of the repeated deposition and Mn-doping.

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