Effect of multilayered SrSSrS: CeSrS phosphor prepared by multi-source deposition method on the thin film electroluminescent devices

Y. H. Lee, D. H. Kim, B. K. Ju, T. H. Yeom, T. S Hahn, M. H. Oh, S. H. Choh

Research output: Contribution to journalArticlepeer-review

Abstract

Single-layer SrS: Ce and multilayer SrSSrS: CeSrS thin films have been grown by multi-source deposition method. The X-ray diffraction patterns of the films showed the typical diffraction patterns of the cubic SrS powder. Single-layer SrS: Ce thin films exhibited sulfur deficiency and their fluorescence spectra showed a broad red emission peak. The multilayer SrSSrS: CeSrS electroluminescent device showed nearly stoichiometric composition and an electroluminescent device made of these layers displayed a green-emission intensified spectrum with peaks located at 493 and 523 nm. A distinct S-shaped pinching effect in the transferred charge versus applied voltage characteristics, similar to a hysteretic electroluminescent device, was observed in multilayer device. We interpret that the separation of the light-emitting SrS: Ce layer from the two interfacial SrS layers and the resulting nonuniform space charge in the middle SrS: Ce layer are responsible for the observed enhancement of luminance through the intensified hysteretic effect in the multilayer structure.

Original languageEnglish
Pages (from-to)326-332
Number of pages7
JournalJournal of Crystal Growth
Volume147
Issue number3-4
DOIs
Publication statusPublished - 1995 Feb 1

Bibliographical note

Funding Information:
We would like to thank Y. Lee and S.G. Kim for the technical assistance in building the control unit for the MSD system. The cooperation by B.Y. Yu during the fluorescence experiments is gratefully acknowledged. This work has been supported by the Ministry of Science and Technology in Korea.

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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