PREPARATION OF CAGA2S4-CE THIN-FILMS FOR BLUE-EMITTING THIN-FILM EL DEVICE

Authors
NAKANO F UEKURA N NAKANISHI Y HATANAKA Y SHIMAOKA G
Citation
F. Nakano et al., PREPARATION OF CAGA2S4-CE THIN-FILMS FOR BLUE-EMITTING THIN-FILM EL DEVICE, Applied surface science, 121, 1997, pp. 160-162
Citations number
4
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
Journal title
Applied surface science → ACNP
ISSN journal
01694332
Volume
121
Year of publication
1997
Pages
160 - 162
Database
ISI
SICI code
0169-4332(1997)121:<160:POCTFB>2.0.ZU;2-5
Abstract
Blue emitting thin-film electroluminescent (TFEL) devices with Ce3+-do ped calcium thiogallate (CaGa2S4:Ce) phosphor films have been prepared by multi-source deposition (MSD). Calcium (Ca), gallium(III) sulfide (Ga2S3) and cerium chloride (CeCl3) were employed as the source materi als. The thin film deposited at a substrate temperature of 550 degrees C with a Ga2S3/Ca flux ratio of 70 has a CaGa2S4 phase, but this film contained a gallium(II) sulfide (GaS) phase as well. The CaGa2S4:Ce t hin films were successfully prepared by carrying out the annealing in H2S atmosphere. The film annealed at 800 degrees C showed a bright blu e photoluminescence (PL) with peaks at around 460 and 510 nm. (C) 1997 Elsevier Science B.V.