Title :
Luminescent properties of blue-emitting CaS:Cu,F thin films
Author :
Nakanishi, Y. ; Kawasumi, A. ; Aoki, T. ; Tatsuoka, H. ; Kuwabara, H. ; Hatanaka, Y.
Author_Institution :
Res. Inst. of Electron., Shizuoka Univ., Japan
Abstract :
Structural and luminescent properties of CaS:Cu,F thin films prepared by the electron beam evaporation have been investigated. The film annealed at higher than 750°C showed [110] orientation and the crystallinity of the film was improved with increasing annealing temperature. The annealed films showed spectra with peaks at 435 and 450 nm and broad emission at longer wavelength at room temperature, and the 435 nm emission became dominant by the annealing at temperatures higher than 750°C. It was suggested from the measurement of the time-resolved emission spectra that the blue luminescence of not only the phosphor but also the film is not due to D-A pair recombination but due to the intraionic transition in the Cu+ ion
Keywords :
X-ray diffraction; annealing; calcium compounds; copper; electroluminescence; electroluminescent displays; electron beam deposition; fluorine; optical films; phosphors; photoluminescence; time resolved spectra; 435 nm; 450 nm; 600 to 800 C; CaS:Cu,F; Cu+ ion; X-ray diffraction; [110] orientation; annealing temperature; blue-emitting thin films; broad emission; crystallinity; electroluminescence; electron beam evaporation; full colour TFEL displays; intraionic transition; luminescent properties; phosphor; photoluminescence; structural properties; time-resolved emission spectra; Annealing; Argon; Content addressable storage; Electron beams; Luminescence; Phosphors; Substrates; Temperature; Transistors; X-ray scattering;
Conference_Titel :
Information Display, 1999. ASID '99. Proceedings of the 5th Asian Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
957-97347-9-8
DOI :
10.1109/ASID.1999.762714
