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P‐50: Morphology and Luminescence Property of Gd 2−x Y x O 3 :Li, Eu (0.0 × 0.8), Red‐Phosphor with High Efficiency at Low Voltages
Author(s) -
Byeon SongHo,
Ko MiGyeong,
Park JungChul,
Kim DongKuk,
Suh KyungSoo
Publication year - 2001
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1831970
Subject(s) - phosphor , cathodoluminescence , luminescence , analytical chemistry (journal) , photoluminescence , materials science , solid solution , mineralogy , chemistry , optoelectronics , metallurgy , chromatography
The single phased Gd 2−x Y x O 3 :Li, Eu solid‐solution was successfully prepared by a citrate method at 650. Such a temperature is much lower than the typical solid‐state reaction or spray pyrolysis temperature (> 1300). However, additional heat treatment up to 850 ∼ 900 was required to obtain the optimum optical properties. Photoluminescence (PL), cathodoluminescence (CL), and morphology of Gd 2−x Y x O 3 :Li, Eu system were compared as a function of x values. The PL and particularly CL emission intensities at low‐voltages (< 1 kV) of this solid‐solution were 50 ∼ 80 % higher than those of commercial red phosphor Y 2 O 3 :Eu in the range of 0.0 × 0.8. This phosphor material appears to be very promising for field emission display (FED) because the particle size and shape are easily controlled at low temperature (900) by the change of Y or Li contents without any significant loss of brightness.