용매 증발법에 의한 YGdO3:Eu^3+ 형광체의 제조와 발광 특성

• 영문명: Synthesis and Luminescence Properties of YGdO_3:Eu^3+ Phosphor by Solvent Evaporation Method
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 이동규(Lee DongKyu) 전상배(Jeon SangBae) 이진화(Lee JinHwa)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제24권 제3호, 238~245쪽, 전체 8쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2007.09.30

영문 초록

Eu^3+ doped YGdO_3 phosphors particles which have fine size and narrow size distribution with non aggregated uniform morphology were prepared by solvent evaporation method for the improvement of emission efficiency. Several parameters have been investigated in this study such as the influences of composition ratio of host materials, calcination temperature, amount of activator, surfactant, pH and flux on the photoluminescence intensity, particle size and dispersion. Eu^3+ doped YGdO_3 phosphor presented a strong narrow band emission peak at 612nm. The maximum emission intensity ofYGdO_3:Eu^3+ occurred when Eu^3+ concentration is 3wt% under vacuum ultra violet excitation. Prepared phosphors were found to have small round-shaped particles about 150nm in size. The addition of PVA as a surfactant inhibits the grain growth and the agglomeration of particles efficiently by reducing the oxygen bridge bonds. As the pH reduces, PL intensity increase due to reducing the formation of oxygen bridge bonds. The particles prepared from solvent evaporation method with 5wt% LiCl were found to have 120% PL intensity compare to particles prepared without LiCl flux.

키워드

luminescence phosphorYGdO3:Eu solvent evaporation method