냉 음극 형광 램프용 Y2O3 : Eu3+ 적색 형광체에 대한 이종 Flux 혼합첨가의 영향 (Effect of Different Fluxes in Preparation of Y2O3 : Eu3+ Red Phosphor Used for Cold Cathode Fluorescence Lamp)

서지정보

· 발행기관 : 한국재료학회
· 수록지 정보 : 한국재료학회지 / 19권 / 3호 / 163 ~ 168페이지
· 저자명 : 구자인, 김상문, 신학기, 박홍채, 윤석영

초록

Eu3+ -doped Y2O3 red phosphor was synthesized in a flux method using the chemicals Y2O3, Eu2O3, H3BO3 and BaCl2·2H2O. The effect of a flux addition on the preparation of Y2O3:Eu3+ red phosphor used as a cold cathode fluorescence lamp was investigated. H3BO3 and BaCl2·2H2O fluxes were used due to their different melting points. The crystallinity, thermal properties, morphology, and emission characteristics were measured using XRD, TG-DTA, SEM, and a photo-excited spectrometer. Under UV excitation of 254nm, Eu2O3 3.7mol% doped Y2O3 exhibited a strong narrow-band red emission, peaking at 612nm. From this result, the phosphor synthesized by firing Y2O3 with 3.7mol% of Eu2O3, 0.25mol% of H3BO3 and 0.5mol% of BaCl2·2H2O fluxes at 1400℃ for 2 hours had a larger particle size of 4mm on average compared to the phosphor of the H3BO3 flux alone. In addition, a phosphor synthesized by the two fluxes together had a rounder corner shape, which led to the maximum emission intensity.

영어초록

Eu3+ -doped Y2O3 red phosphor was synthesized in a flux method using the chemicals Y2O3, Eu2O3, H3BO3 and BaCl2·2H2O. The effect of a flux addition on the preparation of Y2O3:Eu3+ red phosphor used as a cold cathode fluorescence lamp was investigated. H3BO3 and BaCl2·2H2O fluxes were used due to their different melting points. The crystallinity, thermal properties, morphology, and emission characteristics were measured using XRD, TG-DTA, SEM, and a photo-excited spectrometer. Under UV excitation of 254nm, Eu2O3 3.7mol% doped Y2O3 exhibited a strong narrow-band red emission, peaking at 612nm. From this result, the phosphor synthesized by firing Y2O3 with 3.7mol% of Eu2O3, 0.25mol% of H3BO3 and 0.5mol% of BaCl2·2H2O fluxes at 1400℃ for 2 hours had a larger particle size of 4mm on average compared to the phosphor of the H3BO3 flux alone. In addition, a phosphor synthesized by the two fluxes together had a rounder corner shape, which led to the maximum emission intensity.

참고자료

· 없음