Up-converted ultraviolet luminescence of Er3＋：BaGd2Zn05phosphors for healthy illumination

• Published in: 材料科学前沿：英文版 no. 3; pp. 328 - 333
• Main Author: Ya ZHANG Qingzhi CUI Zhanyong WANG Gan LIU Tian TIAN Jiayue XU
• Format: Journal Article
• Language: English
• Published: 2016
• Subjects: Er3; 上转换发光; 健康照明; 白光LED; 白光发光二极管; 紫外发光; 紫外线强度; 紫外荧光粉
• ISSN: 2095-025X; 2095-0268

Moderate level of exposure to the solar irradiation containing UV component is essential for health care. To incorporate the UV-emitting phosphors into the commercial YAG-based white light-emitting diode introduces the possibilities of healthy illumination to individuals＇ daily lives. 1 mol.% E3＊-doped BaGd2ZnO5（BGZ） particles were synthesized via sol-gel method and efficient up-converted luminescence peaked at 380 nm was detected under 480 nm excitation. The mixed phosphors with varied mass ratio of Er3＋：BGZ and Ce3＋：YAG particles were encapsulated to form LEDs. The study of the LEDs indicated that the introduction of BGZ component favored the enhancement of color-rendering index and the neutralization of the white light emitting. The WLED with the BGZ/YAG ratio of 8：2 was recommendable for its excellent overall white light luminous performances and UV intensity of 84.55 mW/cm2. The UV illumination dose of the WLEDs with mixed YAG and BGZ was controllable by adjusting the ratio, the illumination distance and the illumination time. Er3＋：BGZ phosphors are promising UV- emitting phosphors for healthy indoor illumination.