CAJ | 학술논문

采用溶剂热法,以乙二胺为溶剂,碳酸氢铵沉淀法制备的沉淀产物为前驱体,在低温下合成了YAG:Ce荧光粉体.研究了反应时间对合成产物的组成、分散性以及荧光性能的影响,结果表明:在200 ℃低温保温5 h条件下,可得到颗粒尺寸为260～280 nm的球形YAG:Ce颗粒,颗粒尺寸均匀,且分散性好;荧光性能表征显示,其发射光谱为一宽带,峰值在530 nm附近,对应于Ce~(3+)的最低5d能级到4f能级跃迁所发出的光,可与高效蓝光LED匹配制备双基色白光LED,用于新型节能光源.
채용용제열법,이을이알위용제,탄산경안침정법제비적침정산물위전구체,재저온하합성료YAG:Ce형광분체.연구료반응시간대합성산물적조성、분산성이급형광성능적영향,결과표명:재200 ℃저온보온5 h조건하,가득도과립척촌위260～280 nm적구형YAG:Ce과립,과립척촌균균,차분산성호;형광성능표정현시,기발사광보위일관대,봉치재530 nm부근,대응우Ce~(3+)적최저5d능급도4f능급약천소발출적광,가여고효람광LED필배제비쌍기색백광LED,용우신형절능광원.
Single-phase YAG:Ce phosphor powders, with well-dispersed fine spherical grains, were synthesized by solvothermal method at lower temperature. The effects of reaction time on the composition, dispersion and luminescence properties of products were studied. Results show that pure phase YAG:Ce crystalline was formed after solvothermal treatment at 200 ℃ for 5 h. The resultant YAG:Ce powders were spherical and well dispersed. The sizes of the grains were in the range of 260～280 nm. The photoluminescence spectrum of the crystalline YAG:Ce phosphors showed their emission band was wide with the peak at 530 nm and they belonged to the 5d→4f transitions of Ce~(3+), which can be used to make novel energy-saving light source.