摘要
迄今为止, 稀土长余辉磷光体已见文献或专利公开报道的激活离子主要有适于紫外光激发的三价铈离子(Ce3+)[1,2]和三价镨离子(Pr3+)[3~6]、适于可见光激发的铕离子(Eu3+和Eu2+)[7~9]及钐离子(Sm3+, Sm2+)[9], 尚未涉及到铥离子Tm3+或Tm2+.
One bright unusual afterglow has been observed for the first time in the Tm3+ doped yttrium oxysulfide phosphors synthesized by flux fusion method. When the phosphors are illuminated with UV light (263 nm) or visible light, one bright orange-yellow light can be seen in the darkroom lasting for about one hour. The bright orange-yellow afterglow light is a mixture of six main emissions including 470, 495) 516, 545, 588 and 626 nm, which can be attributed to the 4f-4f transition emissions of Tm3+ in Y2O2S. One conclusion can be drawn from the phosphorescence spectra and the afterglow decay curve that the Tm3+ doped yttrium oxysulfide is a new phosphor with good afterglow properties. The Tm3+ doped yttrium oxysulfide not only shows afterglow when excited by UV light or visible light, but also create obviously upcon version afterglow emission peak located at 545 nm when it was excited by near infrared light (798 nm). This unusual afterglow phenomenon maybe finds some new application of the long-lasting phosphor and opens a new field of phosphor research.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第5期782-784,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:50072031
59982003)
广东省自然科学基金(批准号:990484)
