摘要
本文利用在ZnS中同时掺入Cu:Mn=0.25的激活剂,从而制得同质发白光的ACEL粉。其CIE坐标为x=0.343,y=0.385。
In order to obtain white-emitting ACEL, some researchers mixed two or three kinds of ACEL material. But the results were not so good. Others reported some progress of white-emitting ACEL powder using homogenenous material. In present paper, we report some new results of preparing homogenenous white-emitting ACEL powder.The conditions for preparing samples are: 1) dopant concentrations, Cu2 + 0.2% and Mn2 + 0.05%-0.2% (weight), 2)temperature of firing 850-900C; 3) time of firing, 30-40min.The spectra of ZnS: Cu, Mn with different ratio of Cu/Mn under the excitation of 400Hz and 200V are shown in Fig.1. There appear three spectrum peaks at 4560A, 5260A and 5850A in the limited concentration range of dopants. The peaks 4650 A and 5260 A aries from the luminescent center Cu and 5850 A arises from the center Mn. We have obtained the white-emitting ACEL phosphor with coordinates x= 0.343, y = 0.386 and the ratio of Mn/Cu = 0.25. under the excitation of f = 400Hz and 200V. The relation between brightness and excitation field is shown in Fig.2. It appears that the excitation process is collision-ionization or collision-excitation. We have also observed the relation between excitation field waveform and brightness waveform. The results are shown in Fig.3. It is clear that ACEL brightness Waveform of ZnS:Cu, Mr, is consisted of the overlap of Cu and Mn luminescence.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1989年第2期147-151,共5页
Chinese Journal of Luminescence
