红橙蓝发光Ce/Mn:Cd_(0.5)Zn_(0.5)B_4O_7材料和体系多重能量传递  

Red/Orange/Blue Luminescence Material Ce/Mn:Cd_(0.5)Zn_(0.5)B_4O_7 and Multiple Energy Transfer System

作　　者：王清珊[1] 刘华芳[1] 张彩慧[2] 常树岚[1] 

机构地区：[1]延边大学,吉林延吉133002 [2]南开大学,天津300071

出　　处：《稀有金属材料与工程》2011年第3期479-482,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(20261006);吉林省科技发展计划项目(20040507-3)

摘　　要：用高温固相法首次制备出红橙蓝3种光发射为一体的(Cd0.38Ce0.06/Mn0.03)Zn0.5B4O7光致发光系列材料,由XRD测得(Cd0.38Ce0.06Mn0.03)Zn0.5B4O7的晶胞参数a、b、c分别为1.3959、0.8134、0.8658nm,属于正交晶系,Pbca空间群。Ce/Mn:Cd0.5Zn0.5B4O7的光谱显示:由285、370、296nm紫外光激发,分别呈现Mn2+的4T1(4G)→6A1(6S)和Ce3+的5d→2F5/2,2F7/2能级跃迁发射以及发射强度比相近的470和630nm的复合光发射。当Ce3+和Mn2+共掺杂时它们互为激活剂和敏化剂。在荧光体Ce/Mn:Cd0.5Zn0.5B4O7中存在极少见的基质、Ce3+和Mn2+的多重能传递,其中以Ce3+Mn2+的双向能量传递为主。助熔剂CaF2和KCl都能降低合成温度和增加发光强度,但对Ce3+和Mn2+发射光谱有不同影响。A series of photoluminescence materials of red-orange-blue three lights emission, Ce/Mn：Cd0.5Zn0.5B4O7 were prepared via a high-temperature solid-state method for the first time. The crystal system, point group and cell parameters of （Cd0.38Ce0.06/ Mn0.03）Zn0.5B4O7 were confirmed by X-ray diffraction. The phosphor belongs to orthorhombic crystal system with Pbca space group. Spectral characteristics of Ce/Mn：Cd0.5Zn0.5B4O7 indicate that excited by 285 nm UV, the emission mainly presents ^4T1（4G）→^6A1（6S） of Mn^2＋; excited by 370 nm UV, the emission is mainly 5d→^2F5/2, ^2F7/2 of Ce^3＋; excited by 296 nm UV, it shows compound light-emitting of 470 nm and 630 nm with similar emission intensity ratio. Ce^3＋ and Mn^2＋ co-exist, and they are the activator and the sensitizer of each other. In the phosphors Ce/Mn：Cd0.5Zn0.5B4O7 there are multiple energy transfers among the host, Ce^3＋ and Mn^2＋, which are rarely found. The major energy transfer is Ce^3←→Mn^2＋. Flux CaF2 and KC1 can reduce the synthesis temperature and increase the luminous intensity, but they have different effects for Ce^3＋ and Mn^2＋ emission spectra.

关 键 词：稀土 红-橙-蓝发光 助熔剂 Ce/Mn:Cd0.5Zn0.5B4O7 多重能量传递 

分 类 号：O482.31[理学—固体物理]