浏览全部资源
扫码关注微信
北京交通大学, 光电子技术研究所, 发光与信息技术教育部重点实验室 北京,100044
Published:20 May 2007,
Received:25 August 2006,
Revised:24 November 2006,
扫 描 看 全 文
娄志东, 衣兰杰, 滕枫, 杨盛谊. 喷雾热解法制备的SrWO<sub>4</sub>膜的阴极射线发光[J]. 发光学报, 2007,28(3): 402-406
LOU Zhi-dong, YI Lan-jie, TENG Feng , YANG Sheng-yi. Cathodoluminescence of SrWO<sub>4</sub> Films Prepared by Spray Pyrolysis[J]. Chinese Journal of Luminescence, 2007,28(3): 402-406
利用超声喷雾热解法制备了钨酸锶SrWO
4
多晶发光膜
并研究了制备条件及掺杂对其阴极射线发光特性的影响.生成的发光膜在300℃以上退火后具有白钨矿结构
其阴极射线发光为一宽带的蓝光
包括一个位于448nm的蓝色发光带和一个位于488.6nm的蓝绿色发光带
是由阴离子络合物WO
4
2-
的电荷转移跃迁引起的.发光强度随着退火温度的升高而增强
而退火气氛对其影响不大.在SrWO
4
膜中掺入银离子Ag
+
和镧离子La
3+
后
不影响其发光特性
但铕离子Eu
3+
的掺入对发光特性有影响.
The second group metal tungstates have attracted particular attention because they have practical importance as laser host materials in quantum electronics and scintillators in medical applications. The luminescence of SrWO
4
which can be excited by short-wavelength ultraviolet radiation
X-rays
cathode rays etc.
mainly shows a blue emission spectrum. It is generally agreed that a thin film phosphor has superior resolution compared to powders because of its smaller grain size and less lateral scattering. Less extensive investigation has been made on the preparation of the SrWO
4
films. A variety of physical and chemical deposition methods including sputtering deposition
electron beam evaporation and electrochemical method have been reported for the preparation of SrWO
4
films. In addition to these techniques
spray pyrolysis method is very interesting because of its advantages of no vacuum
simple instrumentation and low cost. In this paper
SrWO
4
films were prepared on glass substrates by spray pyrolysis. The effects of preparation conditions and monovalent
bivalent and trivalent cation doping on cathodoluminescence (CL) properties of the films were studied. Polycrystalline SrWO
4
films formed a scheelite structure after being annealed above 300℃. They exhibited cathodoluminescence consisting of a blue emission band at 448nm and a blue-green emission band at 488.6nm. The blue and blue-green emission intensities increased with annealing temperature. Annealing atmosphere and doping with Ag
+
and La
3+
did not influence the characteristics of the blue and blue-green emissions
whereas Eu
3+
did. The results indicated both the blue and blue-green emissions originated from the charge transfer transition of WO
4
2-
groups.
喷雾热解法钨酸锶发光膜阴极射线发光
Kaminskii A A,Eichler H J,Ueda K,et al.Properties of Nd3+-doped and undoped tetragonal PbWO4,NaY(WO4)2,CaWO4,and undoped monoclinic CaWO4 and CdWO4 as laser-active and stimulated Raman scattering-active crystal[J].Appl.Opt.,1999,38(21):4533-4547.
Treadaway M J,Powell R C.Energy transfer in samarium-doped calcium tungstate crystals[J].Phys.Rev.B,1975,11(2):862-874.
Blasse G.Structure and Bonding[M].Springer-Verlag,1980,42.
Cho W,Yashima M,Kakihana M,et al.Room-temperature preparation of highly crystallized luminescence SrWO4 film by an electrochemical method[J].J.Am.Ceram.Soc.,1995,78(11):3110-3112.
Zhang Y,Holzwarth N A W,Williams R T.Electronic band structures of the scheelite materials CaMoO4,CaWO4,PbMoO4,PbWO4[J].Phys.Rev.B,1998,57(20):12738-12750.
Carcia P F,Reilly M,Torardi C C,et al.Vapor-deposited CaWO4 phosphor[J].J.Mater.Res.,1997,12(5):1385-1390.
Cho W,Yashima M,Kakihana M.Room-temperature preparation of the highly crystallized luminescent CaWO4 film by an electrochemical method[J].Appl.Phys.Lett.,1995,66(9):1027-1029.
Min K W,Mho S I,Yeo I H.Electrochemical fabrication of luminescent CaWO4 and CaWO4:Pb films on W substrates with anodic potential pulses[J].J.Electrochem.Soc.,1999,146(8):3128-3133.
Grasser R,Scharmann A,Strack K R.On the intrinsic nature of the blue luminescence in CaWO4[J].J.Lumin.,1982,27(3):263-272.
Treadaway M J,Powell R C.Luminescence of calcium tungstate crystals[J].J.Chem.Phys.,1974,61(10):4003-4011.
0
Views
28
下载量
0
CSCD
Publicity Resources
Related Articles
Related Author
Related Institution