Intense violet-blue emission and paramagnetism of nanocrystalline Gd^(3+) doped ZnO ceramics  

作　　者：S.SAMBASIVAM D.PAUL JOSEPH S.ASIRI NAIDU K.N.HUI K.S.HUI B.C.CHOI 

机构地区：[1]Department of Physics,Pukyong National University,Busan 608-737,Republic of Korea [2]Department of Physics,Velammal Institute of Technology,Chennai 601204,India [3]Department of Physics,National Institute of Technology,Warangal,Telangana 506004,India [4]Rajiv Gandhi University of Knowledge Technologies,Nuzvid,Andhra Pradesh 521201,India [5]Institute of Applied Physics and Materials Engineering,University of Macao,Avenida da Universidade,Taipa,Macao,China [6]Department of Mechanical Convergence Engineering,Hanyang University,17 Haengdang-dong,Seongdong-gu,Seoul 133-791,Republic of Korea

出　　处：《Journal of Advanced Ceramics》2015年第4期300-306,共7页先进陶瓷（英文）

基　　金：supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education,Science and Technology(Grant Nos.2010-0011939,2011-0005007,and 2012-0002518).

摘　　要：Nanocrystalline Zn1-xGdxO(x=0,0.02,0.04,0.06,and 0.08)ceramics were synthesized by ball milling and subsequent solid-state reaction.The transmission electron microscopy(TEM)micrograph of as synthesized samples revealed the formation of crystallites with an average diameter of 60 nm,and the selected area electron diffraction(SAED)pattern confirmed the formation of wurtzite structure.A red shift in the band gap was observed with increasing Gd^(3+)concentration.The photoluminescence of nanocrystalline Gd^(3+)doped ZnO exhibited a strong violet-blue emission.Concentration dependence of the emission intensity of Gd^(3+)in ZnO was studied,and the critical concentration was found to be 4 mol%of Gd^(3+).The Gd^(3+)doped ZnO exhibited paramagnetic behavior at room temperature,and the magnetic moment increased with Gd^(3+)concentration.

关 键 词：X-ray diffraction(XRD) NANO-CERAMICS rare earth element semiconductors 

分 类 号：TQ1[化学工程]