Structural Features and Color Tunable Photoluminescence of The Binary and Ternary Layered Rare-Earth Hydroxides of (Y, Ln)2 (OH)sNO3·nH2O(Ln=Tb, Eu)
A series of layered rare-earth hydroxides (LRHs) of(Y,Ln)2(OH)5NO3·nH2O (Ln=Tb,Eu),have been synthesized via a hydrothermal route.Crystal structures and optical properties of the materials have been investigated in detail by the combined techniques of XRD,FT-IR,FE-SEM,HR-TEM,and PLE/PL spectroscopies.It is shown that Tb3+ and Eu3+ are successfully incorporated into the Y-LRH host lattice to form solid solutions.Under UV excitation,the binary (Y0.97Tb0.03)-and (Y0.97Eu0.03)-LRHs exhibit their respective characteristic photoluminescence of the EU3+ and Tb3+activators.The ternary (Y0.965Eu0.005Tb0.03)-LRH simultaneously shows red and green emissions and both the intensity and emission color can be adjusted by changing the excitation wavelength.Compared with (Y0.995Eu0.005)-LRH,the ternary (Y0.965Eu0.005Tb0.03)-LRH exhibits appreciably enhanced 615nm red-emission,which indicates the existence of non-radiative energy transfer from Tb3+ to Eu3+.The ternary (Y0.965Eu0.005Tb0.03)-LRH also readily undergoes anion exchange with a series of inorganic and organic anions at room temperature.
layered rare-earth hydroxides solid solutions luminescence color-tune energy transfer
Xiaoli Wu Ji-Guang Li Jinkai Li Shaohong Liu Xiaodong Li Xudong Sun Yoshio Sakka
Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)and School of Materials Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)and School of Materials Advanced Materials Processing Unit,National Institute for Materials Science,Sengen 1-2-1,Tsukuba,Iba
国际会议
景德镇
英文
252-258
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）