Photo-luminescence properties of nano-structured SiO_2 glasses doped with transition metal and rare earth ions

过渡金属和稀土离子掺杂纳米结构SiO_2玻璃的光致发光性能

• 批准号: 10640567
• 负责人: MORITA Makoto
• 金额: $ 2.05万
• 依托单位: Seikei University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640567/
• 关键词: sol-gel glass; transition metal ion; rare earth ion; luminescent properties; nanostructure; 力構造; 希土類(III)イオン

1) Thin zirconia film doped with semiconductor nanocrystals [xZr0_2 1OO-x CdS : Mn^<2+> and Eu^<3+> (x=20, 50, 80)] were prepared according to the sol gel method and luminescence was measured in the temperature range between 10 and 300 K.In addition time-resolved spectra (TRS) and lifetimes were measured. The observed broad band emission is composed of band-edge emission (CdS), LMCT centers (Zr0_2), deep centers and lattice-bound d-d (Mn^<2+>) or f-f (Eu^<3+>) transitions. The luminescence is characterized by very fast relaxation processes of 1 ns and high thermal activation energy due to the presence of surface-bound deep centers.2) Sol-gel silica glasses doped with transition metal complexes were prepared by the sol-gel method in order to investigate changes of valences of Cr and V ions in mesoporous matrices. In the glasses, annealed above 500 ℃, a structured broad band is found due to LMCT transitions in [Cr(VI)O_4]^<2-> and [V(V)0_4]^<3-> ions. The spectral shapes, lifetimes and vibronic structures change due to structural changes at higher temperatures.3) Xerogel and annealed sol-gel silica glasses doped with europium complexes of 15-crown-5 were studied similarly. The ^5D_0->^7F_1 transition gives evidence of the stabilization of the complex in xerogel and glasses annealed below 100 ℃ for 24 hrs. From the splitting of the ^5D_0->^7F_1 transition, crystal field parameters B_0^<(2)>, B_2^<(2)> are derived. Axial symmetry is decreasing with increase of annealing temperatures.

1)采用溶胶凝胶法制备了掺杂半导体纳米晶[xZrO_2 1O-x CdS：Mn^&lt；2+&gt；和Eu^-lt；3+&gt；(x=20，50，80)]的氧化锆薄膜，测量了薄膜在10~300K温度范围内的发光性能，并测量了薄膜的时间分辨光谱(TRS)和寿命。观察到的宽带发射由带边发射(CDS)、LMCT中心(Zr0_2)、深中心和晶格束缚d-d(Mn^&lt；2+&gt；)或f-f(Eu^&lt；3+&gt；)跃迁组成。2)为了研究铬、钒离子在介孔基质中的价态变化，采用溶胶凝胶法制备了掺杂过渡金属络合物的溶胶-凝胶二氧化硅玻璃。在500℃以上退火的玻璃中，由于[Cr(VI)O_4]^&lt；2-&gt；和[V(V)O_4]^&lt；3-&gt；离子的LMCT跃迁，发现了一个有结构的宽带。3)研究了15-冠-5稀土配合物掺杂的干凝胶和退火态溶胶-凝胶二氧化硅玻璃的光谱形状、寿命和振动结构。^5D_0-&gT；^7F_1的转变证明了络合物在干凝胶和玻璃中的稳定性。干凝胶和玻璃在100℃以下退火24小时。从^5D_0-&gt；^7F_1跃迁的分裂得到晶场参数B_0^&lt；(2)&gt；，B_2^&lt；(2)&gt；轴对称性随退火温度的升高而降低。

项目成果

M.Morita, M.Baba et.al: "Photoluminescence properties and ultra-fact decay profiles of nanoparticles in sot-gel zirconia this film X ZrO_2-100-XCds : Mn^<2+> and Eu^<3+>"J.Lumir. in print. (2001)

M.Morita、M.Baba 等人：“该薄膜 X ZrO_2-100-XCds：Mn^2 和 Eu^3> 溶胶凝胶氧化锆中纳米粒子的光致发光特性和超事实衰减曲线”J。

M.Morita, M.Herren, T.Ansai, D.Rau: "Excited-state chiral discrimination of Tb(III) complexes of (S,S')- and (R, R')-ethylenediaminedisuccinic acid in circularly polarized luminescence and decay profiles"J.Lumin. 87-89. 976-979 (2000)

M.Morita、M.Herren、T.Ansai、D.Rau：“圆偏振发光中 (S,S)- 和 (R, R)-乙二胺二琥珀酸 Tb(III) 配合物的激发态手性辨别

M.Morita, D.Rau, H.Fujii, K.Minam, S.Murakami, M.Baba^*, M.Yoshida^* and H.Akiyama: "Photoluminescence of CdS : Mn^<2+> and Eu^<3+> nanoparticles dispersed in zirconia sol-gel films"J.Lumin. 87-89. 478-481 (2000)

M.Morita、D.Rau、H.Fujii、K.Minam、S.Murakami、M.Baba^*、M.Yoshida^* 和 H.Akiyama：“CdS 的光致发光：Mn^<2> 和 Eu^<

M.Morita, D.Rau, and H.Takaba: "Luminescence and circularly polarized luminescence of excited-state chiral structures in one-dimensional PIC-J dye aggregates"Microelec.Eng.. 51-52. 605-611 (2000)

M.Morita、D.Rau 和 H.Takaba：“一维 PIC-J 染料聚集体中激发态手性结构的发光和圆偏振发光”Microelec.Eng. 51-52。

S.Budamidu, M.Morita et.al: "Temperature dependent luminescence and energy transfer in europium and rare earth codoped nanostructured xerogel and sol-gel silica glass"J.Lumin.. 83-84. 199-203 (1999)

S.Budamidu、M.Morita 等人：“铕和稀土共掺杂纳米结构干凝胶和溶胶-凝胶二氧化硅玻璃中的温度依赖性发光和能量转移”J.Lumin.. 83-84。