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Development of Conductive Delafossite-type Oxide Phosphor Co-doped with Rare-earth and Acceptor Cations

稀土与受主阳离子共掺杂导电铜铁矿型氧化物荧光粉的研制

基本信息

批准号：
18560006
负责人：
TSUBOI Nozomu
金额：
$ 2.43万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560006/
关键词：
delafossite CuYO_2 CuLaO_2 phosphor transparent conductive oxide rare earth co-doping conductive oxide phosphor 希土類添加

项目摘要

Delafossite-type oxides of CuR_xY_(1-x) O_2 and CuR_xLa_(1-x) O_2 (R: Eu, Tb, Tm) samples were prepared by the conventional solid state reactions using binary oxides as sources. Taking account of the rare-earth ionic radii, the lattice-constant dependence on the concentration of the rare-earth cation implied doping with the R^(3+) cation on the Y^(3+) or La^(3+) site. A broad emission band due to the Cu^+ interconfiguration transition from 3d^94s to 3d^(10) was observed in CuYO_2 and CuLaO_2, while noticeable sharp emission lines due to the f-f transitions of R^(3+) were observed in respective CuR_xY_(1-x) O_2 and CuR_xLa_(1-x) O_2, indicating successful control of luminescence property of CuYO_2 and CuLaO_2 by doping with R. P-type conductivity of CuCa_yY_(1-y) O_2 increased with increasing Ca concentration, but those of CuCa_yLa_(1-y) O_2 and CuSr_yLa_(1-y) O_2 did not. The increase of the p-type conductivity in CuCa_yY_(1-y) O_2 is considered to be caused by substitution of Ca^(2+) … More acceptor cation for the Y^(3+) site. CuR_xCa_yY_(1-x-y) O_2 samples co-doped with R and Ca, as well as the CuR_xY_(1-x) O_2 and CuCa_yY_(1-y) O_2 samples, exhibited noticeable sharp emission lines due to the f-f transitions of R^(3+) and good p-type conductivity due to Ca^(2+) acceptor. This fact demonstrates controllability of luminescence and conductive properties of CuYO_2 by co-doping with R and Ca. Delafossite-type CuYO_2 and CuR_xY_(1-x) O_2(R: Eu, Tb)films were prepared by solution method using metal nitrates as sources. The lattice-parameter dependence on R concentration implies substitution of R^(3+) for Y^(3+) site. A green emission band due to the Cu^+ interconfiguration transition was observed in CuYO_2 films, while noticeable sharp emission lines due to the f-f transitions of Tb^(3+) and Eu^(3+) were observed in respective CuTb_xY_(1-x) O_2 and CuEu_xY_(1-x) O_2 films. These results for the films correspond well to the data for the CuR_xY_(1-x) O_2 bulk samples prepared by the conventional solid state reactions, indicating successful preparation of CuYO_2 and CuR_xY_(1-x) O_2 films via the solution method. Less

以二元氧化物为原料，采用固相反应法制备了CuR_xY_（1-x）O_2和CuR_xLa_（1-x）O_2（R：Eu，Tb，Tm）样品。考虑到稀土离子的半径，晶格常数对稀土阳离子浓度的依赖性意味着在Y^（3+）或La^（3+）位置掺杂了R^（3+）阳离子。在CuYO_2和CuLaO_2中观察到了由Cu^+3d^94s到3d^（10）组态跃迁引起的宽发射带，而在CuR_xY_（1-x）O_2和CuR_xLa_（1-x）O_2中观察到了由R^（3+）的f-f跃迁引起的明显的尖锐发射线，表明R掺杂成功地控制了CuYO_2和CuLaO_2的发光性能。CuCa_yY_（1-y）O_2的P型电导率随Ca浓度的增加而增加，而CuCa_yLa_（1-y）O_2和CuSr_yLa_（1-y）O_2的P型电导率随Ca浓度的增加而增加。CuCa_yY_（1-y）O_2的p型电导率的增加被认为是由于Ca^（2+）的取代引起的。 ...更多信息 Y^（3+）位点的受体阳离子。R和Ca共掺杂的CuR_xCa_yY_（1-x-y）O_2样品以及CuR_xY_（1-x）O_2和CuCa_yY_（1-y）O_2样品由于R^（3+）的f-f跃迁而具有明显的尖锐发射线，由于Ca^（2+）的受主而具有良好的p型导电性。这一事实表明，通过与R和Ca共掺杂的CuYO_2的发光和导电性能的可控性。以金属硝酸盐为原料，采用溶液法制备了铜铁矿型CuYO_2和CuR_xY_（1-x）O_2（R：Eu，Tb）薄膜。晶格参数对R浓度的依赖性意味着R^（3+）取代了Y^（3+）位置。在CuYO_2薄膜中观察到由Cu^+组态间跃迁引起的绿色发射带，而在CuTb_xY_（1-x）O_2和CuEu_xY_（1-x）O_2薄膜中观察到由Tb^（3+）和Eu^（3+）的f-f跃迁引起的尖锐发射线。这些结果与用传统固相反应法制备的CuR_xY_（1-x）O_2块体样品的结果一致，表明溶液法成功地制备了CuYO_2和CuR_xY_（1-x）O_2薄膜。少