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

Cur_xy_（1-X）O_2和Cur_xla_（1-X）O_2（R：EU，EU，TB，TM）样品的Delafossite型氧化物是通过传统的固态反应以二进制氧化物作为源作为源来制备的。为了考虑稀土离子半径，晶状体组分依赖于稀土阳离子的浓度，暗示掺杂在y^（3+）或la^（3+）位点上的r^（3+）阳离子。在cuyo_2和culao_2中观察到了由于Cu^+相互配置从3D^94s到3d^（10）引起的宽发射带，而在相对cur_xy_（1-x）O_2和cur_xla（1-x）O_2和cur_xla（1-x）中，观察到r^（3+）引起的F-F F-F过渡引起的明显急剧发射线（1-x）O_xla（1-x）OO_XLA（1-x）OO_XLA（1-x）OO_XLA（1-x）OO_XLA（1-x）OO_XLA（1-X）OO_X。 cuyo_2和culao_2通过与cuca_yy_（1-y）O_2的R. p型电导率掺杂随CA浓度的增加增加，但Cuca_yla_（1-Y）O_2和Cusr_yla_（1-Y）O_2的浓度却没有。 CUCA_YY_（1-Y）O_2中P型电导率的增加被认为是由Ca^（2+）的替换引起的……更多的受体阳离子Y^（3+）位点。 cur_xca_yy_（1-x-y）O_2与R和CA共掺杂的样品以及Cur_xy_（1-X）O_2和CUCA_YY_（1-Y）O_2样品，由于R^（3+）和良好的P-P-type电导率而导致的f-f friptiation from take（1-y）o_2 o_2示例（1-y）o_2示例（1-y）。这一事实证明了通过与r和ca共同掺杂的发光和cuyo_2的导电性能的可控性。 delafossite-type cuyo_2和cur_xy_（1-x）O_2（R：EU，TB）膜是通过使用金属硝酸盐作为源来制备的。晶格参数对R浓度的依赖性意味着将R^（3+）取代y^（3+）位点。在Cuyo_2膜中观察到了由于Cu^+互构型过渡而引起的绿色排放带，而在相对cutb_xy_（1-x）O_2和CUEU_XY_（1-xy_（1-xy_（1-1-x）中），观察到由于TB^（3+）和EU^（3+）引起的明显尖锐的发射线。这些膜的结果与传统的固态反应制备的cur_xy_（1-x）O_2 O_2 o_2散装样品的数据很好，表明通过解决方案方法成功制备了Cuyo_2和Cur_xy_（1-X）O_2膜。较少的