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Investigation on direct-current-driven inorganic electroluminescence in rare-earth and Li co-doped ZnO pellets

机译:稀土和锂共掺杂ZnO颗粒的直流驱动无机电致发光研究

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摘要

The phenomena involved in direct-current-driven electroluminescence (DC EL) was investigated, which occurred in the sintered pellets of ZnO doped with rare-earth (RE) and lithium. The microstructural observation revealed that the morphology of loosely-packed small-grains was advantageous for the DC EL, where the doped RE3+ was homogeneously dispersed over the ZnO matrix as small RE2O3 grains. The EL color was dependent on the type of the doped RE3+ and green, blue, or red EL was observed with Er3+, Tm3+, or Eu3+. The EL emission was recognized on the anode side. That brought a new multilayered structure concentrating RE3+ on the anode side to enhance the EL intensity. The occurrence of the EL on the anode side in the presence of an acceptor-type dopant lithium suggested the involvement of holes in the DC EL emission.
机译:研究了直流驱动电致发光(DC EL)现象,该现象发生在掺有稀土(RE)和锂的ZnO烧结颗粒中。微观结构观察表明,松散堆积的小晶粒形态对DC EL有利,其中掺杂的RE3 +作为小RE2O3晶粒均匀地分散在ZnO基质上。 EL的颜色取决于掺杂的RE3 +的类型,并且在Er3 +,Tm3 +或Eu3 +上观察到绿色,蓝色或红色的EL。在阳极侧确认到EL发射。这带来了一种新的多层结构,在阳极侧集中了RE3 +,以增强EL强度。在存在受体型掺杂剂锂的情况下,阳极一侧的EL的出现表明DC EL发射中涉及空穴。

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