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Thin Film Electroluminescent Devices using New CaO-GaィイD22ィエD2OィイD23ィエD2 Phosphors

使用新型 CaO-Ga D22 D2O D23 D2 荧光粉的薄膜电致发光器件

基本信息

批准号：
10650046
负责人：
SHINZO Takata
金额：
$ 2.24万
依托单位：
Kanazawa Institute of Technology
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-10650046/
关键词：
Electroluminescence Thin film Oxide phosphor Ceramics Magnetorn sputtering Dip-coating Display

项目摘要

Recently, oxide phosphors have attracted much attention as emitting layers for thin-film electroluminescent (TFEL) devices. For example, TFEL devices using either manganese-activated zinc-silicate (ZnィイD22ィエD2SiOィイD24ィエD2 : Mn) or manganese-activated zinc-gallate (ZnGaィイD22ィエD2OィイD24ィエD2 : Mn) phosphor as the emitting layer produced a high luminance EL emissions. In addition, multicomponent oxide phosphors such as ZnGaィイD22ィエD2OィイD24ィエD2 : Mn - ZnAlィイD22ィエD2OィイD24ィエD2 : Mn and ZnGaィイD22ィエD2OィイD24ィエD2 : Mn - ZnィイD22ィエD2SiOィイD24ィエD2 : Mn systems are promising as emitting layers for TFEL devices, because color coordinate control of the green emission can be realized by varying the composition in the multicomponent oxide host materials. However, only high luminances in green emission could be obtained using these oxide phosphors. In order to obtain high-luminance multicolor emissions from TFEL devices using oxide phosphors, it is necessary to develop new thin-film phosphor materials.In this research, we propose using a new multicomponent oxide phosphor composed of transition metal or rare earth element-doped CaO-GaィイD22ィエD2OィイD23ィエD2 system phosphor, as the emitting layser for TFEL devices. To achieve this, we fabricated TFEL devices using CaO-GaィイD22ィエD2OィイD23ィエD2 phosphor thin-film emitting layers combined with a BaTiOィイD23ィエD2 ceramic sheet insulating layer. For example, the emission color from TFEL devices using CaO-GaィイD22ィエD2OィイD23ィエD2 : Mn phosphors was changed from orange to green by varying the composition of the phosphors.No degradation of EL characteristics was observed in these TFEL devices, even when driven at 10 kHz.

近年来，氧化物荧光粉作为薄膜电致发光器件的发光层引起了人们的广泛关注。例如，使用锰激活的硅酸锌(ZnィイD22ィエD2SiOィイD24ィエD2：Mn)或锰激活的没食子酸锌(ZNGAィイD22ィエD2OィイD24ィエD2：Mn)作为发光层的TFEL器件产生了高亮度的EL发射。此外，多组分氧化物荧光粉如ZNGAィイD22ィエD2OィイD24ィエD2：Mn-ZAlィイD22ィエD2OィイD24ィエD2：Mn和ZNGAィイD22ィエD2OィイD24ィエD2：Mn-ZnィイD22ィエD2SiOィイD24ィエD2：Mn体系是很有前途的TFEL发光层，因为可以通过改变多组分氧化物基质材料的组成来实现绿色发光的颜色坐标控制。然而，使用这些氧化物荧光粉只能获得高亮度的绿色发射。为了利用氧化物荧光粉实现TFEL器件的高亮度多色发射，有必要开发新的薄膜荧光粉材料。在本研究中，我们提出使用一种由过渡金属或稀土元素掺杂的CaO-GaィイD22ィエD2OィイD23ィエD2系荧光粉组成的新型多元氧化物荧光粉作为TFEL器件的发光层。为了实现这一点，我们使用CaO-GaィイD22ィエD2OィイD23ィエD2荧光粉薄膜发光层和BaTiOィイD23ィエD2陶瓷片绝缘层来制备TFEL器件。例如，通过改变磷的组成，使用CaO-GaィイD22ィエD2OィイD23ィエD2：Mn的TFEL器件的发射颜色从橙色变为绿色。即使在10 kHz的驱动下，也没有观察到这些TFEL器件的电致发光特性退化。