申请人:SUMITOMO ELECTRIC INDUSTRIES, LTD.
公开号:EP0647694A1
公开(公告)日:1995-04-12
The first organic electroluminescent element is provided with a low-molecular 1,2,4-triazole derivative layer; the second element has a carrier transport control layer for selectively transporting holes or electrons, which layer is interposed between an electron transport layer and a hole transport layer; the third element comprises a laminate of an electron transport with a hole-transport luminescent layer wherein a coloring matter is dispersed in a polymer on the molecular level; the fourth element is provided with a layer containing a high-molecular 1,2,4-triazole derivative as the hole transport material; and the fifth element is provided with a layer wherein a hole transport material is dispersed in a high-molecular 1,2,4-triazole derivative on the molecular level. These elements are excellent in luminous efficacy, luminance and stability, and permit blue luminescence, primary multi-color luminescence, and white luminescence.
第一种有机电致发光元件具有低分子 1,2,4-三唑衍生物层;第二种元件具有载流子传输控制层,用于选择性地传输空穴或电子,该层位于电子传输层和空穴传输层之间;第三元件由电子传输发光层和空穴传输发光层组成,其中着色物质在分子水平上分散在聚合物中;第四元件具有含有高分子 1,2,4-三唑衍生物的层,作为空穴传输材料;第五元件具有层,其中空穴传输材料在分子水平上分散在高分子 1,2,4-三唑衍生物中。这些元件具有出色的光效、亮度和稳定性,可发出蓝色荧光、原色多色荧光和白色荧光。