Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode; a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer; an electron transport layer; and a cathode disposed, in that order, over a substrate.
本文介绍了包括芳基或杂环基团在两个邻位取代的
配体的
磷光
金属络合物的有机
发光材料和器件。一种有机发光器件,包括:阳极;空穴传输层;有机发光层,包括发光层主体和发光掺杂剂;电子阻隔层;电子传输层;以及依次沉积在基板上的阴极。