申请人:Kawamura Yuichiro
公开号:US08803420B2
公开(公告)日:2014-08-12
An organic electroluminescence device includes an anode, an emitting layer, an electron-transporting region, and a cathode, the anode, the emitting layer, the electron-transporting region, and the cathode being stacked in this order, the emitting layer including a host material, and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region including a barrier layer that is adjacent to the emitting layer, and the barrier layer including a barrier material that includes an electron-transporting structural part, and a triplet barrier structural part that includes a fused polycyclic aromatic hydrocarbon compound, and satisfies the relationship “ETb>ETh” (where, ETh is the triplet energy of the host material, and ETb is the triplet energy of the barrier material).
一种有机电致发光器件包括阳极、发光层、电子传输区和阴极,阳极、发光层、电子传输区和阴极依次堆叠,发光层包括主体材料和发射荧光的掺杂材料,其主峰波长为550纳米或更短,电子传输区包括邻近发光层的阻挡层,阻挡层包括包含电子传输结构部分和三重态阻挡结构部分的阻挡材料,满足“ETb>ETh”的关系(其中,ETh是主体材料的三重态能量,ETb是阻挡材料的三重态能量)。