申请人:Novaled GmbH
公开号:US11201306B2
公开(公告)日:2021-12-14
The present invention relates to a display device comprising—a plurality of OLED pixels comprising at least two OLED pixels, the OLED pixels comprising an anode, a cathode, and a stack of organic layers, wherein the stack of organic layers—is arranged between and in contact with the cathode and the anode, and—comprises a first electron transport layer, a first hole transport layer, and a first light emitting layer provided between the first hole transport layer and the first electron transport layer, and—a driving circuit configured to separately driving the pixels of the plurality of OLED pixels, wherein, for the plurality of OLED pixels, the first hole transport layer is provided in the stack of organic layers as a common hole transport layer shared by the plurality of OLED pixels, and the first hole transport layer comprises (i) at least one first hole transport matrix compound consisting of covalently bound atoms and (ii) at least one electrical p-dopant selected from metal salts and from electrically neutral metal complexes comprising a metal cation and at least one anion and/or at least one anionic ligand consisting of at least 4 covalently bound atoms, wherein the metal cation of the electrical p-dopant is selected from alkali metals; alkaline earth metals, Pb, Mn, Fe, Co, Ni, Zn, Cd; rare earth metals in oxidation state (II) or (III); Al, Ga, In; and from Sn, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W in oxidation state (IV) or less, a method for preparing the display device and a chemical compound for use therein.
本发明涉及一种显示装置,包括-多个 OLED 像素,该多个 OLED 像素包括至少两个 OLED 像素,该 OLED 像素包括阳极、阴极和有机层堆叠,其中有机层堆叠-布置在阴极和阳极之间并与阴极和阳极接触,并且-包括第一电子传输层、第一空穴传输层和设置在第一空穴传输层和第一电子传输层之间的第一发光层,以及-驱动电路,该驱动电路被配置为分别驱动多个 OLED 像素中的像素,其中、对于多个 OLED 像素,第一空穴传输层作为多个 OLED 像素共享的共用空穴传输层被设置在有机层堆叠中、第一空穴传输层包括:(i) 至少一种由共价结合原子组成的第一空穴传输基质化合物;(ii) 至少一种选自金属盐和电中性金属复合物的电 p-掺杂剂,电中性金属复合物包括金属阳离子和至少一种阴离子和/或至少一种由至少 4 个共价结合原子组成的阴离子配体,其中电 p-掺杂剂的金属阳离子选自碱金属碱土金属、Pb、Mn、Fe、Co、Ni、Zn、Cd;氧化态(II)或(III)的稀土金属;Al、Ga、In;以及氧化态(IV)或更低的Sn、Ti、Zr、Hf、V、Nb、Ta、Cr、Mo和W。