ORGANIC LIGHT EMITTING DEVICE AND DISPLAY DEVICE HAVING THEREOF

• Main Authors: CHO, GWI JEONG, HEO, JEONG HAENG, KIM, TAE SHICK, KUM, TAE IL, CHOI, HEE DONG, KIM, HYUNG JUNE
• Format: Patent
• Language: English; Korean
• Published: 14.06.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

Provided is an organic light emitting device of which the lifespan is extended and light emitting efficiency is improved. The organic light emitting device according to the present invention has first and second charge generation layers arranged between an anode and a cathode, has a first stack arranged between the anode and the first charge generation layer and having a blue organic light emitting layer, has a second stack arranged between the first charge generation layer and the second charge generation layer and having a yellow-green organic light emitting layer, has a third stack arranged between the second charge generation layer and the cathode and having the blue organic light emitting layer, and has a charge adjustment layer, doped with a blue dopant, formed in at least one hole transporting layer from a hole transporting layer of the first stack and a hole transporting layer of the third stack. 본 발명의 유기전계발광소자는 양극과 음극 사이에 제1,2전하생성층이 배치되고 양극과 제1전하생성층 사이에 청색 유기발광층을 구비한 제1스택이 배치되며, 제1전하생성층과 제2전하생성층 사이에 황색-녹색 유기발광층을 구비한 제2스택이 배치되고 제2전하생성층과 음극 사이에 청색 유기발광층을 구비한 제3스택이 배치되며, 제1스택의 정공수송층과 제3스택의 정공수송층중 적어도 하나의 정공수송층에는 청색도펀트가 도핑된 전하조철층이 형성된다.