Invention Grant
- Patent Title: Organic light-emitting device including multi-layered hole transport layer, and organic light-emitting display apparatus including the same
- Patent Title (中): 包括多层空穴传输层的有机发光装置和包括其的有机发光显示装置
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Application No.: US13682076Application Date: 2012-11-20
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Publication No.: US09172055B2Publication Date: 2015-10-27
- Inventor: Hyoung-Kun Kim , Sam-Il Kho , Mie-Hwa Park , Yoon-Hyun Kwak , Ja-Hyun Im , Chang-Woong Chu , Kwan-Hee Lee
- Applicant: Hyoung-Kun Kim , Sam-Il Kho , Mie-Hwa Park , Yoon-Hyun Kwak , Ja-Hyun Im , Chang-Woong Chu , Kwan-Hee Lee
- Applicant Address: KR Yongin, Gyunggi-Do
- Assignee: SAMSUNG DISPLAY CO., LTD.
- Current Assignee: SAMSUNG DISPLAY CO., LTD.
- Current Assignee Address: KR Yongin, Gyunggi-Do
- Agency: Lee & Morse, P.C.
- Priority: KR10-2012-0069476 20120627
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L27/32 ; H01L51/00
Abstract:
An organic light-emitting device includes an emission layer between first and second electrodes, a first hole transport layer that is between the emission layer and the first electrode and that includes a first hole transport compound and a first electron acceptor, a second hole transport layer that is between the emission layer and first hole transport layer and that includes a second hole transport compound, a third hole transport layer that is between the emission layer and the second hole transport layer and that includes a third hole transport compound and a second electron acceptor, a fourth hole transport layer that is between the emission layer and the third hole transport layer and that includes a fourth hole transport compound, a buffer layer between the emission layer and the fourth hole transport layer, and an electron transport layer that includes a pyrimidine-based compound.
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