Organic light-emitting display panel and display device

US10615355B2 · kind B2 · utility

Assignee

• Shanghai Tianma AM-OLED Co., Ltd. · CN

Inventors

• Shuang Cheng · Shanghai, CN
• Xiangcheng Wang · Shanghai, CN
• Jinghua Niu · Shanghai, CN
• Qing-Man Zhu · Kunshan, CN
• Zhi ZHANG · Beijing, CN
• Jianyun WANG · Evergem, BE
• Jun Lin · New Taipei, TW

Key dates

• Filing date: Sep 20, 2018
• Grant date: Apr 7, 2020
• Expiry date: Sep 20, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/351

Abstract

Organic light-emitting display panel and device are provided for improving performance of the organic light-emitting device. The organic functional layer comprises an organic light-emitting layer and a first electron transmission layer between the cathode and the organic light-emitting layer. The first electron transmission layer comprises a first doping agent, and the first doping agent contains alkaline earth metal elements or rare earth metal elements. A second electron transmission layer is located between the first electron transmission layer and the organic light-emitting layer, and the second electron transmission layer is undoped with the first doping agent. A lowest unoccupied molecular orbital LUMO1 in the first electron transmission layer and a lowest unoccupied molecular orbital LUMO2 in the second electron transmission layer satisfy: |LUMO1−LUMO2|<0.18 eV. A highest occupied molecular orbital HOMO2 in the second electron transmission layer and a highest occupied molecular orbital HOMO3 of the organic light-emitting layer satisfy: |HOMO2−HOMO3|<1 eV.