Compound, a display panel and an electronic device

US11649254B2 · kind B2 · utility

Assignee

• WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH · CN

Inventors

• Wei Gao · Shanghai, CN
• Wenpeng Dai · Shanghai, CN
• Lei Zhang · Shanghai, CN
• Wenjing Xiao · Murrysville, US
• Jinghua Niu · Shanghai, CN
• Sha Lin · San Jose, US

Key dates

• Filing date: May 14, 2020
• Grant date: May 16, 2023
• Expiry date: May 15, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure provides a compound for a display panel. The compound includes elements selected from O, S or N, electron-donor groups and electron-accepting groups. The OLED device in the display panel includes an anode, a cathode, and at least one organic thin film layer between the anode and the cathode. The organic thin film layer includes a light emitting layer, the light emitting layer includes the compound of the present disclosure, and the compound is used to be any one of a host material, a doping material, and a co-doping material. The compound reduces energy level difference between singlet and triplet states ΔEST through design of the compound molecular structure. The compound realizes an efficient reverse intersystem crossing process, has typical TADF characteristics, and can be used as a light-emitting layer material of an OLED device to improve luminous efficiency and working life.