Organic electroluminescent devices and preparation methods thereof

US11233201B2 · kind B2 · utility

Assignee

• KunShan Go-Visionox Opto-Electronics Co., Ltd · CN

Inventors

• Weiwei Li · Langfang, CN
• Shengfang LIU · Kunshan, CN
• Chao Min · Kunshan, CN
• Lei Xu · Ottawa, CA
• Xiaoyu Gao · Kunshan, CN
• Xiuqi Huang · Kunshan, CN

Key dates

• Filing date: May 23, 2018
• Grant date: Jan 25, 2022
• Expiry date: Sep 5, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure relates to an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device includes a hole injection layer including a first doped layer and/or a second doped layer. The first doped layer includes a P-type dopant, and the second doped layer includes a P-type dopant and a hole transport material. The organic electroluminescent device includes a hole transport layer formed on the hole injection layer, and an electron blocking layer formed on the hole transport layer. A difference in HOMO energy level between the electron blocking layer and the hole transport layer is less than or equal to 0.2 eV. The power consumption of the organic electroluminescent device can be reduced. The lifetime of the mass production device therefore can be increased.