Organic light emitting diode device with organic hole transporting material and phosphorescent material

US6822257B2 · kind B2 · utility

Assignee

• RITDISPLAY CORPORATION · TW

Inventors

• Yung-Chih Lee · Taipei, TW
• Wei-Su Chen · Hsinchu, TW
• Chi-Chih Liao · Taipei, TW
• Jiun-Haw Lee · Baoshan, TW

Key dates

• Filing date: Jan 29, 2003
• Grant date: Nov 23, 2004
• Expiry date: Jan 29, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/10

Abstract

An organic light emitting diode (OLED) device comprises a substrate, an anode layer, a luminescence layer, a hole blocking layer and a cathode layer. The anode layer is disposed on the substrate; the luminescence layer is disposed on the anode layer; the hole blocking layer is disposed on the luminescence layer; the cathode layer is disposed on the hole blocking layer. In addition the luminescence layer comprises a hole transporting material and a phosphorescent material, wherein the weight percentage of the bole transporting material and the phosphorescent material is between 40%˜60%.