Organic light-emitting diode and white organic light-emitting diode

US10622576B2 · kind B2 · utility

Assignee

• Industrial Technology Research Institute · TW

Inventors

• Yu-Jung Peng · New Taipei, TW
• Jiun-Haw Lee · Baoshan, TW
• Po-Chen Tseng · Hengshan, TW
• Bo Lin · Singapore, SG
• Chi-Feng Lin · Taipei, TW
• Tien-Lung Chiu · Pingzhen District, TW
• Ming-Zer Lee · Hengshan, TW

Key dates

• Filing date: Mar 7, 2017
• Grant date: Apr 14, 2020
• Expiry date: Jun 3, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/40

Abstract

An organic light-emitting diode (OLED) and a white OLED are provided. The OLED sequentially includes an anode, an emission layer, an electron transport layer, and a cathode. The emission layer includes a triplet-triplet annihilation (TTA) material and a donor material. The doubled triplet energy of the TTA material is greater than the singlet energy of the TTA material. The donor material is disposed between the anode and the TTA material and has a second singlet energy and a second triplet energy. A sensitizer is doped in the emission layer or formed between the TTA material and the donor material when a voltage is applied. The sensitizer has a third singlet energy and a third triplet energy. The third singlet energy and the third triplet energy are both smaller than the second singlet energy.