Quantum-dot light emitting diode, method of fabricating the quantum-dot light emitting diode and quantum-dot light emitting display device

US10873048B2 · kind B2 · utility

Assignee

• LG Display Co., Ltd. · KR

Inventors

• Tae Yang Lee · Gwangju, KR
• Jong-Kwan Bin · Seojong-myeon, KR
• Kyung-Kook Jang · Paju-si, KR
• Seul-Gi CHOI · Paju-si, KR

Key dates

• Filing date: Oct 11, 2019
• Grant date: Dec 22, 2020
• Expiry date: Oct 11, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K50/171

Abstract

A quantum-dot (QD) light emitting diode and a quantum-dot light emitting display device are disclosed. The QD light emitting diode includes first and second electrodes facing each other; a QD emitting material layer between the first and second electrodes and including a QD; a first charge auxiliary layer between the first electrode and the QD emitting material layer; and a second charge auxiliary layer between the QD emitting material layer and the second electrode, wherein the QD includes a core, a shell surrounding the core and a ligand contacting a portion of the shell, and wherein the first charge auxiliary layer contacts the ligand, and the second charge auxiliary layer contacts the shell.