Full-color quantum dots active matrix display fabricated by ink-jet printing

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（10）
• 页码范围: 1349-1355
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11426-017-9087-y

摘要

Making full-color active matrix display based on quantum dot light emitting diodes (AM-QLEDs) via ink-jet printing is attractive in display industry due to QLEDs' wide color gamut and their potential manufacturing advantages of large screen size and low cost.The challenges for realizing AM-QLED display are how to achieve high quality films through ink-jet printing,multi-color patterning,electroluminescence (EL) color purity,and high efficiency.Herein,a 2-inch diagonal full-color AM-QLEDs display with pixel density of 120 pixels per inch (PPI) fabricated by ink-jet printing technique is presented.Driven by a metal oxide TFT (MOTFT) back-panel,the display exhibits a maximum brightness of 400 cd m-2,and a color gamut of 109％ (NTSC 1931).The red,green,and blue (RGB) monochrome QLEDs passive matrix panels fabricated by ink-jet printing technique have a current efficiency (CE) of 2.5,13.9,and 0.30 cd A-1,respectively.To the best of our knowledge,the efficiencies are the highest among passive matrix QLEDs panels made by ink-jet printing technique.The ink-jet printed QDs films show good thickness uniformity due to high viscosity and low volatility of the printable inks,and no cross-contamination between adjacent pixels resulting from the hydrophobic pixel defining layer.