Fabricating Quantum Dot Color Conversion Layers for Micro-LED-Based Augmented Reality Displays
Journal
ACS Applied Optical Materials
Journal Volume
2
Journal Issue
7
Start Page
1303
End Page
1313
ISSN
2771-9855
2771-9855
Date Issued
2023-08-02
Author(s)
Kai-Ling Liang
Han-Yu Chao
Chun-I Wu
Suh fang Lin
Bo-Ming Huang
Chun-Wei Huang
Wei-Hung Kuo
Yen-Hsiang Fang
Abstract
Colloidal quantum dots have attracted much attention for their potential application in the color conversion scheme of next-generation microdisplays. One of the possible methods to pattern these nanoparticles into arrays is to use quantum dot photoresists. We will demonstrate a high-resolution color conversion layer with a 1.5 μm by 4 μm subpixel size and a pixel density exceeding 2000 pixels-per-inch (PPI). The photonic characteristics are analyzed, and the estimated color conversion efficiencies are 9.51% for green and 16.55% for red. A full National Television Standards Committee (NTSC) (gamut coverage: 100%, area ratio: 114%) color gamut is achieved in a 992-PPI microdisplay by adding an optical reflector on the top. Without this reflector, the coverage drops to 82.9%. A comparative study found a steady improvement for the photoresist method over the past decade, and a color conversion layer with an even higher resolution can be expected.
SDGs
Publisher
American Chemical Society (ACS)
Type
journal article