Advances in Quantum-Dot-Based Displays.

Yu-Ming Huang,An-Chen Liu,Zhaojun Liu,Chien-Chung Lin,Hao-Chung Kuo,Kai Wang,Konthoujam James Singh,Tingzhu Wu,Yue Lin,Zhong Chen

doi:10.3390/nano10071327

Abstract

In terms of their use in displays, quantum dots (QDs) exhibit several advantages, including high illumination efficiency and color rendering, low-cost, and capacity for mass production. Furthermore, they are environmentally friendly. Excellent luminescence and charge transport properties of QDs led to their application in QD-based light-emitting diodes (LEDs), which have attracted considerable attention in display and solid-state lighting applications. In this review, we discuss the applications of QDs which are used on color conversion filter that exhibit high efficiency in white LEDs, full-color micro-LED devices, and liquid-type structure devices, among others. Furthermore, we discuss different QD printing processes and coating methods to achieve the full-color micro-LED. With the rise in popularity of wearable and see-through red, green, and blue (RGB) full-color displays, the flexible substrate is considered as a good potential candidate. The anisotropic conductive film method provides a small controllable linewidth of electrically conductive particles. Finally, we discuss the advanced application for flexible full-color and highly efficient QD micro-LEDs. The general conclusion of this study also involves the demand for a more straightforward QD deposition technique, whose breakthrough is expected.

Highlights

Quantum dots (QDs) are miniscule semiconductor particles, whose sizes are on the order of a few nanometers
This study reviews the trends in QDs-based display technology, mainly focusing on μLEDs, including array structures and other perovskite QDs-based light-emitting diodes (LEDs) that exhibit high efficiencies and high polarization features
Owing to their exciting potential benefits in terms of performance, power consumption, contrast ratio, lifetime, and response time, QD-incorporated LEDs (QD-LEDs)-based display technology is considered the ultimate option for future generation displays

Summary

Introduction

Quantum dots (QDs) are miniscule semiconductor particles, whose sizes are on the order of a few nanometers. QDs are used as color down-converters for light-emitting diodes (LEDs) to accomplish efficient illumination sources and high-quality displays Both electrically and optically pumped quantum dots are used with LEDs [19]. Among various types of QDs, such as CdSe and InP, perovskite quantum dots (PQDs) exhibit several remarkable optical characteristics, including high photoluminescence quantum yield, tunable emission wavelength, high color purity, making them a possible candidate for next-generation cost-effective display technology [22,23,24,25]. Wei et al suggested several ways of improving the stability of PQDs that are very similar to those described above, such as compositional engineering, surface engineering, matrix encapsulation, and device encapsulation [32] Another explanation for this instability is the movement of protons between oleic acid (OA) and oleylamine (OLA), which induces significant ligand loss. PQDs have the potential to demonstrate lighting application and flexible display technology if the PQDs are well stored and if they can be stable enough to bear high energy radiation

Background of Micro-LED Display

History of QD Patterning Technique

Methods

Flexible WLED

Findings

Conclusions