High‐Resolution Full‐Color Quantum Dots Patterning for Display Applications Based on Femtosecond Laser‐induced Forward Transfer

• Published in: Laser & photonics reviews Vol. 18; no. 4
• Main Authors: Liang, Shu‐Yu, Liu, Yue‐Feng, Ji, Zhi‐Kun, Xia, Hong, Sun, Hong‐Bo
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.04.2024
• Subjects: Arrays; Color; femtosecond laser‐induced forward transfer; full‐color, quantum dots; high precision; high resolution display; Light emitting diodes; Optoelectronic devices; Patterning; Quantum dots; Smoothness
• ISSN: 1863-8880; 1863-8899
• DOI: 10.1002/lpor.202300388

Colloidal quantum dots (QDs) have been widely studied in display panels due to their near‐unity fluorescence quantum yield and the ability to tune colors across a wide gamut. However, the challenge persists in creating full‐color QD arrays with the necessary precision for high‐resolution display applications in the next generation. This paper introduces a femtosecond laser‐induced forward transfer (FsLIFT) technology that integrates deposition pattern and alignment in a single transfer step. This development enables the fabrication of high‐resolution full‐color QD films. The ability of FsLIFT to precisely locate red, green, and blue QDs in a designated position allows to obtain arbitrarily shaped full‐color patterns and pixel arrays with a resolution of 1.78 µm. In addition, the potential for optoelectronic devices is ensured by the preserved photophysical properties, high smoothness, and continuity of the transferred QD films. Consequently, the light‐emitting diodes (LEDs) are successfully fabricated based on the transferred QD films. This study expects that the introduced straightforward patterning technology, offering high freedom, precision, and repeatability, will contribute to advancing the development of full‐color high‐resolution displays based on QDs. As the metaverse concept gains widespread popularity, the technology industry associated with it is increasingly capturing the spotlight. Achieving the optimal metaverse experience necessitates the production of high‐resolution light‐emitting diode (LED) arrays, this study reports a femtosecond laser‐induced forward transfer (FsLIFT) technology that can integrates deposition pattern and alignment in one single transfer step to fabricate high‐resolution full‐color QDs films.