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P‐89: Ink Formulation and Film Photo‐Stability of Quantum Dot Color Converters for MicroLED Applications
Author(s) -
Chen Chih-Jung,
Chiang Tsung-Hsing,
Lin Chiao-Yang,
Chiang Ray-Kuang
Publication year - 2020
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.14226
Subject(s) - quantum dot , inkwell , materials science , converters , polymer , optoelectronics , surface tension , solvent , nanocomposite , nanotechnology , power (physics) , composite material , chemistry , physics , organic chemistry , quantum mechanics
Both solvent‐based and solvent‐free quantum dots (QDs) polymer nanocomposites were considered for the color converter applications on microLEDs. In the case of patterning QD converters based on inkjet printing, the viscosity and surface tension of inks are required to be less than 12 cps and less than 33 dyne/cm, respectively. The QD color conversion layers (QDCCLs) with thickness of < 10 μm, optical density (OD) of > 1.5, and the light conversion efficiency (LCE) of >60% from both types of inks are practicable on the basis of polymer formulation. The photostability of the QDCCLs were investigated under blue LED lights of power density of 1, 5, and 15 W/cm 2 . The corresponding ink processability and converter films reliability and optical performance are described and discussed in this paper.