Photo-Patternable Quantum Dots/Siloxane Composite with Long-Term Stability for Quantum Dot Color Filters

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Incorporation of quantum dots (QDs) into color filters (CFs) are desired for less energy loss and wider viewing angle compared to a conventional display. However, aggregation and vulnerability to heat, moisture, and chemicals in the photo-patternable matrix are critical issues of the QD-CFs with high QDs concentration. Herein, we fabricated red (10 wt %) and green (20 wt %) QD-CFs using photo- lithography of QD/siloxane ink containing secondary thiol monomer. Ligand-exchanged QDs were chemically incorporated in methacrylate oligosiloxane resin. QD/siloxane composite showed superior stability under harsh heat and moisture (85 degrees C/5% RH and 85 degrees C/85% RH) conditions and chemicals (EtOH, HCl, and NaOH) compared to QD/PR (commercial negative photoresist). QD-CFs (10 mu m thick) effectively converted blue light emitted from LED chip into red and green light, and the obtained white PL through QD-CF showed wide color gamut, which was 108% relative to NTSC. From these advantages, QD/siloxane composite will be beneficial as color-conversion photoresists are to be used as color filters in liquid crystal displays, micro light-emitting diodes, and organic light-emitting diodes.
Publisher
AMER CHEMICAL SOC
Issue Date
2020-01
Language
English
Article Type
Article
Citation

ACS APPLIED MATERIALS & INTERFACES, v.12, no.3, pp.3961 - 3968

ISSN
1944-8244
DOI
10.1021/acsami.9b19586
URI
http://hdl.handle.net/10203/272244
Appears in Collection
CBE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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