High-Color-Purity Microfluidic Quantum Dots Light-Emitting Diodes Using the Electroluminescence of the Liquid Organic Semiconductor Backlight

• Published in: 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) pp. 724 - 727
• Main Authors: Kawamura, Masahiro, Kuwae, Hiroyuki, Kamibayashi, Takumi, Oshima, Juro, Kasahara, Takashi, Shoji, Shuichi, Mizuno, Jun
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-06-2019
• Subjects: Electrodes; functional organic liquid; high-color-purity; Indium tin oxide; Liquid organic light-emitting diodes (OLEDs); liquid organic semiconductor (LOS); Liquids; Microfluidics; Organic light emitting diodes; Organic semiconductors; Quantum dots; quantum dots light-emitting diodes (QLEDs)
• ISSN: 2167-0021
• DOI: 10.1109/TRANSDUCERS.2019.8808557

We proposed microfluidic quantum dots light-emitting diodes using a liquid organic semiconductor (LOS) and quantum dots (QDs) solutions. LOS and QDs solutions were used as a backlight and a luminophore, respectively. Channels for the QDs solutions were stacked on the LOS backlight. With applying voltage, red photoluminescence (PL) emissions of the QDs solution excited by the LOS backlight, was observed. The full width at half maximum of the red-PL emission was 29.8 nm, which is narrower than that of the LOS backlight by 40%. The proposed device is expected to provide highly-bright flexible displays with high-color-purity.