FYI - QMC makes Cad Free Blue QD now and has test
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Posted On: 03/05/2018 6:34:43 PM
FYI - QMC makes Cad Free Blue QD now and has tested them in a LED
This is an abstract of a paper on Cadmium-core Blue QD from 2017. Blue QD are typically smaller QD, and harder to make. I do not know of another company advertising / selling Cad-Free Blue QD. Blue QD could replace Phosphors in LEDs.
Blue QD in a film could replace LEDs in general in MicroLED products.
Blue Quantum Dot Light-Emitting Diodes with High Electroluminescent Efficiency.
Abstract
High-efficiency blue CdSe/ZnS quantum dots (QDs) have been synthesized for display application with emission peak over 460 nm with the purpose of reducing the harmful effect of short-wavelength light to human eyes. To reach a better charge balance, different size ZnO nanoparticles (NPs) were synthesized and electrical properties of ZnO NPs were analyzed. Quantum dot light-emitting diodes (QLEDs) based on as-prepared blue QDs and optimized ZnO NPs have been successfully fabricated. Using small-size ZnO NPs, we have obtained a maximum current efficiency (CE) of 14.1 cd A-1 and a maximum external quantum efficiency (EQE) of 19.8% for QLEDs with an electroluminescence (EL) peak at 468 nm. To the best of our knowledge, this EQE is the highest value in comparison to the previous reports. The CIE 1931 color coordinates (0.136, 0.078) of this device are quite close to the standard (0.14, 0.08) of National Television System Committee (NTSC) 1953. The color saturation blue QLEDs show great promise for use in next-generation full-color displays.
Paywall-
ACS Appl Mater Interfaces. 2017 Nov 8;9(44):38755-38760. doi: 10.1021/acsami.7b10785. Epub 2017 Oct 27.
KEYWORDS:
CIE 1931 color coordinates; EQE; high efficiency; light-emitting diodes; quantum dots
PMID: 29039645 DOI: 10.1021/acsami.7b10785
This is an abstract of a paper on Cadmium-core Blue QD from 2017. Blue QD are typically smaller QD, and harder to make. I do not know of another company advertising / selling Cad-Free Blue QD. Blue QD could replace Phosphors in LEDs.
Blue QD in a film could replace LEDs in general in MicroLED products.
Blue Quantum Dot Light-Emitting Diodes with High Electroluminescent Efficiency.
Abstract
High-efficiency blue CdSe/ZnS quantum dots (QDs) have been synthesized for display application with emission peak over 460 nm with the purpose of reducing the harmful effect of short-wavelength light to human eyes. To reach a better charge balance, different size ZnO nanoparticles (NPs) were synthesized and electrical properties of ZnO NPs were analyzed. Quantum dot light-emitting diodes (QLEDs) based on as-prepared blue QDs and optimized ZnO NPs have been successfully fabricated. Using small-size ZnO NPs, we have obtained a maximum current efficiency (CE) of 14.1 cd A-1 and a maximum external quantum efficiency (EQE) of 19.8% for QLEDs with an electroluminescence (EL) peak at 468 nm. To the best of our knowledge, this EQE is the highest value in comparison to the previous reports. The CIE 1931 color coordinates (0.136, 0.078) of this device are quite close to the standard (0.14, 0.08) of National Television System Committee (NTSC) 1953. The color saturation blue QLEDs show great promise for use in next-generation full-color displays.
Paywall-
ACS Appl Mater Interfaces. 2017 Nov 8;9(44):38755-38760. doi: 10.1021/acsami.7b10785. Epub 2017 Oct 27.
KEYWORDS:
CIE 1931 color coordinates; EQE; high efficiency; light-emitting diodes; quantum dots
PMID: 29039645 DOI: 10.1021/acsami.7b10785
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