Quantum Dots for LED
Product Description
Alfa Chemistry offers customers a range of electroluminescent quantum dots for light emitting diodes (LEDs). Quantum Dots for LEDs are nanoscale semiconductor particles, which means they are about 10,000 times smaller than the diameter of a human hair. Because of their very small size, when blue LED light is shone onto the nanoparticles, the re-emission of light depends on the size of the particle. Quantum dot (QD) light emitting diodes (LEDs) are ideal for large panel displays due to their excellent efficiency, color purity, reliability and cost effective manufacturing.
Advantages of Quantum Dot LEDs
1. The single layer of quantum dots of quantum dot LEDs can be made from colloidal solution, thus having the advantages of simple preparation process, low cost, and can be made into flexible devices.
2. Quantum dots LED devices have high color saturation (luminous half-peak width), the luminous color can be adjusted by controlling the size of quantum dots.
3. Quantum dots are inorganic and have better resistance to water and oxygen erosion than organic semiconductors.
Applications
Sb2S3 is widely used in optical devices such as mirror coatings, anti-reflection coatings, interference filters, absorption polarizers, optical and thermal detectors. Sb2S3 semiconductors are mainly used as thin films of absorbing materials for the production of cheaper solar cells and Hall effect devices. Sb2S3 quantum dots capped with N-acetyl l-cysteine (NAC) were synthesized by hydrothermal method by Alvi et al. Different molar concentrations of N-acetyl-L-cysteine (NAC) were used as a capping agent and its addition was observed to lead to a reduction in noise along with a decrease in peak width and a shift to higher angles at higher concentrations, thus showing better crystallinity of Sb2S3. Sb2S3 is widely used in optical devices such as mirror coatings, anti-reflection coatings, interference filters, absorption polarizers, optical and thermal The addition of N-acetyl-L-cysteine (NAC) as a capping agent at different molar concentrations was observed to lead to a reduction in noise along with a decrease in peak width and a shift to higher angles at higher concentrations, thus showing better crystallinity of Sb2S3. NAC was found to be effective in tuning the physicochemical properties of Sb2S3 quantum dots, including crystallinity, band gap, visible emission, conductivity and surface defect improvement, making them more suitable for advanced LED applications.
As QDs become a viable option for down-conversion materials in LED-backlit LCD displays, they have the potential to be used in several geometries in these otherwise similar display systems. Of all the geometries, QD LCDs will offer users the widest available color gamut, in addition to potential benefits in power efficiency, brightness, and contrast. coe-Sullivan et al. summarize the characteristics of QDs and the advantages of QDs over other competitive down-conversion materials in this LED-backlit LCD.
Fig.1 Depiction of the three different implementation geometries contemplated by this work. (Coe-Sullivan et al., 2013)
Alfa Chemistry can provide a variety of complex and customized fluorescent quantum dot products. Our products involve perovskites precursors, perovskites quantum dots, quantum dot kit, single layer quantum dots, upconverting nanoparticles and other fluorescent quantum dots. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.
References
- Alvi, F. , et al. Structural and optical properties of N-acetyl-l-cysteine capped Sb2S3 quantum dots for LED applications[J]. Optical Materials, 2020, 111:110559.
- Coe-Sullivan, S. , et al. Quantum Dots for LED Downconversion in Display Applications[J]. ecs journal of solid state science & technology, 2013.
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