Quantum Dots - Page 2

DSCC, a provider of display market research and consulting services, recently published its projections regarding revenues from QDs. According to DSCC, demand for QD materials in the display industry is growing, and the market will grow to $100 million in 2024. It will continue to grow and reach $122 million in 2027. 

DSCC specifically predicts that perovskite materials will capture some market share. It explained that green perovskite is available but red perovskite is still under development, so it is often paired with a red phosphor. The technology is currently in the early stage of commercialization and the supply chain will take some time to build.

Researchers from Hanyang University, Nankai University and Kookmin University have developed a room-temperature-processed tin oxide (SnO₂) ETL preparation method for flexible perovskite quantum dots (PQD) solar cells. Low-temperature ETL deposition methods are especially desirable for fabricating flexible solar cells on polymer substrates.

The process involves synthesizing highly crystalline SnO₂ nanocrystals stabilized with organic ligands, spin-coating their dispersion, followed by UV irradiation. The energy level of SnO₂ is controlled by doping gallium ions to reduce the energy level mismatch with the PQD. 

Perovskite-Info is proud to announce an update to our Perovskite for the Display Industry Market Report. This market report, brought to you by the world's leading perovskite and OLED industry experts, is a comprehensive guide to next-generation perovskite-based solutions for the display industry that enable efficient, low cost and high-quality display devices. The report is now updated to February 2024, with all the latest commercial and research activity. This was a major version, with over 15 updates, new companies and new technologies covered.

Reading this report, you'll learn all about:

• Perovskite materials and their properties
• Perovskite applications in the display industry
• Perovskite QDs for color conversion
• Prominent perovskite display related research activities

The report also provides a list of perovskite display companies, datasheets and brochures of pQD film solutions, an introduction to perovskite materials and processes, an introduction to emerging display technologies and more.

Ulsan National Institute of Science and Technology (UNIST) researchers have developed solar cells using narrow bandgap organic cation-based perovskite-based quantum dots (PQDs) and demonstrated substantially higher efficiency compared with their inorganic counterparts. 

The team stressed that research to this point has predominantly focused on inorganic cation PQDs despite the fact that organic cation PQDs have more favorable bandgaps. However, the recent study unveiled a novel ligand exchange technique, that enables the synthesis of organic cation-based PQDs, ensuring exceptional stability while suppressing internal defects in the photoactive layer of solar cells.

A team of researchers, led by Maksym Kovalenko at ETH Zurich and Empa, working in collaboration with scientists from the U.S. and Ukraine, recently demonstrated how the promising properties of perovskite quantum dots can be improved further. They used chemical methods for surface treatment and quantum mechanical effects that had never before been observed in perovskite quantum dots. 

Perovskite quantum dots can be mixed with liquids to form a dispersion, which makes them easy to process. Moreover, their special optical properties make them shine more brightly than many other quantum dots. They can also be produced more cheaply, which makes them interesting for applications in displays, for instance. On top of all this, the newly developed phospholipid molecules create a protective layer around the perovskite nanocrystal and make it possible to disperse it in non-aqueous solutions. They also ensure that the quantum dot emits photons more continuously. 

Swiss additive manufacturing startup Scrona and Avantama, developer and manufacturer of high-tech materials for electronics, have jointly announced that they have successfully processed high-performance perovskite quantum dot (QD) ink using Scrona's electrohydrodynamic (EHD) inkjet printing. 

This collaboration combines the benefits of the inkjet process with high-patterning resolution to drive a new generation of efficient and cost effective MicroLED displays, while also increasing color purity and brightness, and improving overall pixel production tact time. 

Researchers at Pusan National University and the University of Oxford have made an advanced in the field of perovskite nanosheets as promising new laser materials. The team overcame the inherent limitations of CsPbBr quantum dots using perovskite nanosheets, which provide enhanced light amplification abilities. 

The researchers introduced an innovative waveguide pattern, which increased the gain and thermal stability of the perovskite nanosheets. This pattern improved the optical confinement and heat dissipation, offering a solution to the limitations previously faced with quantum dots. The research team also pioneered a new ‘gain analysis’ method known as the ‘gain contour’. This novel technique provides a more in-depth understanding of gain saturation across various spectrum energies and optical stripe lengths.

Helio Display Materials has announced it will be moving its perovskite-based display materials (that were jointly invented within Cambridge and Oxford Universities) to pilot-scale production.

The materials generate light of the desired color by converting light rather than filtering it which provides power savings of up to 40% and a step change improvement in color gamut. With perovskites, the wavelength of emitted light can be tuned by chemical composition. This contrasts with quantum dots which rely on quantum confinement in identically sized nanometer scale particles. Color by composition massively simplifies the manufacturing process for perovskites vs. quantum dots and allows the use of standard chemical industry processes and equipment.

Researchers at North Carolina State University, Brown University and University at Buffalo have developed an autonomous system that can identify how to synthesize “best-in-class” materials for specific applications in hours or days. 

The new system, called SmartDope, was developed to address a persistent challenge regarding enhancing properties of perovskite quantum dots via “doping.”

Researchers from China's Hebei University of Technology and Chinese Academy of Sciences have found that increasing the diameter of single-wall carbon nanotubes (SWCNTs) in SWCNT/perovskite QD heterojunctions can improve the optoelectronic performance of the heterojunction between the two materials.

The team systematically tested the performance effects of varying diameters of SWCNTs, a single layer of carbon atoms that form a hexagonal lattice rolled into a seamless cylinder, with different band gaps, or the amount of energy required for an electron to conduct electric current, in heterojunction films with perovskite QDs. Their study indicated that increasing the diameter of SWCNTs improved the responsivity, detectivity and response time of this type of heterojunction film. This effect may be mediated by the enhanced separation and transport of photogenerated excitons, an energy-carrying, neutrally charged electron that combines with a positive electron hole, in the film.