Advances at Oregon State University in manufacturing technology for “quantum dots” may soon lead to a new generation of LED lighting that produces a more user-friendly white light, while using less toxic materials and low-cost manufacturing processes that take advantage of simple microwave heating.
The cost, environmental, and performance improvements could finally produce solid state lighting systems that consumers really like and help the nation cut its lighting bill almost in half, researchers say, compared to the cost of incandescent and fluorescent lighting.
The same technology may also be widely incorporated into improved lighting displays, computer screens, smart phones, televisions and other systems.
A key to the advances, which have been published in the Journal of Nanoparticle Research, is use of both a “continuous flow” chemical reactor, and microwave heating technology that’s conceptually similar to the ovens that are part of almost every modern kitchen.
The continuous flow system is fast, cheap, energy efficient and will cut manufacturing costs. And the microwave heating technology will address a problem that so far has held back wider use of these systems, which is precise control of heat needed during the process. The microwave approach will translate into development of nanoparticles that are exactly the right size, shape and composition.
“There are a variety of products and technologies that quantum dots can be applied to, but for mass consumer use, possibly the most important is improved LED lighting,” said Greg Herman, an associate professor and chemical engineer in the OSU College of Engineering.
“We may finally be able to produce low cost, energy efficient LED lighting with the soft quality of white light that people really want,” Herman said. “At the same time, this technology will use nontoxic materials and dramatically reduce the waste of the materials that are used, which translates to lower cost and environmental protection.”
Some of the best existing LED lighting now being produced at industrial levels, Herman said, uses cadmium, which is highly toxic. The system currently being tested and developed at OSU is based on copper indium diselenide, a much more benign material with high energy conversion efficiency.
Quantum dots are nanoparticles that can be used to emit light, and by precisely controlling the size of the particle, the color of the light can be controlled. They’ve been used for some time but can be expensive and lack optimal color control. The manufacturing techniques being developed at OSU, which should be able to scale up to large volumes for low-cost commercial applications, will provide new ways to offer the precision needed for better color control.
By comparison, some past systems to create these nanoparticles for uses in optics, electronics or even biomedicine have been slow, expensive, sometimes toxic and often wasteful.
Oher applications of these systems are also possible. Cell phones and portable electronic devices might use less power and last much longer on a charge. “Taggants,” or compounds with specific infrared or visible light emissions, could be used for precise and instant identification, including control of counterfeit bills or products.
The Latest on: Quantum dot LEDs
[google_news title=”” keyword=”Quantum dot LEDs” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Quantum dot LEDs
- Revolutionary quantum dot solar cell achieves record-breaking efficiencyon February 21, 2024 at 10:49 pm
Professor Jang said, "Our developed technology has achieved an impressive 18.1% efficiency in QD solar cells. This remarkable achievement represents the highest efficiency among quantum dot solar ...
- Revolutionary breakthrough in solar energy: Most efficient QD solar cellson February 21, 2024 at 8:14 pm
A research team has unveiled a novel ligand exchange technique that enables the synthesis of organic cation-based perovskite quantum dots (PQDs), ensuring exceptional stability while suppressing ...
- Gov. Pritzker earmarks $500 million for quantum tech in Illinois budgeton February 20, 2024 at 4:00 pm
The U.S. Department of Commerce last year named the local region an official U.S. Tech Hub for quantum technologies. Called The Bloch, the coalition of industry, academic, government and nonprofit ...
- Quantum computing startup Diraq boosts Series A with an extra $23 millionon February 14, 2024 at 5:41 pm
The round was led by Paris-based Quantonation, the world’s first VC fund dedicated to quantum technologies. Also investing were John Higgins Family Investments and the University of New South Wales.
- Empa and ETH Zurich make perovskite quantum dots into brighter emitterson February 14, 2024 at 9:31 am
Tailor-made phospholipids form protective layer around the dots to improve performance.
- Quantum computing startup Diraq raises $15M to build qubits using traditional silicon chipson February 12, 2024 at 4:21 pm
Australian quantum computing startup Diraq Pty Ltd. said today it has closed on a $15 million capital raise that will be used to advance its research into a novel concept for building the physical ...
- Quantum leap: Diraq secures an extra $23 million in Series Aon February 12, 2024 at 11:00 am
Australian quantum computing startup Diraq has successfully secured $23 million in a Series A-2 funding round.
- Quantum startup Diraq secures additional $15m investment to Series A funding roundon February 12, 2024 at 9:02 am
Quantum computing startup Diraq has raised $15 million in a Series 2-A funding round. The round was led by specialist investor Quantonation, a venture capital fund dedicated to quantum technologies, ...
- Next-Gen Tumor Treatment: Metal-Free Nanozyme From Graphene Quantum Dotson February 10, 2024 at 12:05 pm
A team led by Professor Wang Hui at the Hefei Institutes of Physical Science, part of the Chinese Academy of Sciences, has developed a metal-free nanozyme using graphene quantum dots (GQDs). This ...
- QLED vs LED: which TV panel technology is better?on February 8, 2024 at 5:18 am
While these panel technologies may sound very similar, with LED standing for 'Light Emitting Diode' and QLED simply adding 'Quantum-dot' to the start of it, dig down into the details and you'll ...
via Bing News