Using Cadmium Free Quantum Dots in Electronic Displays

Quantum dots possess huge potential for use in electronic display technology due to their ability to provide better, more dazzling color than current ranges of standard technology.

Despite this potential, the use of cadmium in quantum dots has limited their uptake. This has kept manufacturers from taking advantage of the technology’s benefits. RoHS regulations currently state that 1,000 ppm cadmium can be used, but in time this exception will expire and the amount of cadmium permitted for use will drop to only 100 ppm.

Despite this, study into the synthesis and mass production of cadmium-free dots is very promising.

One of the biggest trends in electronics manufacturing is reducing the use of materials that have the potential to harm. Although knowledge of substances like PCBs might be more widespread, the concern over the use of harmful materials is equally relevant for display technologies. As such, display manufacturers must be mindful of laws concerning the use of cadmium-based quantum dots.

In 2015, the European Parliament banned the use of cadmium in devices used for displays and lighting. Additionally, controls and regulations concerning the use of cadmium are growing in Asia, with China bringing in new laws of its own. With this reality, display manufacturers are shifting from cadmium-based quantum dots and investing in cadmium-free quantum dot technology.

Displays in the future must operate in line with guidelines while also matching consumer demands. As a result, cadmium-free quantum dot displays will soon be in routine use and are expected to take over the market due to their strong performance and their benefits regarding safety and their effect on the environmental.

Cadmium-free quantum dots provide an alternative with fewer safety risks and harmful effects on the environment for both producers and consumers. They will provide both parties with color enhancements without the risks of toxicity or liability.

Cadmium-Free Quantum Dot Applications

Cadmium-free quantum dots also possess the potential for an extended range of applications in areas such as lighting, solar energy, and biomedicine.

When used in LED lighting, cadmium-free quantum dots offer excellent color quality without reducing device efficiency. Areas in which the quality of color is vital to include high-end retail stores, surgical applications, and in agriculture. LEDs provide a range of advantages to the grow-light and horticultural lighting industry by boosting chlorophyll absorption peaks and resulting in healthier plants providing higher yields.

Another use for cadmium-free quantum dots is in solar power. Quantum dots can be positioned on thin films to make solar cells that are economical to produce. Producers of solar panels can use basic, low-cost printing technologies to place nanoparticles onto the films.

Applications for LEDs also extend to biomedicine, where scientists are evaluating using quantum dots as a way to light up tumors using colors to improve the safety and efficacy of cancer surgery. Doctors could potentially use cadmium-free quantum dots to illuminate molecules that can bind to carcinogenic tumors, enabling the surgeon to identify healthy from diseased tissue easily. For this use, the quantum dots are more stable than the contrast dyes surgeons use today, allowing the illuminated cells to remain bright for longer periods. This can give the surgeon more time to carry out any necessary surgery and possibly improve disease outcomes.

Cadmium-Free Quantum Dots from Avantama

As legislation begins to limit the use of cadmium, cadmium-free quantum dots are well placed as future-proof lighting and display technology. Due to this innovative technology, the future looks brighter and safer for manufacturers, consumers and a huge range of other applications that will begin to utilize cadmium-free quantum dots.

Avantama have developed and manufacture a range of cadmium-free quantum dots perfect for display applications. If you need more information about our solutions, please contact us.

This information has been sourced, reviewed and adapted from materials provided by Avantama AG.

For more information on this source, please visit Avantama AG.

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