Knocking the spots off quantum dots: Helio plots path to production for perovskite display materials

Link to this article in Chinese 远远胜过量子点: Helio描绘了钙钛矿显示材料的生产路径

Remarkable perovskite-based display materials that were jointly invented within Cambridge and Oxford Universities are moving to pilot-scale production at Helio Display Materials. The materials enable brighter, more colourful and lower power displays and will simplify next generation display architectures.

The materials generate light of the desired colour by converting light rather than filtering it which provides power savings of up to 40% and a step change improvement in colour 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 nanometre scale particles. Colour by composition massively simplifies the manufacturing process for perovskites vs. quantum dots and allows the use of standard chemical industry processes and equipment.

Perovskite materials efficiently convert blue light to red in the red sub-pixel and blue light to green in the green sub-pixel respectively. The materials will be supplied to the display maker as photoresists or inkjet inks. The incident blue light comes from efficient blue LEDs/microLEDs or a blue OLED layer depending on the display architecture.

Pilot-scale fabrication of perovskite materials is ramping up at Helio from Q1 2024 to provide the volumes and reproducibility needed to support product development and qualification by Helio’s customers. The expanded facility will also provide a platform for manufacturing process development in advance of the next step up in scale which is planned for 2025.

“From micro displays to wall TVs, Helio’s materials have huge potential across the range of display applications.” said Simon Jones, Helio CEO, “Not only do we win on light conversion performance, we need a tenth of the capital to reach volume production than was seen with quantum dots.”

This article was originally published in Business Weekly on the 7th December 2023. Image is Simon Jones, Helio CEO, with perovskite film samples.