US cadmium-free quantum dot manufacturer Quantum Materials says it has developed a continuous flow manufacturing process to produce stable, low-cost, high-purity perovskite quantum dots (PQDs). So far, the commercialisation of these materials has been hampered due to inabilities to produce large volumes of these materials at low cost points while still achieving long-term reliability, the company said.
“Perovskites have demonstrated conversion efficiencies of 22.7% which is higher than dye-sensitised or thin-film technologies, and they can also extend efficiency (up to 1.3 times) of silicon PVs when coated as an absorption enhancement layer,” the company added. “High-purity PQDs could potentially achieve high conversion efficiency while also solving many of the reliability and stability challenges”.
According to Quantum Materials, PQDs could provide improved colour gamut due to their extremely narrow emission wavelength profile. “For comparison, low-cadmium or cadmium-free QLED displays can only deliver roughly an 80% Rec. 2020 coverage, while PQDs have the ability to deliver roughly 98% coverage”. The company claims it is the first to adapt a mature mass-production technology to perovskite quantum dot production. CEO Stephen Squires concluded:
“As we
are approaching the final stage of bringing to market our first commercial level red-green QD-infused film component, we see tremendous potential in advancing the performance level of our QD-based film components even further with the incorporation of PQDs, to bring the colour gamut up to nearly 100% Rec. 2020 coverage, which will set a new standard in flat panel display colour rendering”.
