Canon develops perovskite quantum-dot inks for use in next-generation displays
Canon today announced the development a quantum-dot ink with a perovskite structure (perovskite quantum-dot ink) as a material for next-generation quantum-dot displays, and has successfully demonstrated its practical durability for the first time in the world. Quantum dots are semiconductor nanocrystals that measure only a few nanometers in diameter and can emit light with high brightness and high color purity. Displays with quantum-dot technology are attracting growing attention due to their wide color gamut that makes possible high visual expressiveness.
Quantum dots for display is sought to achieve higher color purity and higher light utilization efficiency. In addition, though cadmium (Cd) has thus far been the preferred material for quantum dots, due to environmental concerns, there is a growing interest in Cd-free materials. With these requirements in mind, Canon has focused on the development of perovskite quantum-dot inks. Perovskite quantum dots are considered an effective Cd-free approach other than InP (indium phosphide) quantum dots.
InP quantum-dot ink covers 88% of the color gamut based on the ITU-R BT. 2020 recommendation, while Canon’s perovskite quantum-dot inks can cover 94% of the gamut. The high efficiency of light use is expected to reduce power consumption of quantum dots by approximately 20% compared to conventional technology. Canon’s quantum-dot inks have the potential to help realize next-generation OLED displays with ultra-high definition, such as quantum-dot 8K displays, a technology that thus far has been unachievable.