Couldn't help notice the image of the quick test of the red LED, which reminded me of the review undertaken by Dominique Morrison 'Assessment of BluGlass RPCVD technology' back in 21st March 2020. Extract from 4.4 MicroLEDs
Blue and Green GaN-based MicroLEDs are currently achievable using MOCVD. However, GaN-based red LEDs are not currently available. Current MicroLED displays utilise a different material system (AlGaInP/GaAs) to produce the red LED. From a performance and manufacturing perspective, it is highly desirable to produce all three colours (RGB) for a MicroLED display out of the same material system. Hence, there is great interest in developing a red GaN-based LED. A key challenge in achieving a red GaN based LED, is in the growth of good quality Indium-rich InGaN layers that produce the active region of the device (where the light is generated). Whilst very low growth temperatures are required to incorporate the large amounts of indium, the MOCVD process favours higher growth temperatures to achieve the best quality material.
There is strong interest (from other existing BluGlass customers) in the use of RPCVD to grow the In-rich layers for long wavelength LEDs (green, yellow, amber and red) due to the lower growth temperature.
BluGlass have commenced work on Red MicroLED but this work is deemed to be early stage R&D. As a result, the predicted timeline for this work is not yet clear. Red MicroLED research is of particular interest to key players in the field, such as the major LED players and some other big names including Apple, Google, Facebook and Samsung, since there is low confidence that MOCVD will be capable of delivering a MicroLED solution.
BluGlass are seeking collaboration partners to fund additional activities in this area. BluGlass will seek to license the technology upon proof of concept.
Looks like we've achieved this, or am I missing something? Would expect this to be discussed at SPIE next weekend. Interesting times!
DYOR
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