St Micro 228 Apr 2022 10:36
Then look at this article too:
https://www.edisongroup.com/investment-themes/quantum-dots-all-the-colours-of-the-rainbow/29972/
“The second report in this series, which focuses on laser diodes, discusses applications such as 3D sensing which are driving demand for laser diodes emitting in the NIR and SWIR regions of the spectrum, that is the section from 900nm out to 1,800nm. OEMs are shifting to longer wavelengths in order for LiDAR to be eye-safe and, in the case of mobile phones, able to be located under the OLED screen rather than in a cutaway. These applications require cost-effective sensors that can detect light at these wavelengths if they are to be widely adopted. Silicon sensors have adequate sensitivity in the visible part of the spectrum, but not in the IR part. Sensitivity is particularly important for mobile device users because higher sensitivity results in lower power consumption and thus a longer time between charges. Sensors based on the compound semiconductor indium gallium arsenide (InGaAs) are sufficiently sensitive but substantially more expensive than silicon to manufacture. Moreover, a silicon sensor can readily be integrated with a silicon-based readout circuit, further reducing cost while a compound semiconductor one cannot. Depositing a layer of QDs tuned to the IR frequency of interest on the sensor potentially provides a cost-effective route for improving the range and sensitivity of sensors, though it has yet to be commercialised.”
ST Microelectronics ready to commercialise QD photodetector platform technology
In May 2021, ST presented a paper at the Society for Information Display’s annual symposium. This announced that the company was ready to commercialise its QD photodetector platform technology and intended to have 940nm engineering samples ready for release to early adopters during calendar H221 and SWIR (<1,400nm) samples ready during calendar 2022. The paper noted that the technology held great promise for enabling lower cost (100–1,000 times lower), high-performance, high-resolution, large spectral response image sensors, which would potentially drive large SWIR imaging growth. It identified initial opportunities in mobile devices, miniature spectrometers and hyperspectral imaging, machine vision and advanced driver assistance, noting that the variant currently at R&D scale was likely to surpass the required performance specifications including sensor speed for time-of-flight applications in future. Belgian research institute IMEC and camera manufacturer SWIR Vision Systems also presented papers on the use of QDs in infra-red imaging at the same event.
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