Steckel 202415 Jun 2024 07:15
Https://sid.onlinelibrary.wiley.com/doi/10.1002/msid.1483
After 25 years in the field of colloidal QD technology, I have gained an important insight. The real value proposition for colloidal QD technology in products is not using them to compete with traditional semiconductors in small form factors, but instead taking advantage of the fact that QD technology enables the realization of large-area and low-cost fabrication of components and devices. Colloidal QD technology is a solution-based semiconductor technology, where the QDs are made in solution, purified and surface modified in solution, and processed into components and devices out of solution. The future of semiconductor technology could be solution-processed semiconductor fabrication over large area (meters-squared).
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Current image sensor technology leverages the use of silicon (Si) CMOS to drive QD sensor pixels. This means that cost will be constrained by the size of a Si wafer used to make devices, which today is only 300 mm (maximum). This could increase in the future, but the real value of leveraging solution-processable colloidal QD technology to make sensors and other optoelectronic devices is by fabricating them on meters-squared areas. Accomplishing this may require a move from Si wafer-based CMOS to colloidal QD, organic electronics, or other large-area and low-cost thin-film electronic technologies on foil, plastic, or glass to drive sensor arrays. When fabricated over meters squared, the cost will dramatically decrease. Larger-area sensor arrays can be leveraged for future applications in displays and human-machine interfaces, where all sensing modalities can be built into a single sensor array using lens-less sensing with the help of AI to create images and to process useful data captured over a large area.
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