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Quantum dots are nanoparticles that are currently most typically seen in displays in order to use the technology to detect light wavelengths on a sensor.
QDs are a class of semiconducting nanostructures with distinct optical and electrical features. In terms of tunable emission spectra, signal brightness, photostability, and other properties, they have considerable benefits over typical fluorescent organic dyes in chemical and biological applications.
The quantum effects of quantum dots, nanoparticles designed to be sensitive to specific frequencies, are mostly due to their small size. Because of their durability, sensitivity, and ease of use in manufacturing processes, they are particularly appealing for constructing new colour image sensors.
The Global Quantum dot image sensor market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
ST’s quantum dot sensor set for volume SWIR imaging.At the International Electronic Devices Meeting (IEDM), STMicroelectronics detailed a quantum dot shortwave infrared (SWIR) image sensor.
InGaAs has traditionally been used to make SWIR imaging detectors because it works well in this wavelength range when silicon does not. But the price of InGaAs sensors can reach the thousands of dollars.
Colloidal quantum dots (CQD) sensors can be configured to be inexpensive and sensitive to light in the shortwave infrared.
The SWIR imaging CQD sensor from STMicroelectronics is one of many commercial CQD sensors being offered by companies like SWIR Vision Systems, Emberion, and Imec.
The ST effort, however, demonstrates dedication to high-scale manufacturing and may allow SWIR imaging for consumer electronics and other higher volume applications.
The technology used by STMicroelectronics is based on thin films made of lead sulphide quantum dots. In the case of STMicroelectronics, they are created in solution with the deposition processes integrated into a CMOS semiconductor process.
The quantum efficiency of CQD technology for shortwave infrared sensors is less than that of InGaAs sensors, which is a drawback.
Although ST’s quantum dot SWIR image sensor doesn’t perform vastly better than CQD sensors from other manufacturers, it will be made accessible at a sizable scale and with the dependability that users of consumer electronics want.
