Issue 14, 2023

Mercury chalcogenide colloidal quantum dots for infrared photodetection: from synthesis to device applications

Abstract

Commercial infrared (IR) photodetectors based on epitaxial growth inorganic semiconductors, e.g. InGaAs and HgCdTe, suffer from high fabrication cost, poor compatibility with silicon integrated circuits, rigid substrates and bulky cooling systems, which leaves a large development window for the emerging solution-processable semiconductor-based photo-sensing devices. Among the solution-processable semiconductors, mercury (Hg) chalcogenide colloidal quantum dots (QDs) exhibit unique ultra-broad and tuneable photo-responses in the short-wave infrared to far-wave infrared range, and have demonstrated photo-sensing abilities comparable to the commercial products, especially with advances in high operation temperature. Here, we provide a focused review on photodetectors employing Hg chalcogenide colloidal QDs, with a comprehensive summary of the essential progress in the areas of synthesis methods of QDs, property control, device engineering, focus plane array integration, etc. Besides imaging demonstrations, a series of Hg chalcogenide QD photodetector based flexible, integrated, multi-functional applications are also summarized. This review shows prospects for the next-generation low-cost highly-sensitive and compact IR photodetectors based on solution-processable Hg chalcogenide colloidal QDs.

Graphical abstract: Mercury chalcogenide colloidal quantum dots for infrared photodetection: from synthesis to device applications

Article information

Article type
Review Article
Submitted
31 Dec. 2022
Accepted
03 Marts 2023
First published
09 Marts 2023

Nanoscale, 2023,15, 6476-6504

Mercury chalcogenide colloidal quantum dots for infrared photodetection: from synthesis to device applications

Y. Tian, H. Luo, M. Chen, C. Li, S. V. Kershaw, R. Zhang and A. L. Rogach, Nanoscale, 2023, 15, 6476 DOI: 10.1039/D2NR07309A

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