HgCdTe Quantum Dot over Interdigitated Electrode for Mid-Wave Infrared Photon Detection and Its Noise Characterization

Chatterjee, A and Jagtap, A and Pendyala, N and Rao, KSRK (2020) HgCdTe Quantum Dot over Interdigitated Electrode for Mid-Wave Infrared Photon Detection and Its Noise Characterization. In: International Journal of Nanoscience, 19 (3).

PDF Int_Jou_Nan_19_3_2020.pdf - Published Version Restricted to Registered users only Download (694kB) | Request a copy

Abstract

In this paper, we report the development of mid-wave infrared (MWIR) photon sensor using solution-processed mercury cadmium telluride (Hg1-xCdxTe) semiconductor colloidal quantum dots (CQDs) coated over interdigitated metallic electrode structure, having significant response in the MWIR spectral band range (λ=2.5-5.0μm) at room temperature. HgCdTe CQD has been chemically synthesized. We have characterized the optical and 1/f noise performances of the developed sensor to understand its behaviors at different operating biases as an introductory step toward development of large-format MWIR focal-plane arrays having similar pixel structure. The optimum biasing conditions have been experimentally evaluated at room temperature. We have achieved a noise equivalent power (NEP) of 2.5pW at 1.5-V bias voltage which corresponds to detectivity (D) in the order of 10°8. This work highlights the development of low-cost colloidal HgCdTe quantum dot photodetectors and their utility in the monolithic infrared focal-plane arrays.

Item Type:	Journal Article
Publication:	International Journal of Nanoscience
Publisher:	World Scientific
Additional Information:	The copyright for this article belongs to World Scientific.
Keywords:	Cadmium alloys; Cadmium telluride; Electrodes; Focal plane arrays; Focusing; II-VI semiconductors; Mercury amalgams; Mercury compounds; Nanocrystals; Narrow band gap semiconductors; Photodetectors; Photons; Semiconductor alloys; Semiconductor quantum dots; Sols; Structural optimization, 1/F noise; HgCdTe; Infrared focal plane arrays; Inter-digitated electrodes; Mercury cadmium telluride; Mid wave infrared (MWIR); MWIR; Quantum-dot photodetectors, Infrared radiation
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	06 Feb 2023 07:23
Last Modified:	06 Feb 2023 07:23
URI:	https://eprints.iisc.ac.in/id/eprint/79885

Actions (login required)

View Item