Detection of mid-infrared by HgTe colloidal quantum dots at room temperature

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review

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Detail(s)

Original languageEnglish
Title of host publication16th International Conference on Nanotechnology - IEEE NANO 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages494-497
ISBN (Print)9781509039142
Publication statusPublished - 21 Nov 2016

Conference

Title16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
PlaceJapan
CitySendai
Period22 - 25 August 2016

Abstract

Infrared sensing devices rely on narrow band gap semiconductors grown by expensive and complicated methods such as molecular beam epitaxy and chemical vapor deposition. Colloidal quantum dots (CQDs) offer a low-cost alternative to detect infrared light. In this study, we have successfully demonstrated synthesis of HgTe quantum dots, which can absorb midwave infrared (MWIR) at room temperature. The maximum absorption wavelength can be tuned by controlling the reaction time and reaction temperature of synthesis of the CQDs. Through simple drop-casting and cross-linking treatment, the HgTe CQDs MWIR detector can be fabricated, and we demonstrated detection of MWIR with a responsivity of 0.57 mA/W for infrared signal with wavelength of 3 ìm at room temperature. The results pave the way for the development of low-cost midwave infrared detectors.

Citation Format(s)

Detection of mid-infrared by HgTe colloidal quantum dots at room temperature. / Tang, Xin; Lai, King Wai Chiu.

16th International Conference on Nanotechnology - IEEE NANO 2016. Institute of Electrical and Electronics Engineers Inc., 2016. p. 494-497 7751413.

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review