Interband and intraband optical transitions in mercury chalcogenide colloidal quantum dots

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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Author(s)

Detail(s)

Original languageEnglish
Title of host publication2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)
PublisherInstitute of Electrical and Electronics Engineers, Inc.
Pages641-644
ISBN (electronic)9781509030286
ISBN (print)9781509030293
Publication statusPublished - Jul 2017

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
Volume2017
ISSN (electronic)1944-9380

Conference

Title17th IEEE International Conference on Nanotechnology (IEEE NANO 2017)
LocationPittsburgh Marriott City Center
PlaceUnited States
CityPittsburgh
Period25 - 28 July 2017

Link(s)

DOI

DOI
Check@CityULib
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-85041205068&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(b0723d8b-7a18-4615-9a35-0d7a74bbaec1).html

Abstract

We study the optical transitions in mercury chalcogenide colloidal quantum dots (CQDs) by using Fourier transform infrared spectrometer. The optical absorption measurements revealed distinct optical transition processes in mercury telluride (HgTe) CQDs and mercury selenium (HgSe) CQDs. The results show that the spectral absorbance of HgTe CQDs is broadband, which is originated from the interband optical transition between valence band to conduction band, while that of HgSe CQDs is narrowband. And we speculate that the narrowband absorption is resulted from the intraband transition in HgSe CQDs. Furthermore, both the interband energy gaps of HgTe CQDs and intraband energy gaps of HgSe CQDs have been estimated based on the spectral absorbance. The extracted energy gaps are in good agreement with the calculated values by two-band Kroning-Penny model.

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Publication fingerprints text

100
Quantum Dot Engineering
100
Optical Transition Engineering
100
Chalcogenides Physics
33
Band Gap Engineering
11
Good Agreement Engineering
11
Valence Band Engineering
11
Absorption Measurem... Engineering
11
Fourier Transform I... Engineering
11
Absorptivity Engineering
11
Conduction Band Engineering
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Citation Format(s)

[ RIS ] [ BibTeX ]
Interband and intraband optical transitions in mercury chalcogenide colloidal quantum dots. / Tang, Xin; Wu, Guangfu; Lai, King Wai Chiu.
2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO). Institute of Electrical and Electronics Engineers, Inc., 2017. p. 641-644 8117308 (Proceedings of the IEEE Conference on Nanotechnology; Vol. 2017).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review