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Temperature and power dependence of photoluminescence in PbS quantum dots nanoparticles


Zaini, Muhammad Safwan and Ahmad Kamarudin, Mazliana and Liew, Josephine Ying Chyi and Alang Ahmad, Shahrul Ainliah and Mohmad, Abdul Rahman (2019) Temperature and power dependence of photoluminescence in PbS quantum dots nanoparticles. Sains Malaysiana, 48 (6). pp. 1281-1288. ISSN 0126-6039


In this study, the synthesis and the effect of temperature and power excitation towards photoluminescence (PL) emission of colloidal PbS quantum dots (QDs) were reported. Water soluble PbS QDs capped with a mixture of 1-thioglycerol (TGL) and dithioglycerol (DTG) was synthesized via colloidal chemistry method at room temperature. The PL emission of PbS QDs was investigated under temperature range from 10 K to 300 K and we found that the PL emission blue-shifted when the temperature is increased. From high resolution transmission electron microscopy (HRTEM), the average size of PbS core QDs is determined to be 6 nm and the integrated PL intensity (IPL) versus excitation power density shows the recombination of electrons and holes occur efficiently at low and high temperature for the PbS QDs. Full width half maximum (FWHM) shows a gradual broadening with the increasing temperature due to the interaction of charge carriers with phonons.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.17576/jsm-2019-4806-16
Publisher: Penerbit Universiti Kebangsaan Malaysia
Keywords: Near infrared; PbS; Photoluminescence; Quantum dots
Depositing User: Mr. Sazali Mohamad
Date Deposited: 01 Feb 2021 19:55
Last Modified: 01 Feb 2021 19:55
Altmetrics: http://www.altmetrics.com/details.php?domain=pasir.upm.edu.my&doi=10.17576/jsm-2019-4806-16
URI: http://psasir.upm.edu.my/id/eprint/82148
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