Temperature and power dependence of photoluminescence in PbS quantum dots nanoparticles

Muhammad Safwan Zaini, Mazliana Ahmad Kamarudin, Josephine Liew Ying Chyi, Shahrul Ainliah Alang Ahmad, Abdul Rahman Mohmad

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)1281-1288
Number of pages8
JournalSains Malaysiana
Volume48
Issue number6
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

quantum dots
photoluminescence
nanoparticles
temperature dependence
temperature
excitation
radiant flux density
charge carriers
phonons
chemistry
transmission electron microscopy
high resolution
room temperature
synthesis
water
electrons
interactions

Keywords

  • Near infrared
  • PbS
  • Photoluminescence
  • Quantum dots

ASJC Scopus subject areas

  • General

Cite this

Temperature and power dependence of photoluminescence in PbS quantum dots nanoparticles. / Zaini, Muhammad Safwan; Kamarudin, Mazliana Ahmad; Ying Chyi, Josephine Liew; Alang Ahmad, Shahrul Ainliah; Mohmad, Abdul Rahman.

In: Sains Malaysiana, Vol. 48, No. 6, 01.01.2019, p. 1281-1288.

Research output: Contribution to journalArticle

Zaini, Muhammad Safwan ; Kamarudin, Mazliana Ahmad ; Ying Chyi, Josephine Liew ; Alang Ahmad, Shahrul Ainliah ; Mohmad, Abdul Rahman. / Temperature and power dependence of photoluminescence in PbS quantum dots nanoparticles. In: Sains Malaysiana. 2019 ; Vol. 48, No. 6. pp. 1281-1288.
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