Colloidal PbS nanocrystals with narrow photoluminescence spectra

M. Sasani Ghamsari, Shahidan Radiman, Mohd. Ambar Yarmo, Muhammad Azmi Abdul Hamid, A. Bananej, Irman Abdul Rahman

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Luminescent PbS nanocrystals have been synthesized by the colloidal method. PVA has been employed to modify the surface of prepared PbS nanocrystals and improve their optical properties. Optical and morphological characteristics of lead sulfide nanocrystals have been studied by high resolution electron microscopy and spectrophotometer. Optical absorption and photoluminescence (PL) studies of the PbS nanocrystals have shown the strong quantum confinement effects. For the first time, the prepared lead sulfide nanocrystals have emitted at 608 nm wavelength with narrow band width (21 nm) and high Stokes shift. Experimental results have shown that the surface charge traps have higher contribution to the optical properties of colloidal PbS nanocrystals and in our sample photoluminescence was due to hole relaxation. These properties made them a material with potential application in nanophotonics.

Original languageEnglish
Pages (from-to)1381-1384
Number of pages4
JournalMaterials Letters
Volume65
Issue number9
DOIs
Publication statusPublished - 15 May 2011

Fingerprint

Nanocrystals
Photoluminescence
nanocrystals
photoluminescence
lead sulfides
Optical properties
Lead
Nanophotonics
optical properties
Quantum confinement
High resolution electron microscopy
Spectrophotometers
spectrophotometers
Surface charge
Light absorption
narrowband
electron microscopy
optical absorption
traps
bandwidth

Keywords

  • Narrow bandwidth
  • PbS nanocrystals
  • Photoluminescence
  • Stokes shift

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Colloidal PbS nanocrystals with narrow photoluminescence spectra. / Ghamsari, M. Sasani; Radiman, Shahidan; Yarmo, Mohd. Ambar; Abdul Hamid, Muhammad Azmi; Bananej, A.; Abdul Rahman, Irman.

In: Materials Letters, Vol. 65, No. 9, 15.05.2011, p. 1381-1384.

Research output: Contribution to journalArticle

Ghamsari, M. Sasani ; Radiman, Shahidan ; Yarmo, Mohd. Ambar ; Abdul Hamid, Muhammad Azmi ; Bananej, A. ; Abdul Rahman, Irman. / Colloidal PbS nanocrystals with narrow photoluminescence spectra. In: Materials Letters. 2011 ; Vol. 65, No. 9. pp. 1381-1384.
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AU - Abdul Rahman, Irman

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