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Proceedings Paper

Highly red luminescence properties from ternary ZnCdTe quantum dots
Author(s): Norhayati Abu Bakar; Akrajas Ali Umar; Muhamad Mat Salleh; Muahamad Yahaya; Burhanuddin Yeop Majlis
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Paper Abstract

This paper reports the synthesis of ternary ZnCdTe quantum dots (QD) system with highly luminescent in the red region. The ternary QD system was prepared by quick injection of trioctylphosphine telluride (TOPTe) into a reactor that contains a hot mixed cadmium and zinc precursors, trioctylphosphine oxide and oleic acid at temperature of as low as 300°C. After the injection of TOPTe, the reaction was left undisturbed for a period of time to facilitate the growth of QDs and then quenched the reaction at a certain period of time. Photoluminescence analysis found that the ZnCdTe QDs exhibited highly luminescent properties with the quantum yield was calculated as high as ca. 60%. The emission wavelength was found to be in the range of 640 to 675 nm. It was also found that the QDs showed a relatively narrow spectral width, namely ca. 28 nm, reflecting a narrow quantum dots size distribution. Owing to their interesting photoluminescence properties, the ternary ZnCdTe QDs should find an extensive used in light-emitting diode, solar cell, laser and biolabelling.

Paper Details

Date Published: 20 October 2009
PDF: 6 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74935W (20 October 2009); doi: 10.1117/12.839808
Show Author Affiliations
Norhayati Abu Bakar, Univ. Kebangsaan Malaysia (Malaysia)
Akrajas Ali Umar, Univ. Kebangsaan Malaysia (Malaysia)
Muhamad Mat Salleh, Univ. Kebangsaan Malaysia (Malaysia)
Muahamad Yahaya, Univ. Kebangsaan Malaysia (Malaysia)
Burhanuddin Yeop Majlis, Univ. Kebangsaan Malaysia (Malaysia)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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