KJ Ceramics 31

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Detailed Program

Paper Number : NA-P10

Time Frame : 12:00~13:30

Presentation Date : Friday, 28, November

Session Name : Nano-particles & Nano-structured Materials

Session Chair 1# :

Session Chair 2# :

Flow Rate Effects of CdSe Quantum Dots Synthesized by Microreactor

Da-Woon Jeong

Korea Institute of Industrial Technology

Keywords: CdSe, Quantum dot, Phosphor, Flow Rate, Microreactor

The size controlled Quantum dots are capable of controlling the typical emission wavelength and the absorption wavelength by particle size of a few nanometers. Recently, researches that applied these properties are in progress in various fields. Because electrical-, optical-properties are depend on the size of the quantum dots, the synthesizing condition such as flow rate of suspension is one of important process parameter. Continuous process of real-time microreactor is possible to control in-situ process parameters such as temperature, reaction time related flow rates each precursors.
The Cd(CH3COO)∙2H2O(Cadmium acetate dihydrate, 98%, Aldrich) was dissolved by Oleic acid(90%, Aldrich) and 1-Octadecene(O.D.E, 90%, Aldrich) mixture at 160℃ under argon flow. The Se power (99.99%, Aldrich) was dissolved in Trioctylphosphine(T.O.P, 97%, Aldrich) at room temperature. The CdSe quantum dots synthesized on various flow rates, and characterized photo-luminescence, band-gap behaviors and microstructures.
The luminescence wavelength increased from 503 to 609 nm with decreasing flow rate of the Se precursor from 0.15 to 0.03 ml/min. The bad-gap energy decreased from 2.31 to 2.03 eV in the flow rate range.

Acknowledgements :

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