Improved photoluminescence and monodisperse performance of colloidal CdTe quantum dots with Cannula method

Colloidal quantum dots are nano semiconductor materials that have been found in many applications, producing multiple exciton generation, unique optical and electronic properties, adjustable in size and bandwidth. Synthesized QDs are expected to exhibit high photoluminescence quantum yield and monod...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2019, 36(4), 229, pp.625-634
Main Authors: Elibol, Erdem, Elibol, Pınar Sevim, Çadırcı, Musa, Tutkun, Nedim
Format: Article
Language:English
Subjects:
Biotechnology
Cadmium tellurides
Cannulae
Catalysis
Chemistry
Chemistry and Materials Science
Electronic
Excitons
Industrial Chemistry/Chemical Engineering
Inorganic
Materials (Organic
Materials Science
Medical materials
Optical properties
Photoluminescence
Quantum dots
Semiconductor materials
Size distribution
Synthesis
Thin Films
화학공학
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Summary:Colloidal quantum dots are nano semiconductor materials that have been found in many applications, producing multiple exciton generation, unique optical and electronic properties, adjustable in size and bandwidth. Synthesized QDs are expected to exhibit high photoluminescence quantum yield and monodisperse properties according to their application area. Cannula method was adapted together with the organometallic synthesis method for the first time in the literature to increase the photoluminescence quantum yield of organometallic CdTe QD and minimize the full width at half maximum value of the photoluminescence band. Injection of precursors by the Cannula method is much faster than the injecting with the conventional method of using a glass syringe, which limits the size distribution in the solution during synthesis. In addition, the fastest injection method using Cannula method yields the shortest full width half maximum value of 27.20 nm for CdTe QDs in the literature. The photoluminescence quantum yield value of the CdTe QDs synthesized by the classical method was 8.12±2.1%, while the photoluminescence quantum yield of the CdTe QDs synthesized by the Cannula method was increased to 25.66±2.1%.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-019-0243-9