THE INFLUENCE OF SYNTHESIS CONDITIONS ON  THE OPTICAL PROPERTIES OF CdTe QUANTUM DOTS

Phạm Thị Thủy; Nguyễn Thị Ngọc Huệ; Trần Thị Kim Chi

doi:10.34238/tnu-jst.12739

THE INFLUENCE OF SYNTHESIS CONDITIONS ON THE OPTICAL PROPERTIES OF CdTe QUANTUM DOTS

About this article

Received: 07/05/25 Revised: 17/10/25 Published: 20/10/25

Authors

1. Pham Thi Thuy , Sai Gon University
2. Nguyen Thi Ngoc Hue, 1) Sai Gon University, 2) Ba Dinh Junior High School
3. Tran Thi Kim Chi, Institute of Materials Science - VAST

Abstract

This study presents the synthesis of CdTe semiconductor quantum dots in aqueous medium by hydrothermal method, using MSA acid as surfactant. Technological parameters such as solution pH, molar ratio between precursors (Cd:Te) and surfactant concentration (Cd:MSA) were systematically investigated to evaluate the influence on the formation process, size, uniformity and optical properties of quantum dots. The results showed that the synthesis conditions had a significant impact on the controllability of particle size and luminescence performance of the material. Changes in pH and Cd:Te ratio affected the crystallinity, particle size and emission properties of CdTe quantum dots. In addition, the surfactant played a role in stabilizing the particle surface and limiting agglomeration, thereby improving the optical quality. The results obtained in this study not only clarify the relationship between the fabrication conditions and properties of CdTe quantum dots but also contribute to the development of high-performance semiconductor nanomaterial systems in practical applications such as optoelectronic devices, biosensors and renewable energy.

Keywords

Hydrothermal; CdTe; Quantum dot; Optical properties; Semiconductor

Full Text:

PDF (Tiếng Việt)

References

[1] D. M. Yerga, M. B. G. García, and A. C. García, “Biosensor array based on the in situ detection of quantum dots as electrochemical label,” Sens. Actuators B, vol. 182, pp.184–189, 2013.

[2] T. H. Nguyen et al., “Influence of Eu doping on the structural and optical properties of Zn_1-xEu_xSe quantum dots,” Journal of Physics and Chemistry of Solids, vol. 148, 2021, Art. no. 109729.

[3] M. Nayeripour, M. Mansouri, E. Waffenschmidt, Solar Cells, IntechOpen, 2020.

[4] J. Xu, R. Hu, Q. Wang, P. Wang, and H. Bao, “Extracellular biosynthesis of biocompatible CdSe quantum dots,” IET Nanobiotechnol, vol. 13, pp. 962–966, 2019.

[5] D. V. Nguyen et al., “Effect of dopant concentration and the role of ZnS shell on optical properties of Sm³⁺ doped CdS quantum dots,” RSC Adv, vol. 11, pp. 7961-7971, 2021.

[6] Q. Dai, D. Li, S. Jiang, H. Chen, Y. Wang, S. Kan, B. Liu, Q. Cui, and G. Zou, “Synthesis of monodisperse CdSe nanocrystals directly open to air: Monomer reactivity tuned by the selenium ligand,” Journal of Crystal Growth, vol. 292, pp. 14–18, 2006.

[7] Q. Dai, S. Kan, D. Li, S. Jiang, H. Chen, M. Zhang, S. Gao, Y. Nie, H. Lu, Q. Qu, and G. Zou, “Effect of ligands and growth temperature on the growth kinetics and crystal size of colloidal CdSe nanocrystals,” Materials Letters, vol. 60, pp. 2925–2928, 2006.

[8] L. Qu and X. Peng, “Control of Photoluminescence Properties of CdSe Nano-crystals in Growth,” J. Am. Chem. Soc, vol. 124, pp. 2049-2055, 2002.

[9] H. Ke, D. Rui, D. Wenqing, L. Ling, Z. Ai, and Y. Xin, “Aqueous synthesis of CdTe quantum dots by hydride generation for visual detection of silver on quantum dot immobilized paper,” Analytical methods, vol. 9, pp. 5339-5347, 2017.

[10] K. Agne, B. Saulius, and R. Ricardas, “The dose-dependent photobleaching of CdTe quantum dots in aquauos media,” Luminescence, vol. 201, pp. 434-441, 2018.

[11] W. W. Yu, L. Qu, W. Guo, and X. Peng, “Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals,” Chem. Mater, vol. 15, pp. 2854-2860, 2003.

[12] X. C. Nguyen et al., “Controlling the optical and magnetic properties of CdTeSe and Gd-doped CdTeSe alloy semiconductor nanocrystals,” RSC Adv, vol. 13, 2023, Art. no. 36455.

[13] Y. C. Suk, P. S. Jong, S. K. Dong, Y. K. Tae, and S. S. Kwang, “Aqueous Synthesis of CdTe Quantum Dot Using Dithiol-Functionalized Ionic Liquid,” Nanomaterials, vol. 8, 2012, Art. no. 519458.

[14] D. V. Talapin, S. Haubold, A. L. Rogach, A. Kornowski, M. Haase, and H. Weller, “Novel Organometallic Synthesis of Highly Luminescent CdTe Nanocrystals,” J. Phys. Chem. B, vol. 105, no. 12, pp. 2260–2263, 2001.

[15] E. Ying, D. Li, S. Guo, S. Dong, and J. Wang, “Synthesis and bio-imaging application of highly luminescent mercaptosuccinic acid-coated CdTe nanocrystals,” PLoS ONE, vol. 3, no. 5, 2008, Art. no. 2222.

[16] Y. Zhang, H. Zhang, M. Ma, X. Guo, and H. Wang, “The influence of ligands on the preparation and optical properties of water-soluble CdTe quantum dots,” Appl. Surf. Sci, vol. 255, pp. 4747–4753, 2009.

DOI: https://doi.org/10.34238/tnu-jst.12739

Refbacks

There are currently no refbacks.



Remember me