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Colloidal Synthesis And Characterization Of Cdse Quantum Dots: Role Of Cd:Se Molar Ratio And Temperature
[Full Text]
AUTHOR(S)
Hakan Aydın, M. R. Karim, Mesut Balaban, Hilmi Unlu
KEYWORDS
Absorbance, HRTEM, Molar ratio, Photoluminescence, Particle size, Quantum dots, Temperature
ABSTRACT
Semiconductor Cadmium selenide (CdSe) Quantum Dots (QDs) were synthesized via colloidal chemistry method at moderately lower growth temperatures. Optical absorption and photoluminescence (PL) spectroscopy techniques were used to characterize the optical properties of CdSe QDs. Optical properties of colloidal CdSe QDs were successfully controlled by changing the initial Cd:Se molar ratios and temperature. Optical absorption and PL spectrum both showed gradual red shift with increasing Cd:Se molar ratio and temperature. High-resolution transmission electron microscopy (HRTEM) technique were used to study the structural properties of CdSe QDs. Full width at half maximum (FWHM) values obtained from the emission spectrums were helped to prove the narrow size distribution, which coincides with the matching results of HRTEM images and theoretical calculations.
REFERENCES
[1] P. A. Ajibade, “Synthesis and Use of [Cd(Detu)2(OOCCH3)2]•H2O as Single Molecule Precursor for Cds Nanoparticles.” The Scientific World Journal, 2013, 1-6.
[2] B. Y. Geng, X. W. Liu, J. Z. Ma, , Q. B. Du, , & L. D. Zhang, “Size-Dependent Optical and Electrochemical Band Gaps of ZnS Nanorods Fabricated Through Single,”Molecule Precursor Route. Applied Physics Letters, 90(18), 183106, 2007.
[3] Murcia, M. J., Shaw, D. L., Woodruff, H., Naumann, C. A., Young, B. A., & Long, E. C. (2006). Facile Sonochemical Synthesis of Highly Luminescent ZnS−Shelled CdSe Quantum Dots. Chemistry of Materials, 18(9), 2219-2225.
[4] N. A. Dhas, C. P. Raj and A. Gedanken, “Preparation of Luminescent Silicon Nanoparticles: A Novel Sonochemical Approach,” Chemistry of Materials, 10(11), 1998.
[5] Nam, D., Song, W., & Yang, H. Facile, “Air- Insensitive Solvothermal Synthesis of Emission-Tunable CuInS2/ZnS Quantum Dots with High Quantum Yields,” Journal of Materials Chemistry, 21(45), 18220, 2011..
[6] Wang, P., Jiang, T., Zhu, C., Zhai, Y., Wang, D., & Dong, S, ”One-Step, Solvothermal Synthesis of Graphene- CdS and Graphene-ZnS Quantum Dot Nanocomposites and Their Interesting Photovoltaic Properties,” Nano Research, 3(11), 794-799. 2010.
[7] Qian, H., Li, L., & Ren, J, “One-Step and Rapid Synthesis of High Quality Alloyed Quantum Dots (CdSe– CdS) in Aqueous Phase by Microwave Irradiation with Controllable Temperature,” Materials Research Bulletin, 40(10), 1726-1736, 2005.
[8] He, Y., Lu, H., Sai, L., Su, Y., Hu, M., Fan, C., et al., “Microwave Synthesis of Water-Dispersed CdTe/CdS/ZnS Core-Shell-Shell Quantum Dots with Excellent Photostability and Biocompatibility”. Advanced, 2008.
[9] Danek, M., Jensen, K. F., Murray, C. B., & Bawendi, M. G. Synthesis of Luminescent Thin-Film CdSe/ZnSe Quantum Dot Composites Using CdSe Quantum Dots Passivated with an Overlayer of ZnSe. Chemistry of Materials, 8(1), 173-180, 1996.
[10] Jiang, F., Wang, C., Shu, C., Gu, Y., Huang, N., Zheng, J., et al. Eco-Friendly Synthesis of Size-Controllable Amine-Functionalized Graphene Quantum Dots with Antimycoplasma Properties,” Nanoscale, 5(3), 1137., 2013.
[11] Huang, C., Su, Y., Wen, T., Guo, T., & Tu, M. “Single-Layered Hybrid DBPPV-CdSe–ZnS Quantum-Dot Light-Emitting Diodes,” IEEE Photonics Technology Letters, 20(4), 282-284, 2008.
[12] Shen, C., Li, K., Hou, Q., Feng, H., & Dong, X. “White LED Based on YAG: Ce, Gd Phosphor and CdSe– ZnS Core/Shell Quantum Dots,” IEEE Photonics Technology Letters , 22(12), 884-886, 2010.
[13] Chen, M., Yang, J., & Shiojiri, M., “ZnO-Based Ultra-Violet Light Emitting Diodes and Nanostructures Fabricated by Atomic Layer deposition,” Semiconductor Science and Technology, 27(7), 074005, 2012.
[14] Deng, L., Han, L., Xi, Y., Li, X., & Huang, W., “Design Optimization for High-Performance Self-Assembled Quantum Dot Lasers With Fabry–Perot Cavity,” IEEE Photonics Journal, 4(5), 1600-1609, 2012.
[15] Yan, J. H., Wang, C. G., Zhang, H., & Cheng, C, “Evaluation of Emission Cross Section of CdSe Quantum Dots for Laser Applications,” Laser Physics Letters, 9(7), 529-531, 2012.
[16] Peng, X., Wickham, J., & Alivisatos, A. P.,” Kinetics of II-VI and III-V Colloidal Semiconductor Nanocrystal Growth: Focusing of Size Distributions,” Journal of the American Chemical Society, 120(21), 5343-5344, 1998.
[17] Mi, W., Tian, J., Jia, J., Tian, W., Dai, J., and Wang, X., “Characterization of Nucleation and Growth Kinetics of the Formation of Water-Soluble CdSe Quantum Dots by Their Optical Properties,” Journal of Physics D: Applied Physics, 45(43), 435303, 2012.
[18] Peter, A. J., & Lee, C. W. (2012). Electronic and Optical Properties of CdS/CdZnS Nanocrystals. Chinese Physics B,21(8), 087302.
[19] Buckley, S., Rivoire, K., & Vučković, J.,” Engineered Quantum Dot Single-Photon Sources,” Reports on Progress in Physics, 75(12), 126503, 2012.
[20] Shu, L., Wu, H., Wan, Z., Cai, C., Xu, T., Lou, T., et al., “Physical Approaches to Tuning the Luminescence Color Patterns of Colloidal Quantum Dots,” New Journal of Physics, 14(1), 013059, 2012.
[21] Zhu, C., Wang, P., Wang, X., & Li, Y. , “Facile Phosphine-Free Synthesis of CdSe/ZnS Core/Shell Nanocrystals Without Precursor Injection,” Nanoscale Research Letters, 3(6), 213-220, 2008.
[22] Murray, C. B., Norris, D. J., & Bawendi, M. G., “Synthesis and Characterization of Nearly Monodisperse CdE (E = Sulfur, Selenium, Tellurium) Semiconductor Nanocrystallites,” Journal of the American Chemical Society, 115(19), 8706-8715, 1993.
[23] Tian, C., Wang, E., Kang, Z., Mao, B., Zhang, C., Lan, Y., et al., “Synthesis of Ag-Coated Polystyrene Colloids by an Improved Surface Seeding and Shell Growth Technique,” Journal of Solid State Chemistry, 179(11), 3270-3276, 2006.
[24] Talapin, D. V., Rogach, A. L., Kornowski, A., Haase, M., & Weller, H., “Highly Luminescent Monodisperse CdSe and CdSe/ZnS Nanocrystals Synthesized in a Hexadecylamine−Trioctylphosphine Oxide−Trioctylphospine Mixture,” Nano Letters, 1(4), 207-211, 2001.
[25] Bhattacharjee, B., Hsu, C., Lu, C., & Chang, W. H. ,“Colloidal CdSe–ZnS Core-Shell Nanoparticles: Dependence of Physical Properties on Initial Cd to Se Concentration,” Physica E: Low-dimensional Systems and Nanostructures, 33(2), 388-393, 2006.
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