Abstract
CdTe quantum dots (QDs) are synthesized at room temperature in aqueous solvents of different dielectric constants and characterized using optical spectroscopy. Absorption spectra of the QDs obtained is used to calculate the size dependent dielectric function of the QDs using Kramers–Kronig relation and iterative matrix inversion method. Effect of solvent dielectric constant on optical properties of QDs is studied theoretically using Maxwell–Garnett effective medium theory. Direct correlation between absorption intensity and solvent dielectric constant is explained on the basis of decreasing local field factor of the solvents. Emission rates of QDs is also found to have dependence on the dielectric constant of the solvent. Spontaneous emission rates of QDs in Ionic liquid environment is studied theoretically using Maxwell–Garnett effective medium theory. Our results show that variation in dielectric constant of Ionic liquids have a significant impact on spontaneous emission properties of the QDs.
Similar content being viewed by others
References
Y. Zhang, L. Mi, J.Y. Chen, P.N. Wang, Biomed. Mater. 4, 12001 (2009)
A. Thränhardt, C. Ell, G. Khitrova, H. Gibbs, Phys. Rev. B 65, 1 (2002)
A.C. Bartnik, The Dependence of Lead-Salt Nanocrystal Properties on Morphology and Dielectric Environment (Cornell University, New York, 2011)
C.A. Leatherdale, W.K. Woo, F.V. Mikulec, M.G. Bawendi, J. Phys. Chem. B 106, 7619 (2002)
G. Mie, Ann. Phys. 330, 377 (1908)
A.L. Aden, M. Kerker, J. Appl. Phys. 22, 1242 (1951)
S.F. Wuister, C.D.M. Donegá, A. Meijerink, J. Chem. Phys. 121, 4310 (2004)
P. Lodahl, A.F. Van Driel, I.S. Nikolaev, A. Irman, Nature 430, 8 (2004)
M. Alves-Santos, R. Di Felice, G. Goldoni, J. Phys. Chem. C 114, 3776 (2010)
O. Levy, D. Stroud, Phys. Rev. B 56, 8035 (1997)
L. Bányai, S.W. Koch, Semiconductor Quantum Dots (World Scientific, Singapore, 1993)
J.S. Kamal, A. Omari, K. Van Hoecke, Q. Zhao, A. Vantomme, F. Vanhaecke, R.K. Capek, Z. Hens, J. Phys. Chem. C 116, 5049 (2012)
A. Kigel, M. Brumer, G.I. Maikov, A. Sashchiuk, E. Lifshitz, Small 5, 1675 (2009)
I. Moreels, G. Allan, B. De Geyter, L. Wirtz, C. Delerue, Z. Hens, Phys. Rev. B 81, 1 (2010)
M.H. Patel, T.K. Chaudhuri, T. Shripathi, U. Deshpande, V.K. Patel, J. Mater. Sci. Mater. Electron. (2016). doi:10.1007/s10854-016-5395-3
R. Prasanth, J.E.M. Haverkort, A. Deepthy, E.W. Bogaart, J.J.G.M. Van Der Tol, E.A. Patent, G. Zhao, Q. Gong, P.J. Van Veldhoven, R. Nötzel, J.H. Wolter, Appl. Phys. Lett. 84, 4059 (2004)
R. Prasanth, J. Appl. Phys. 99, 54501 (2006)
B. Liu, Y. Xue, J. Zhang, D. Wang, T. Xie, X. Suo, L. Mu, H. Shi, J. Mater. Sci.: Mater. Electron. 192, 370 (2016)
P. Sheng, W. Li, J. Cai, X. Wang, X. Tong, Q. Cai, C.A. Grimes, J. Mater. Chem. A 1, 7806 (2013)
M. Huang, Y. Jiang, P. Sasisanker, G.W. Driver, H. Weing, J. Chem. Eng. Data 56, 1494 (2011)
C. Wang, M. Fang, J. Han, H. Zhang, Y. Cui, B. Yang, J. Phys. Chem. C 113, 19445 (2009)
B.-R. Hyun, A.C. Bartnik, J.-K. Lee, H. Imoto, L. Sun, J.J. Choi, Y. Chujo, T. Hanrath, C.K. Ober, F.W. Wise, Nano Lett. 10, 318 (2010)
Y. Jiang, S. Xu, Z. Zhao, L. Zheng, Z. Wang, C. Wang, Y. Cui, RSC Adv. 5, 18379 (2015)
B. Omogo, J.F. Aldana, C.D. Heyes, J. Phys. Chem. C. Nanomater. Interfaces 117, 2317 (2013)
M.-Q. Dai, W. Zheng, Z. Huang, L.-Y. Lanry, Yung. J. Mater. Chem. 22, 16336 (2012)
Z. Hens, I. Moreels, J. Mater. Chem. 22, 10406 (2012)
Y.J. Chen, X.P. Yan, Small 5, 2012 (2009)
Y. Rakovich, J. Donegan, Cadmium Telluride Quantum Dots: Advances and Applications (Pan Stanford Publishing, 2013)
M.C. Sekhar, K. Santhosh, J.P. Kumar, N. Mondal, S. Soumya, A. Samanta, J. Phys. Chem. C 118, 18481 (2014)
Acknowledgments
The authors would like to acknowledge UGC-MRP-MAJOR-MATE-2013-22019 and the Ministry of New and Renewable Energy—National Renewable Energy Fellowship for the financial support. The author thanks Centre for Nanoscience and Technology and Central Instrumentation facility, Pondicherry University, STIC, India, Cochin University of Science of Technology and National Centre for Nanosciences and Nanotechnology, University of Madras for characterization facilities.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sundheep, R., Prasanth, R. The effect of solvent dependent local field factor in the optical properties of CdTe quantum dots. J Mater Sci: Mater Electron 28, 3168–3174 (2017). https://doi.org/10.1007/s10854-016-5905-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10854-016-5905-3