Absorption properties and Quantum Confinement of colloidal CdSe quantum dots

Thu Do Thi Anh, Hong Phan Ngoc, Manh Le Duy, Thi Le Anh, Tan Man Minh

Abstract


We investigate the structural and optical properties of CdSe QDs synthesized by the hot-injection technique. High-resolution transmission electron microscopy (HRTEM) analysis reveal the size-dependent of the CdSe QDs. The first through fourth excited states determined from absorption measurements are compared with calculated quantum size levels in s- and p-symmetry. In particular, featureless absorption peaks of the second and third excited states from the first exciton appear in the differential absorption (DA) spectra. These measurements with quantitative analysis enable the estimate error to be derived from anisotropic properties caused by the crystal field.

Keywords


Quantum dots; CdSe; optical properties; Diffraction spectra; Energy spacing

Full Text:

PDF

References


Y. Shirasaki, G.J. Supran, M.G. Bawendi, V. Bulovic, Nat. Photonics. 7 (2013) 13-23. https://doi.org/10.1038/nphoton.2012.328

X. Michalet, F.F. Pinaud, L.A. Bentolila, J.M. Tsay, S. Doose, J.J. Li, G. Sundaresan, A.M. Wu, S.S. Gambhir, S. Weiss, Science, 307 (2005) 538-544. https://doi.org/10.1126/science.1104274

P. Zrazhevskiy, M. Sena, X.H. Gao, Chem. Soc. Rev. 39 (2010) 4326-4354. https://doi.org/10.1039/B915139G

A.J. Nozik, Physica E. 14 (2002) 115-120. https://doi.org/10.1016/S1386-9477(02)00374-0

B.S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, S.C-Sullivan, P.T. Kazlas, Nat. Photonics. 7 (2013) 407-412. https://doi.org/10.1038/nphoton.2013.70

I. Mekis, D.V. Talapin, A. Kornowski, M. Haase, H. Weller, J. Phys. Chem. B. 107 (2003) 7454-7462. https://doi.org/10.1021/jp0278364

A.D. Saran, J.R. Bellare, Colloids Surf. A Physicochem. Eng. Asp. 369 (2010) 165-175. https://doi.org/ 10.1016/j.colsurfa.2010.08.020

D.V. Talapin, A.L. Rogach, A. Kornowski, M. Haase, H. Weller, Nano Lett. 1 (2001) 207-211. https://doi.org/10.1021/nl0155126

D. Montiel, H. Yang, J. Phys. Chem. A. 112 (2008) 9352-9355. https://doi.org/10.1021/jp802317a

C.B. Murray, C.R. Kagan, M.G. Bawendi, Annu. Rev. Mater. Sci. 30 (2000) 545-610. https://doi.org/10.1146/annurev.matsci.30.1.545

Z. Yu, J. Li, D.B. O’Connor, L.W. Wang, P.F. Barbara, J. Phys. Chem. B. 107 (2003) 5670-5674. https://doi.org/10.1021/jp027392b

L. Brus, IEEE J. Quantum Electron. 22 (1986) 1909-1914. https://doi.org/10.1109/JQE.1986.1073184

G. Schlegel, J. Bohnenberger, I. Potapova, A. Mews, Phys. Rev. Lett. 88 (2002) 137401. https://doi.org/10.1103/PhysRevLett.88.137401

A.L. Efros, M. Rosen, Phys. Rev. B. 58 (1998) 7120-7135. https://doi.org/10.1103/PhysRevB.58.7120

P.R. Wolde, D. Frenkel, Phys. Chem. Chem. Phys. 1 (1999) 2191-2196. https://doi.org/10.1039/A809346F

J. van Embden, P. Mulvaney, Langmuir, 21 (2005) 10226-10233. https://doi.org/10.1021/la051081l




DOI: https://doi.org/10.51316/jca.2021.103

Refbacks

  • There are currently no refbacks.




*******

Index: Google Scholar; Crossref

---------

Vietnam Journal of Catalysis and Adsorption

Address: Room 302  |  C4-5  |  Hanoi University of Science and Technology. 1 Dai Co Viet, Hanoi.

Tel.: ‎‎‎+84. 967.117.098 (Dr. Phượng)  |  Email: editor@jca.edu.vn  |  FB: JCA.VNACA