Relationship between Microstructure and Photoelectron Behaviors of CdTe/Ligand Self-Assembly Quantum Dots

Abstract:

A water-soluble CdTe QDs capped by 3-Mercaptopropionic acid (MPA) were synthesized. The results confirmed that the grain size of the QDs was controlled by changing the reflux time of precursor solution and that the QDs possessed obviously quantum size effect. The results showed that a depletion layer CdTe_1-xS_x (0£x≤1) formed in between CdTe nanoparticle and ligand MPA. It is believed that two heterojunction-like structures possess quite distinct surface photovoltaic characteristic excited between the core-CdTe and the shell-CdS, and between CdTe/CdS and the ligand MPA, respectively, according to the EFISPS results of the MPA-capped CdTe QDs.

• Periodical: Materials Science Forum (Volume 685)
• Pages: 114-118
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.685.114
• Online since: June 2011
• Authors: Wei Yong Yang, Kui Ying Li, Sai Ling Wei, Guang Jing Song, Jan Zhang
• Keywords: CdTe, Microstructure, Photoelectron Behaviours, SPV Spectroscopy

References

[1] M. Han, X. Gao, J. Z. Su, S. Nie, Nature Biotechnol. 19 (2001) 631.

[2] S. Srauf, K. Hennessy, M.T. Rakher, Y. -S. Choi, A. Badolato, L.C. Andreani, E.L. Hu, P.M. Petroff, D. Bouwmeester, Phys. Rev. Lett. 96 (2006) 127404.

DOI: 10.1103/physrevlett.96.127404

[3] M. K. So, C. J. Xu, M. Loening, S. S. Gambhir, J. Rao, Nat. Biotechnol, 24 (2006) 339.

[4] X. Michalet, F. F. Pinaud, L. A. Bentolila, J. M. Tsay, S. Doose, J. J. Li, Science 307 (2005) 538.

[5] J. M. Klostranec, W. C. W. Chan, Adv. Mater. 18 (2006) (1953).

[6] N. Gaponik, D.V. Talapin, A.L. Rogach, K. Hoppe, E.V. Shevchenko, A. Kornowski, A. Eychmueller, H. Weller, J. Phys. Chem. B 106(2002) 7177.

DOI: 10.1021/jp025541k

[7] W.C.W. Chan, S.M. Nie, Science 281 (1998) (2016).

[8] M.J. Bruchez, M. Moronne, P. Gin, S. Weiss, A. P. Alivisatos, Science 281 (1998) (2013).

[9] J. Rockenberger, L. Troger, A. L. Rogach, M. Tischer, M. Grundmann, A. Eychmuller, H. Weller, J. Chem. Phys. 108 (1998) 7807.

[10] A. M. Kapitonov, A. P. Stupak, S. V. Gaponenko, E. P. Petrov, A. L. Rogach, A. Eychmüller, J. Phys. Chem. B 103 (1999) 10109.

DOI: 10.1021/jp9921809

[11] H. Zhang, Z. Zhou, B. Yang, M.Y. Gao, J. Phys. Chem. B 107 (2003) 8.

[12] H. Peng, L. J. Zhang, C. Soeller, J. Travas-Sejdic, Journal of Luminescence, 127 (2007) 721.

[13] J. J. Peng, S. P. Liu, S. G. Yan, X. Q. Fan, Y. Q. He, Colloids and Surfaces A: Physicochem. Eng. Aspects, 359 (2010) 13.

[14] K.Y. Li, H. Zhang, W. Y. Yang, S. L. Wei, D. Y. Wang, Materials Chemistry and Physics, 123 (2010) 98.

[15] J. Fritsche, D. Kraft, A. Thißen, T. Mayer, A. Klein, Thin Solid Films 403-404 (2002) 252.

DOI: 10.1016/s0040-6090(01)01528-0

[16] L. Kronik, Y. Shapira, Surface Science Reports 37 (1999) 1±206.

[17] L. Q. Jing, X. J. Sun, J. Sun, W. M. Cai, Z. L. Xu, Y. G. Ding, Sol. Energy Mater. Sol. Cells, 79 (2003) 133.

[18] T. Rajh, O. I. Micic, A. J. Nozik, J. Phys. Chem, 97 (1993) 11999.

[19] M. Edward, J. R. Kosower, D. Souza, Chemical Physics, 324 (2006) 3.