Recombination dynamics of CdTe/CdS core-shell nanocrystals

Journal of Physical Chemistry B

Volumn 110, Issue 5, 2006, Pages 2074-2079

  Schops O ^a   Le Thomas, N ^a   Woggon, U ^a   Artemyev, M V ^b  

^a TU DORTMUND UNIVERSITY   (Germany)

^b BELARUSIAN STATE UNIVERSITY   (Belarus)

Author keywords

[No Author keywords available]

Indexed keywords

CADMIUM COMPOUNDS; EXCITONS; MOLECULAR DYNAMICS; PHONONS; THERMAL EFFECTS;

EXCITON STATES; NANOCRYSTALS; RECOMBINATION DYNAMICS;

NANOSTRUCTURED MATERIALS;

EID: 33644784094     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0557013     Document Type: Article

References (53)

1. Nirmal, M.; Norris, D. J.; Kuno, M.; Bawendi, M. G.; Efros, Al. L.; Rosen, M. Phys. Rev. Lett. 1995, 75, 3728.
2. Efros, Al. L.; Rosen, M.; Kuno, M.; Nirmal, M.; Norris, D. G.; Bawendi, M. G. Phys. Rev. B 1996, 54, 4843.
3. Franceschetti, A.; Fu, H.; Wang, L. W.; Zunger, A. Phys. Rev. B 1999, 60, 1819.
4. Rajh, T.; Micic, O.I.; Nozik, A. J. J. Phys. Chem. 1993, 97, 11999.
5. Murray, C. B.; Norris, D. J.; Bawendi, M. G. J. Am. Chem. Soc. 1993, 115, 8706.
6. Rogach, A. L.; Katsikas, L.; Kornowski, A.; Dangsheng, Su; Eychmüller, A.; Weller, H. Ber. Bunsen-Ges. Phys. Chem. 1996, 100, 1772.
7. Masumoto, Y.; Sonobe, K. Phys. Rev. B 1997, 56, 9734.
8. Talapin, D. V.; Haubold, S.; Rogach, A. L.; Kornowski, A.; Haase, M.; Weller, H. J. Phys. Chem. B 2001, 105, 2260.
9. Yu, W. W., Wang, Y. A.; Peng, X. Chem. Mater. 2003, 15, 4300.
10. Kapitonov, A. M.; Stupak, A. P.; Gaponenko, S. V.; Petrov, E. P.; Rogach, A. L.; Eychmüller, A. A. J. Phys. Chem. B 1999, 103, 10109.
11. Wuister, S. F.; van Driel, F.; Meijerink, A. J. Lumin. 2003, 102/ 103, 327.
12. Wuister, S. F.; Koole, R.; de Mello Donega, C.; Meijerink, A. J. Phys. Chem. B 2005, 109, 5504.
13. Franzl, T.; Koktysh, D. S.; Klar, T. A.; Rogach, A. L.; Feldmann, J.; Gaponik, N. Appl. Phys. Lett. 2004, 84, 2904.
14. Schreder, B.; Schmidt, T.; Ptatschek, V.; Winkler, U.; Materny, A.; Umbach, E.; Lerch, M.; Müller, G.; Kiefer, W.; Spanhel, L. J. Phys. Chem. B 2000, 104, 1677.
15. Mastai, Y.; Hodes, G. J. Phys. Chem. B 1997, 101, 2685.
16. Gao, M.; Kirstein, S.; Möhwald, H.; Rogach, A. L.; Kornowski, A.; Eychmüller, A.; Weller, H. J. Phys. Chem. B 1998, 102, 8360.
17. Gaponik, N.; Talapin, D. V.; Rogach, A. L.; Hoppe, K.; Shevchenko, E. V.; Kornowski, A.; Eychmüller, A.; Weller, H. J. Phys. Chem. B 2002, 106, 7177.
18. Bordiert, H.; Talapin, D. V.; Gaponik, N.; McGinley, C.; Adam, S.; Möller, T.; Weller, H. J. Phys. Chem. B 2003, 107, 9662.
19. Gindele, F.; Westphäling, R.; Woggon, U.; Spanhel, L.; Ptatscheck, V. Appl. Phys. Lett. 1997, 71, 2181.
20. Artemyev, M. V.; Bibik, A. I.; Gurinovich, L. I.; Gaponenko, S. V.; Woggon, U. Phys. Rev. B 1999, 60, 1504.
21. Artemyev, M. V.; Woggon, U.; Jaschinski, H.; Gurinovich, L. I.; Gaponenko, S. V. J. Phys. Chem. B 2000, 104, 11617.
22. The decay dynamics will be presented here for one selected energy at the low-energy tail of the spectrum. We also checked the behaviour for a few other energies nearby and did not find a qualitatively different behaviour when going to even larger sizes, i.e., longer wavelengths. For very large nanocrystal sizes, the effect of exchange interaction becomes negligible and we did not gain additional insights into the problem under study here. The data for smaller CdTe nanocrystals did not much differ from the published data and were therefore not included in this study here.
23. Schlegel, G.; Bohnenberger, J.; Potapova, I.; Mews, A. Phys. Rev. Lett. 2002, 88, 137401.
24. de Mello Donega, C.; Hickey, S. G.; Wuister, S. F.; Vanmaekelbergh, D.; Meijerink, A. J. Phys. Chem B 2003, 107, 489.
25. Fisher, B. R.; Eisler, H. J.; Stott, N. E.; Bawendi, M. G. J. Phys. Chem. B 2004, 108, 143.
26. Excitons in disordered systems, such as porous silicon, can migrate inside a potential landscape of local potentials. In such systems, stretched exponential decay behaviours can be observed, however, the microscopic origin of the stretched exponential fitting function is there a broad distribution in decay times due the dispersive motion of exciton. This model cannot be applied here since the nanocrystals are isolated and cannot interact with each other.
27. Lindsey, C. P.; Patterson, G. D. J. Chem. Phys. 1980, 73, 3348.
28. van Driel, A. F.; Allan, G.; Delerue, C.; Lodahl.P.; Vos, W. L.; Vanmaekelbergh, D., Phys. Rev. Lett. 2005, 95, 236804.
29. Wang, W.; Yu, W.; Zhang, Y.; Aldana, J.; Peng, X.; Xiao, M. Phys. Rev. B 2003, 68, 125318.
30. Rakovich, Y. P.; Filonovich, S. A.; Gomes, M. J. M., Donegan, J. F.; Talapin, D. V.; Rogach, A. L.; Eychmüller, A. Phys. Status Solidi B 2002, 229, 449.
31. Camasset, J.; Auvergne, D.; Mathieu, H.; Triboulet, R.; Varfainy, M. Solid State Commun. 1973, 13, 63.
32. Esch, V.; Fluegel, B.; Khitrova, G.; Gibbs, H. M.; Xu Juajin; Kang, K.; Koch, S. W.; Liu, L. C.; Risbud, S. B.; Peyghambarian, N. Phys. Rev. B 1990, 42, 7450.
33. de Oliveira, C. R. M.; de Paula, A. M.; Filho, F. O.; Neto, J. A. M.; Barbosa, L. C.; Alves, O. L.; Menezes, E. A.; Rios, J. M. M.; Fragnito, H. L.; Cruz, C. H. B.; Cesar, C. L. Appl. Phys. Lett. 1995, 66, 439.
34. Redigolo, M. L.; Arellano, W. A.; Barbosa, L. C.; Brito Cruz, C. H.; Cesar, C. L.; de Paula, A. M. Semicond. Sci. Technol. 1999, 14, 58.
35. Richard, T.; Lefebvre, P.; Mathieu, H.; Allegre, J. Phys. Rev. B 1996, 53, 7287.
36. Lefebvre, P.; Richard, T.; Mathieu, H.; Allegre, J. Solid State Commun. 1996, 98, 303.
37. Perez-Conde, J.; Bhattacharjee, A. K.; Chamarro, M.; Lavallard, P.; Petrikov, V. D.; Lipovskii, A. A. Phys. Rev. B 2001, 64, 113303.
38. Perez-Conde, J.; Bhattacharjee, A. K. Solid State Commun. 1999, 110, 259.
39. Wardzynski, W.; Suffczynski, M. Solid State Commun. 1972, 10, 417.
40. Bawendi, M. G.; et al. J. Chem. Phys. 1992, 96, 946;
41. Nirmal, M.; et al. Phys. Rev. Lett. 1995, 75, 3728;
42. Fan, X.; et al. Phys. Rev. B 2001, 64, 115310;
43. Labeau, O.; et al. Phys. Rev. Lett. 2003, 90, 257404;
44. Crooker, S. A.; et al. Appl. Phys. Lett. 2003, 82, 2793.
45. Harrison, M. T.; Kershaw, S. V.; Burt, M. G.; Eychmüller, A.; Weller, H.; Rogach, A. L. Mater. Sci. Eng. B 2000, 69, 355.
46. Kershaw, S. V.; Burt, M.; Harrison, M.; Rogach, A. L.; Weller, H.; Eychmüller, A. Appl. Phys. Lett. 1999, 75, 1694.
47. Kim, S.; Fisher, B.; Eisler, H. J.; Bawendi, M. G. J. Am. Chem. Soc. 2003, 125, 11466.
48. Rockenberger, J.; Tröger, L.; Rogach, A. L.; Tischer, M.; Grundmann, M.; Eychmüller, A.; Weller, H. J. Chem. Phys. 1998, 108, 7807.
49. Ablyazov, N. N.; Areshkin, A. G.; Melekhin, V. G.; Suslina, L. G.; Fedorov, D. L. Phys. Status Solidi B 1986, 135, 217.
50. Niles, D. W.; Höchst, H. Phys. Rev. B 1990, 41, 12710.
51. Su-Huai Wei, Zhang, S. B. Phys. Rev. B 2000, 62, 6944.
52. Su-Huai Wei, Zhang, S. B.; Zunger, A. J. Appl. Phys. 2000, 87, 1304.
53. The observed temperature-dependent change in decay times from 13 to 2.25 ns cannot be explained by a thermally activated change in electron localization from shell to core states. The thermal activation energy necessary for such a direct-indirect exciton transformation is much higher than the provided thermal energy and the observed change in decay times does not correspond to the decay time difference expected for a transformation from an indirect-type core-shell exciton towards a direct-type core exciton state.