Observation of Bimolecular Carrier Recombination Dynamics in Close-Packed Films of Colloidal CdSe Nanocrystals

Journal of Physical Chemistry B

Volumn 107, Issue 46, 2003, Pages 12585-12588

  Jarosz, M V ^a   Stott, N E ^a   Drndic, M ^a   Morgan, N Y ^a   Kastner, M A ^a   Bawendi, M G ^a  

^a Massachusetts Institute of Technology Cambridge   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CADMIUM COMPOUNDS; CARRIER CONCENTRATION; CHARGE CARRIERS; COLLOIDS; ELECTRODES; GOLD; NANOSTRUCTURED MATERIALS; PHOTOCONDUCTIVITY; PHOTOCURRENTS; PHOTOIONIZATION; PHOTOLITHOGRAPHY; SOLVENTS; TRANSMISSION ELECTRON MICROSCOPY;

BIMOLECULAR CARRIER RECOMBINATION;

SEMICONDUCTOR QUANTUM DOTS;

EID: 0345393791     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp034849o     Document Type: Article

References (33)

1. Nirmal, M.; Dabbousi, B. O.; Bawendi, M. G.; Macklin, J. J.; Trautman, J. K.; Harris, T. D.; Brus, L. E. Nature 1996, 383, 802.
2. Woo, W. K.; Shimizu, K. T.; Jarosz, M. V.; Neuhauser, R. G.; Leatherdale, C. A.; Rubner, M. A.; Bawendi, M. G. Adv. Mater. 2002, 14, 1068.
3. Shim, M.; Wang, C.; Guyot-Sionnest, P. J. Phys. Chem. B 2001, 105, 2369.
4. Blackburn, J. L.; Ellingson, R. J.; Micic, O. I.; Nozik, A. J. J. Phys. Chem. B 2003, 107, 102.
5. Drndic, M.; Jarosz, M. V.; Morgan, N. Y.; Kastner, M. A.; Bawendi, M. G. Submitted to J. Appl. Phys.
6. Ellingson, R. J.; Blackburn, J. L.; Yu, P. R.; Rumbles, G.; Micic, O. I. ; Nozik, A. J. J. Phys. Chem. B 2002, 106, 7758.
7. Ginger, D. S.; Greenham, N. C. Phys. Rev. B 1999, 59, 10622.
8. Ginger, D. S.; Greenham, N. C. J. Appl. Phys. 2000, 87, 1361.
9. Ginger, D. S.; Greenham, N. C. Synth. Met. 2001, 124, 117.
10. Leatherdale, C. A.; Kagan, C. R.; Morgan, N. Y.; Empedocles, S. A.; Kastner, M. A.; Bawendi, M. G. Phys. Rev. B 2000, 62, 2669.
11. Krauss, T. D.; Brus, L. E. Phys. Rev. Lett. 1999, 83, 4840.
12. Shim, M.; Guyot-Sionnest, P. Nature 2000, 407, 981.
13. Wang, C. J.; Shim, M.; Guyot-Sionnest, P. Science 2001, 291, 2390.
14. Wang, C. J.; Shim, M.; Guyot-Sionnest, P. Appl. Phys. Lett. 2002, 80, 4.
15. Colvin, V. L.; Schlamp, M. C.; Alivisatos, A. P. Nature 1994, 370, 354.
16. Dabbousi, B. O.; Bawendi, M. G.; Onitsuka, O.; Rubner, M. F. Appl. Phys. Lett. 1995, 66, 1316.
17. Coe, S.; Woo, W. K.; Bawendi, M. G.; Bulovic, V. Nature 2002, 420, 800.
18. Huynh, W. U.; Dittmer, J. J.; Alivisatos, A. P. Science 2002, 295, 2425.
19. Huynh, W. U.; Dittmer, J. J.; Teclemariam, N.; Milliron, D. J.; Alivisatos, A. P.; Barnham, K. W. J. Phys. Rev. B 2003, 67, art. no.
20. Nozik, A. J. Physica E 2002, 14, 115.
21. Bawendi, M. G.; Stott, N. E. U.S. Patent 6,576,291, 2003.
22. Murray, C. B.; Norris, D. J.; Bawendi, M. G. J. Am. Chem. Soc. 1993, 115, 8706.
23. Murray, C. B.; Kagan, C. R.; Bawendi, M. G. Science 1995, 270, 1335.
24. Murray, C. B.; Kagan, C. R.; Bawendi, M. G. Annu. Rev. Mater. Sci. 2000, 30, 545.
25. Kagan, C. R.; Murray, C. B.; Nirmal, M.; Bawendi, M. G. Phys. Rev. Lett. 1996, 76, 1517.
26. Kagan, C. R.; Murray, C. B.; Bawendi, M. G. Phys. Rev. B 1996, 54, 8633.
27. These measurements require very rigorous sample preparation to ensure high-quality films. Even with a final filtration step prior to film deposition, filtering once during the size selection causes the photocurrent to go from unmeasurable to measurable. Purifying the TOP adds an additional order of magnitude to the photocurrent, although still produces films that do not look smooth when observed with an optical microscope. If, in addition to these purification steps, the growth solution is put in the refrigerator for 1 h prior to centrifugation and a filtration step is added prior to the second precipitation step as well as the third, one additional order of magnitude is added to the photocurrent, and the films appear smooth when observed with an optical microscope. Optical microscope images of films prepared with different levels of rigor are shown in the Supporting Information, Figure IS.
28. Bube, R. H. Photoconductivity of Solids; Wiley: New York, 1960.
29. McNeill, J. D.; Barbara, P. F. J. Phys. Chem. B 2002, 106, 4632.
30. Katari, J. E. B.; Colvin, V. L.; Alivisatos, A. P. J. Phys. Chem. 1994, 98, 4109.
31. Bagnall, K. W. The Chemistry of Selenium, Tellurium and Polonium; Elsevier Publishing Co.: Amsterdam, 1966.
32. Bube, R. H. J. Chem. Phys. 1957, 27, 496.
33. Bube, R. H. J. Electrochem. Soc. 1966, 113, 793.