Seven excitons at a cost of one: Redefining the limits for conversion efficiency of photons into charge carriers

Nano Letters

Volumn 6, Issue 3, 2006, Pages 424-429

  Schaller, Richard D ^a   Sykora, Milan ^a   Pietryga, Jeffrey M ^a   Klimov, Victor I ^a  

^a LOS ALAMOS NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CONVERSION EFFICIENCY; PHOTON ENERGY; SEMICONDUCTOR NANOCRYSTALS;

CHARGE CARRIERS; ENERGY DISSIPATION; ENERGY GAP; NANOSTRUCTURED MATERIALS; PHOTONS; PHOTOVOLTAIC CELLS;

EXCITONS;

EID: 33645389931     PISSN: 15306984     EISSN: None     Source Type: Journal    
DOI: 10.1021/nl052276g     Document Type: Article

References (26)

1. Shockley, W.; Queisser, H. J. J. Appl. Phys. 1961, 32, 510.
2. The value of 44% does not account for losses associated with, e.g., electron-hole recombination and extraction of charges from a solar cell. The maximal conversion efficiency is ∼31% in the "detailed balance limit" discussed in ref 1.
3. Landsberg, P. Recombination in semiconductors; Cambridge University Press: Cambridge, 1991.
4. Kolodinski, S.; Werner, J. H.; Wittchen, T.; Queisser, H. J. Appl. Phys. Lett. 1993, 63, 2405.
5. Green, M. A. Physica E 2002, 14, 65.
6. Nozik, A. J. Physica E 2002, 14, 115.
7. Brendel, R.; Werner, J. H.; Queisser, H. J. Sol. Energy Mater. Sol. Cells 1996, 41/42, 419.
8. Koc, S. Czech J. Phys. B 1957, 7, 91.
9. Wolf, M.; Brendel, R.; Werner, J. H.; Queisser, H. J. J. Appl. Phys. 1998, 83, 4213.
10. Schaller, R. D.; Klimov, V. I. Phys. Rev. Lett. 2004, 92, 186601.
11. Ellingson, R.; Beard, M. C.; Johnson, J. C.; Yu, P.; Micic, O. I.; Nozik, A. J.; Shabaev, A.; Efros, A. L. Nano Lett. 2005, 5, 865.
12. Murray, C. B.; Sun, S. H.; Gaschler, W.; Doyle, H.; Betley, T. A.; Kagan, C. R. IBM J. Res. Dev. 2001, 45, 47.
13. Wehrenberg, B. L.; Wang, C. J.; Guyot-Sionnest, P. J. Phys. Chem. B 2002, 106, 10634.
14. Pietryga, J. M.; Schaller, R. D.; Werder, D.; Stewart, M. H.; Klimov, V. I.; Hollingsworth, J. A. J. Am. Chem. Soc. 2004, 126, 11752.
15. 0〉 < 0.1, the probability of generating multiexcitons via sequential absorption of multiple photons is less than 0.5% as estimated from the Poisson distribution of NC populations.
16. Klimov, V. I.; Mikhailovsky, A. A.; McBranch, D. W.; Leatherdale, C. A.; Bawendi, M. G. Science 2000, 287, 1011.
17. g because of Coulomb carrier-carrier interactions; this difference results in a smaller effective energy gap that should be used in the plot of "ideal" QE vs photon energy.
18. Schaller, R. D.; Petruska, M. A.; Klimov, V. I. J. Phys. Chem. B 2003, 107, 13765.
19. Califano, M.; Zunger, A.; Franceschetti, A. Appl. Phys. Lett. 2004, 84, 2409.
20. Htoon, H.; Cox, P. J.; Klimov, V. I. Phys. Rev. Lett. 2003, 93, 187402/1.
21. Schaller, R. D.; Agranovich, V. M.; Klimov, V. I. Nat. Phys. 2005, 1, 189.
22. This statement is only valid if there are no kinetic or mechanistic complications due to multiple charges being located on a single NC.
23. In effective "biexcitonic" units, NCs containing single excitons have a value of zero, while those containing biexcitons, triexcitons, quadraexcitons, etc. have values of 1, 1.5, 2, etc.
24. Logunov, S.; Green, T.; Marguet, S.; El-Sayed, M. A. J. Phys. Chem. A 1998, 102, 5652.
25. Blackburn, J. L.; Selmarten, D. C.; Nozik, A. J. J. Phys. Chem. B 2003, 107, 14154.
26. Asbury, J. B.; Hao, E.; Wang, Y.; Ghosh, H. N.; Lian, T. J. Phys. Chem. B 2001, 105, 4545.