Nature Physics, volume 5, issue 11, pages 811-814

Assessment of carrier-multiplication efficiency in bulk PbSe and PbS

J. J. H. Pijpers 1
R. Ulbricht 1
K J Tielrooij 1
A. Osherov 2
Y Golan 2
C. Delerue 3
G ALLAN 3
M. Bonn 1
1
 
FOM Institute for Atomic and Molecular Physics, 1098 SJ, Amsterdam, The Netherlands
3
 
Département ISEN, Institut d’Electronique de Microélectronique et de Nanotechnologie (UMR CNRS 8520), F-59046 Lille Cedex, France
Publication typeJournal Article
Publication date2009-09-06
Journal: Nature Physics
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor19.6
ISSN17452473, 17452481
General Physics and Astronomy
Abstract
More efficient solar-energy conversion is possible if a single high-energy photon can be made to generate two electron–hole pairs in a cell, rather than a single pair plus heat. It is now shown that, contrary to expectation, this carrier multiplication is better in bulk semiconductor materials than in quantum dots. One of the important factors limiting solar-cell efficiency is that incident photons generate one electron–hole pair, irrespective of the photon energy. Any excess photon energy is lost as heat. The possible generation of multiple charge carriers per photon (carrier multiplication) is therefore of great interest for future solar cells1. Carrier multiplication is known to occur in bulk semiconductors, but has been thought to be enhanced significantly in nanocrystalline materials such as quantum dots, owing to their discrete energy levels and enhanced Coulomb interactions1,2,3. Contrary to this expectation, we demonstrate here that, for a given photon energy, carrier multiplication occurs more efficiently in bulk PbS and PbSe than in quantum dots of the same materials. Measured carrier-multiplication efficiencies in bulk materials are reproduced quantitatively using tight-binding calculations, which indicate that the reduced carrier-multiplication efficiency in quantum dots can be ascribed to the reduced density of states in these structures.

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GOST Copy
Pijpers J. J. H. et al. Assessment of carrier-multiplication efficiency in bulk PbSe and PbS // Nature Physics. 2009. Vol. 5. No. 11. pp. 811-814.
GOST all authors (up to 50) Copy
Pijpers J. J. H., Ulbricht R., Tielrooij K. J., Osherov A., Golan Y., Delerue C., ALLAN G., Bonn M. Assessment of carrier-multiplication efficiency in bulk PbSe and PbS // Nature Physics. 2009. Vol. 5. No. 11. pp. 811-814.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1038/nphys1393
UR - https://doi.org/10.1038/nphys1393
TI - Assessment of carrier-multiplication efficiency in bulk PbSe and PbS
T2 - Nature Physics
AU - Pijpers, J. J. H.
AU - Ulbricht, R.
AU - Tielrooij, K J
AU - Osherov, A.
AU - Golan, Y
AU - Delerue, C.
AU - ALLAN, G
AU - Bonn, M.
PY - 2009
DA - 2009/09/06 00:00:00
PB - Springer Nature
SP - 811-814
IS - 11
VL - 5
SN - 1745-2473
SN - 1745-2481
ER -
BibTex |
Cite this
BibTex Copy
@article{2009_Pijpers,
author = {J. J. H. Pijpers and R. Ulbricht and K J Tielrooij and A. Osherov and Y Golan and C. Delerue and G ALLAN and M. Bonn},
title = {Assessment of carrier-multiplication efficiency in bulk PbSe and PbS},
journal = {Nature Physics},
year = {2009},
volume = {5},
publisher = {Springer Nature},
month = {sep},
url = {https://doi.org/10.1038/nphys1393},
number = {11},
pages = {811--814},
doi = {10.1038/nphys1393}
}
MLA
Cite this
MLA Copy
Pijpers, J. J. H., et al. “Assessment of carrier-multiplication efficiency in bulk PbSe and PbS.” Nature Physics, vol. 5, no. 11, Sep. 2009, pp. 811-814. https://doi.org/10.1038/nphys1393.
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