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Physical Review Letters, volume 92, issue 18, publication number 186601

High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.

Publication typeJournal Article
Publication date2004-05-05
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor8.6
ISSN00319007, 10797114
General Physics and Astronomy
Abstract
We demonstrate for the first time that impact ionization (II) (the inverse of Auger recombination) occurs with very high efficiency in semiconductor nanocrystals (NCs). Interband optical excitation of PbSe NCs at low pump intensities, for which less than one exciton is initially generated per NC on average, results in the formation of two or more excitons (carrier multiplication) when pump photon energies are more than 3 times the NC band gap energy. The generation of multiexcitons from a single photon absorption event is observed to take place on an ultrafast (picosecond) time scale and occurs with up to 100% efficiency depending upon the excess energy of the absorbed photon. Efficient II in NCs can be used to considerably increase the power conversion efficiency of NC-based solar cells.

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Schaller R. D., KLIMOV V. I., Klimov V. I. High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion. // Physical Review Letters. 2004. Vol. 92. No. 18. 186601
GOST all authors (up to 50) Copy
Schaller R. D., KLIMOV V. I., Klimov V. I. High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion. // Physical Review Letters. 2004. Vol. 92. No. 18. 186601
RIS |
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevLett.92.186601
UR - https://doi.org/10.1103/PhysRevLett.92.186601
TI - High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.
T2 - Physical Review Letters
AU - Schaller, R. D.
AU - KLIMOV, V. I.
AU - Klimov, Victor I.
PY - 2004
DA - 2004/05/05 00:00:00
PB - American Physical Society (APS)
IS - 18
VL - 92
SN - 0031-9007
SN - 1079-7114
ER -
BibTex
Cite this
BibTex Copy
@article{2004_Schaller,
author = {R. D. Schaller and V. I. KLIMOV and Victor I. Klimov},
title = {High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.},
journal = {Physical Review Letters},
year = {2004},
volume = {92},
publisher = {American Physical Society (APS)},
month = {may},
url = {https://doi.org/10.1103/PhysRevLett.92.186601},
number = {18},
doi = {10.1103/PhysRevLett.92.186601}
}
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