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Absolute Photoluminescence Quantum Yields of IR-26 Dye, PbS, and PbSe Quantum Dots

Semonin, Octavi E., Johnson, Justin C., Luther, Joseph M., Midgett, Aaron G., Nozik, Arthur J., Beard, Matthew C.·2010·The Journal of Physical Chemistry Letters

Abstract

In this study, we have directly measured the photoluminescence quantum yield (Φ PL ) of IR-26 at a range of concentrations and the Φ PL of PbS and PbSe QDs for a range of sizes. We find that the Φ PL of IR-26 has a weak concentration dependence due to reabsorption, with a Φ PL of 0.048 ± 0.002% for low concentrations, lower than previous reports by a full order of magnitude. We also find that there is a dramatic size dependence for both PbS and PbSe QDs, with the smallest dots exhibiting a Φ PL in excess of 60%, while larger dots fall below 3%. A model, including nonradiative transition between electronic states and energy transfer to ligand vibrations, appears to explain this size dependence. These findings provide both a better characterization of photoluminescence for near-infrared emitters and some insight into how improved QDs can be developed.

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Metadata

Authors
Semonin, O. E., Johnson, J. C., Luther, J. M., Midgett, A. G., Nozik, A. J., & Beard, M. C.
Venue
The Journal of Physical Chemistry Letters
Published
2010-07-28
Volume
1
Issue
16
Pages
2445-2450
ISSN
1948-7185 (ISSN-L)
OpenAlex
W2068641096
Cited by
310
References
0
FWCI
8.34
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Absolute Photoluminescence Quantum Yields of IR-26 Dye, PbS, and PbSe Quantum Dots. https://app.cochat.ai/papers/10.1021/jz100830r
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Semonin, O. E., Johnson, J. C., Luther, J. M., Midgett, A. G., Nozik, A. J., & Beard, M. C. (2010). Absolute Photoluminescence Quantum Yields of IR-26 Dye, PbS, and PbSe Quantum Dots. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz100830r

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