Temperature dependence of the photoluminescence emission from thiol-capped PbS quantum dots

Turyanska, L. and Patanè, A. and Henini, M. and Hennequin, B. and Thomas, N. R. (2007) Temperature dependence of the photoluminescence emission from thiol-capped PbS quantum dots. Applied Physics Letters, 90 (10). ISSN 0003-6951

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Abstract

The authors report the temperature dependence of the near-infrared photoluminescence (PL) emission from thiol-capped PbS quantum dots. The high thermal stability of the PL allows the authors to study the thermal broadening of the dot emission over an extended temperature range (4-300 K). The authors show that the linewidth of the dot PL emission is strongly enhanced at temperatures above 150 K. This behavior is attributed to dephasing of the quantum electronic states by carrier interaction with longitudinal optical phonons. The authors' data also indicate that the strength of the carrier-phonon coupling is larger in smaller dots. © 2007 American Institute of Physics.

Keywords:Electronic states, Lead compounds, Phonons, Photoluminescence, Quantum electronics, Semiconductor quantum dots, Near infrared photoluminescence, Optical phonons, Quantum electronic states, Temperature dependence, Light emission
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Chemistry
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ID Code:22581
Deposited On:25 Mar 2016 21:15

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