Physical Review B, volume 89, issue 8, publication number 081303

Experimental observation of exciton splitting and relaxation dynamics from PbS quantum dots in a glass matrix

Fangyu Yue ^{1, 2}

Jens W. Tomm ¹

Jens Tomm ¹

D. Kruschke ³

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Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Straße 2A, 12489 Berlin, Germany |

Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 200241 Shanghai, Peoples's Republic of China |

Institut für Angewandte Photonik e.V., Rudower Chaussee 29/31, 12489 Berlin, Germany |

Publication type: Journal Article

Publication date: 2014-02-10

American Physical Society (APS)

Journal: Physical Review B

Quartile SCImago

Quartile WOS

Impact factor: 3.7

ISSN: 24699950, 24699969, 10980121, 1550235X

DOI: 10.1103/physrevb.89.081303

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Electronic, Optical and Magnetic Materials

Condensed Matter Physics

Abstract

Multiple optical transitions from PbS quantum dots (QDs) in glass matrix are observed. Energy separations between them amount up to $\ensuremath{\sim}$200 meV. Instead of being due to a size distribution of QDs, they are found to be related to a splitting of the lowest exciton levels. Systematic analysis of the relaxation dynamics reveals the lifetimes of the split states ranging from sub-100-ns to $\ensuremath{\sim}$$\ensuremath{\mu}$s. Moreover, we observe excited and ``intrinsic'' states having a sub-100-ps and $\ensuremath{\sim}$ns lifetime, respectively. The behavior of the split structure can be modeled by a phonon-assisted relaxation mechanism. This investigation offers a conclusive interpretation for the wide distribution of experimentally observed nonequilibrium carrier lifetimes in PbS QDs.

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Yue F. et al. Experimental observation of exciton splitting and relaxation dynamics from PbS quantum dots in a glass matrix // Physical Review B. 2014. Vol. 89. No. 8. 081303

GOST all authors (up to 50) Copy

Yue F., Yue F., Tomm J. W., Tomm J., Kruschke D. Experimental observation of exciton splitting and relaxation dynamics from PbS quantum dots in a glass matrix // Physical Review B. 2014. Vol. 89. No. 8. 081303

RIS |

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RIS Copy

TY - JOUR

DO - 10.1103/physrevb.89.081303

UR - https://doi.org/10.1103/physrevb.89.081303

TI - Experimental observation of exciton splitting and relaxation dynamics from PbS quantum dots in a glass matrix

T2 - Physical Review B

AU - Yue, Fangyu

AU - Tomm, Jens W.

AU - Kruschke, D.

AU - Yue, Fangyu

AU - Tomm, Jens

PY - 2014

DA - 2014/02/10 00:00:00

PB - American Physical Society (APS)

IS - 8

VL - 89

SN - 2469-9950

SN - 2469-9969

SN - 1098-0121

SN - 1550-235X

ER -

BibTex

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BibTex Copy

@article{2014_Yue,

author = {Fangyu Yue and Jens W. Tomm and D. Kruschke and Fangyu Yue and Jens Tomm},

title = {Experimental observation of exciton splitting and relaxation dynamics from PbS quantum dots in a glass matrix},

journal = {Physical Review B},

year = {2014},

volume = {89},

publisher = {American Physical Society (APS)},

month = {feb},

url = {https://doi.org/10.1103/physrevb.89.081303},

number = {8},

doi = {10.1103/physrevb.89.081303}

}

Found error?

Publisher

American Physical Society (APS)

Journal

Physical Review B

Quartile SCImago

Quartile WOS

Impact factor

3.7

ISSN

24699950 (Print)
24699969 (Electronic)
10980121 (Print)
1550235X (Electronic)