Quantum efficiency of stimulated emission in colloidal semiconductor nanocrystal quantum dots

Chunfeng Zhang; Jian Xu; Ting Zhu; Fan Zhang; Zhanao Tan; Steven Schiff; Huaipeng Su; Shuai Gao; Andrew Y. Wang

doi:10.1103/PhysRevB.80.035333

Quantum efficiency of stimulated emission in colloidal semiconductor nanocrystal quantum dots

Chunfeng Zhang, Jian Xu, Ting Zhu, Fan Zhang, Zhanao Tan, Steven Schiff, Huaipeng Su, Shuai Gao, Andrew Y. Wang

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

External differential quantum efficiencies were studied for the stimulated emission of thin films of colloidal CdSe/CdS/ZnS nanocrystal quantum dots (NQDs) using the integrating sphere technique. A maximum efficiency of 34% was measured for the stimulated emission in NQDs which far exceeds that for spontaneous emission (9%). The competition between the radiative exciton/biexciton recombination and the carrier density-dependent nonradiative relaxation processes in NQDs was modeled to account for the observed difference in efficiency.

Original language	English (US)
Article number	035333
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevB.80.035333
State	Published - Aug 6 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.035333

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title = "Quantum efficiency of stimulated emission in colloidal semiconductor nanocrystal quantum dots",

abstract = "External differential quantum efficiencies were studied for the stimulated emission of thin films of colloidal CdSe/CdS/ZnS nanocrystal quantum dots (NQDs) using the integrating sphere technique. A maximum efficiency of 34% was measured for the stimulated emission in NQDs which far exceeds that for spontaneous emission (9%). The competition between the radiative exciton/biexciton recombination and the carrier density-dependent nonradiative relaxation processes in NQDs was modeled to account for the observed difference in efficiency.",

author = "Chunfeng Zhang and Jian Xu and Ting Zhu and Fan Zhang and Zhanao Tan and Steven Schiff and Huaipeng Su and Shuai Gao and Wang, {Andrew Y.}",

year = "2009",

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doi = "10.1103/PhysRevB.80.035333",

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volume = "80",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Quantum efficiency of stimulated emission in colloidal semiconductor nanocrystal quantum dots

AU - Zhang, Chunfeng

AU - Xu, Jian

AU - Zhu, Ting

AU - Zhang, Fan

AU - Tan, Zhanao

AU - Schiff, Steven

AU - Su, Huaipeng

AU - Gao, Shuai

AU - Wang, Andrew Y.

PY - 2009/8/6

Y1 - 2009/8/6

N2 - External differential quantum efficiencies were studied for the stimulated emission of thin films of colloidal CdSe/CdS/ZnS nanocrystal quantum dots (NQDs) using the integrating sphere technique. A maximum efficiency of 34% was measured for the stimulated emission in NQDs which far exceeds that for spontaneous emission (9%). The competition between the radiative exciton/biexciton recombination and the carrier density-dependent nonradiative relaxation processes in NQDs was modeled to account for the observed difference in efficiency.

AB - External differential quantum efficiencies were studied for the stimulated emission of thin films of colloidal CdSe/CdS/ZnS nanocrystal quantum dots (NQDs) using the integrating sphere technique. A maximum efficiency of 34% was measured for the stimulated emission in NQDs which far exceeds that for spontaneous emission (9%). The competition between the radiative exciton/biexciton recombination and the carrier density-dependent nonradiative relaxation processes in NQDs was modeled to account for the observed difference in efficiency.

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DO - 10.1103/PhysRevB.80.035333

M3 - Article

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SN - 1098-0121

VL - 80

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 3

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ER -

Quantum efficiency of stimulated emission in colloidal semiconductor nanocrystal quantum dots

Abstract

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