Internal electric field in wurtzite ZnO Zn0.78Mg0.22O quantum wells

C. Morhain; T. Bretagnon; P. Lefebvre; X. Tang; P. Valvin; T. Guillet; B. Gil; T. Taliercio; M. Teisseire-Doninelli; B. Vinter; C. Deparis

doi:10.1103/PhysRevB.72.241305

Internal electric field in wurtzite ZnO Zn0.78Mg0.22O quantum wells

C. Morhain, T. Bretagnon, P. Lefebvre, X. Tang, P. Valvin, T. Guillet, B. Gil, T. Taliercio, M. Teisseire-Doninelli, B. Vinter, C. Deparis

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

226 Scopus citations

Abstract

Continuous-wave, time-integrated, and time-resolved photoluminescence experiments are used to study the excitonic optical recombinations in wurtzite ZnO Zn0.78Mg0.22O quantum wells of varying widths. By comparing experimental results with a variational calculation of excitonic energies and oscillator strengths, we determine the magnitude (0.9MV cm) of the longitudinal electric field that is induced by both spontaneous and piezoelectric polarizations. The quantum-confined Stark effect counteracts quantum confinement effects for well widths larger than 3nm, leading to emission energies that can lie 0.5eV below the ZnO excitonic gap and to radiative lifetimes that can be larger than milliseconds.

Original language	English
Article number	241305
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.72.241305
State	Published - 15 Dec 2005
Externally published	Yes

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title = "Internal electric field in wurtzite ZnO Zn0.78Mg0.22O quantum wells",

abstract = "Continuous-wave, time-integrated, and time-resolved photoluminescence experiments are used to study the excitonic optical recombinations in wurtzite ZnO Zn0.78Mg0.22O quantum wells of varying widths. By comparing experimental results with a variational calculation of excitonic energies and oscillator strengths, we determine the magnitude (0.9MV cm) of the longitudinal electric field that is induced by both spontaneous and piezoelectric polarizations. The quantum-confined Stark effect counteracts quantum confinement effects for well widths larger than 3nm, leading to emission energies that can lie 0.5eV below the ZnO excitonic gap and to radiative lifetimes that can be larger than milliseconds.",

author = "C. Morhain and T. Bretagnon and P. Lefebvre and X. Tang and P. Valvin and T. Guillet and B. Gil and T. Taliercio and M. Teisseire-Doninelli and B. Vinter and C. Deparis",

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doi = "10.1103/PhysRevB.72.241305",

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T1 - Internal electric field in wurtzite ZnO Zn0.78Mg0.22O quantum wells

AU - Morhain, C.

AU - Bretagnon, T.

AU - Lefebvre, P.

AU - Tang, X.

AU - Valvin, P.

AU - Guillet, T.

AU - Gil, B.

AU - Taliercio, T.

AU - Teisseire-Doninelli, M.

AU - Vinter, B.

AU - Deparis, C.

PY - 2005/12/15

Y1 - 2005/12/15

N2 - Continuous-wave, time-integrated, and time-resolved photoluminescence experiments are used to study the excitonic optical recombinations in wurtzite ZnO Zn0.78Mg0.22O quantum wells of varying widths. By comparing experimental results with a variational calculation of excitonic energies and oscillator strengths, we determine the magnitude (0.9MV cm) of the longitudinal electric field that is induced by both spontaneous and piezoelectric polarizations. The quantum-confined Stark effect counteracts quantum confinement effects for well widths larger than 3nm, leading to emission energies that can lie 0.5eV below the ZnO excitonic gap and to radiative lifetimes that can be larger than milliseconds.

AB - Continuous-wave, time-integrated, and time-resolved photoluminescence experiments are used to study the excitonic optical recombinations in wurtzite ZnO Zn0.78Mg0.22O quantum wells of varying widths. By comparing experimental results with a variational calculation of excitonic energies and oscillator strengths, we determine the magnitude (0.9MV cm) of the longitudinal electric field that is induced by both spontaneous and piezoelectric polarizations. The quantum-confined Stark effect counteracts quantum confinement effects for well widths larger than 3nm, leading to emission energies that can lie 0.5eV below the ZnO excitonic gap and to radiative lifetimes that can be larger than milliseconds.

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U2 - 10.1103/PhysRevB.72.241305

DO - 10.1103/PhysRevB.72.241305

M3 - 文章

AN - SCOPUS:29644435687

SN - 1098-0121

VL - 72

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 24

M1 - 241305

ER -

Internal electric field in wurtzite ZnO Zn0.78Mg0.22O quantum wells

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