Electron-phonon interactions in semiconductor nanocrystals

Research output: Contribution to journalArticle

162 Citations (Scopus)

Abstract

The electron-phonon interactions in semiconductor nanocrystals, especially concerning the acoustic phonon modes are derived and the size dependence of the coupling strength is clarified for typical coupling mechanisms. On the basis of these results, the commonly observed linearly temperature-dependent term of the excitonic dephasing rate and the proportionality of its magnitude to the inverse square of the nanocrystal size are attributed to the pure dephasing due to the deformation-potential coupling. The luminescence Stokes shift and the Huang-Rhys factor due to acoustic phonon modes in Si nanocrystals are discussed in conjunction with the origin of the recently observed luminescence onset energy.

Original languageEnglish
Pages (from-to)129-143
Number of pages15
JournalJournal of Luminescence
Volume70
Issue number1-6 SPEC. ISS.
Publication statusPublished - 1996 Oct
Externally publishedYes

Fingerprint

Electron-phonon interactions
electron phonon interactions
Nanocrystals
nanocrystals
Semiconductor materials
Luminescence
Acoustics
luminescence
acoustics
shift
Temperature
temperature
energy

Keywords

  • Electron-phonon interaction
  • Nanocrystals
  • Semiconductors

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Electron-phonon interactions in semiconductor nanocrystals. / Takagahara, Toshihide.

In: Journal of Luminescence, Vol. 70, No. 1-6 SPEC. ISS., 10.1996, p. 129-143.

Research output: Contribution to journalArticle

@article{202e2cc609bd4e6591a981fab40d94d6,
title = "Electron-phonon interactions in semiconductor nanocrystals",
abstract = "The electron-phonon interactions in semiconductor nanocrystals, especially concerning the acoustic phonon modes are derived and the size dependence of the coupling strength is clarified for typical coupling mechanisms. On the basis of these results, the commonly observed linearly temperature-dependent term of the excitonic dephasing rate and the proportionality of its magnitude to the inverse square of the nanocrystal size are attributed to the pure dephasing due to the deformation-potential coupling. The luminescence Stokes shift and the Huang-Rhys factor due to acoustic phonon modes in Si nanocrystals are discussed in conjunction with the origin of the recently observed luminescence onset energy.",
keywords = "Electron-phonon interaction, Nanocrystals, Semiconductors",
author = "Toshihide Takagahara",
year = "1996",
month = "10",
language = "English",
volume = "70",
pages = "129--143",
journal = "Journal of Luminescence",
issn = "0022-2313",
publisher = "Elsevier",
number = "1-6 SPEC. ISS.",

}

TY - JOUR

T1 - Electron-phonon interactions in semiconductor nanocrystals

AU - Takagahara, Toshihide

PY - 1996/10

Y1 - 1996/10

N2 - The electron-phonon interactions in semiconductor nanocrystals, especially concerning the acoustic phonon modes are derived and the size dependence of the coupling strength is clarified for typical coupling mechanisms. On the basis of these results, the commonly observed linearly temperature-dependent term of the excitonic dephasing rate and the proportionality of its magnitude to the inverse square of the nanocrystal size are attributed to the pure dephasing due to the deformation-potential coupling. The luminescence Stokes shift and the Huang-Rhys factor due to acoustic phonon modes in Si nanocrystals are discussed in conjunction with the origin of the recently observed luminescence onset energy.

AB - The electron-phonon interactions in semiconductor nanocrystals, especially concerning the acoustic phonon modes are derived and the size dependence of the coupling strength is clarified for typical coupling mechanisms. On the basis of these results, the commonly observed linearly temperature-dependent term of the excitonic dephasing rate and the proportionality of its magnitude to the inverse square of the nanocrystal size are attributed to the pure dephasing due to the deformation-potential coupling. The luminescence Stokes shift and the Huang-Rhys factor due to acoustic phonon modes in Si nanocrystals are discussed in conjunction with the origin of the recently observed luminescence onset energy.

KW - Electron-phonon interaction

KW - Nanocrystals

KW - Semiconductors

UR - http://www.scopus.com/inward/record.url?scp=0030261324&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030261324&partnerID=8YFLogxK

M3 - Article

VL - 70

SP - 129

EP - 143

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

IS - 1-6 SPEC. ISS.

ER -