Visible photoluminescence from oxidized Si nanometer-sized spheres: Exciton confinement on a spherical shell

Yoshihiko Kanemitsu, Tetsuo Ogawa, Kenji Shiraishi, Kyozaburo Takeda

研究成果: Article

502 引用 (Scopus)

抄録

We report strong visible photoluminescence (PL) at room temperature from oxidized Si nanometer-sized spheres with a spherical crystalline Si (c-Si) core and an amorphous SiO2 (a-SiO2) surface layer. The peak energy of the broad PL spectrum is about 1.65 eV, which is independent of the core diameter. We propose a model in which excitons are confined on a spherical shell, an interfacial layer between the c-Si core and the a-SiO2 surface layer, and in which the exciton confinement enhances the oscillator strength and the PL intensity.

元の言語English
ページ(範囲)4883-4886
ページ数4
ジャーナルPhysical Review B
48
発行部数7
DOI
出版物ステータスPublished - 1993
外部発表Yes

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spherical shells
Excitons
Photoluminescence
excitons
photoluminescence
surface layers
Crystalline materials
oscillator strengths
room temperature
LDS 751
Temperature
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

Visible photoluminescence from oxidized Si nanometer-sized spheres : Exciton confinement on a spherical shell. / Kanemitsu, Yoshihiko; Ogawa, Tetsuo; Shiraishi, Kenji; Takeda, Kyozaburo.

:: Physical Review B, 巻 48, 番号 7, 1993, p. 4883-4886.

研究成果: Article

Kanemitsu, Yoshihiko ; Ogawa, Tetsuo ; Shiraishi, Kenji ; Takeda, Kyozaburo. / Visible photoluminescence from oxidized Si nanometer-sized spheres : Exciton confinement on a spherical shell. :: Physical Review B. 1993 ; 巻 48, 番号 7. pp. 4883-4886.
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