TY - JOUR
T1 - Visible photoluminescence from oxidized Si nanometer-sized spheres
T2 - Exciton confinement on a spherical shell
AU - Kanemitsu, Yoshihiko
AU - Ogawa, Tetsuo
AU - Shiraishi, Kenji
AU - Takeda, Kyozaburo
PY - 1993/1/1
Y1 - 1993/1/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.48.4883
DO - 10.1103/PhysRevB.48.4883
M3 - Article
AN - SCOPUS:35949006582
VL - 48
SP - 4883
EP - 4886
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 7
ER -