Resonant energy transfer from nanocrystal Si to β-FeSi2 in hybrid Si/β-FeSi2 film

The photoluminescence （PL） characteristics of hybrid β-FeSi2/Si and pure β-FeSi2 films fabricated by pulsed laser deposition at 20 K are investigated. The intensity of the 1.54-μm PL from the former is enhanced, but the enhancement vanishes when the excitation wavelength is larger than the widened b...

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Bibliographic Details
Published in中国物理B：英文版 no. 10; pp. 52 - 55
Main Author 何久洋 张祺桢 吴兴龙 朱剑豪
Format Journal Article
LanguageEnglish
Published 01.10.2013
Subjects
共振
混合动力
电影
硅纳米晶体
纳米晶硅
能量转移
脉冲激光沉积
荧光寿命
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/22/10/106804

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Summary:The photoluminescence （PL） characteristics of hybrid β-FeSi2/Si and pure β-FeSi2 films fabricated by pulsed laser deposition at 20 K are investigated. The intensity of the 1.54-μm PL from the former is enhanced, but the enhancement vanishes when the excitation wavelength is larger than the widened band gap of Si nanocrystal. Time-resolved PL decay measurements reveal that the lifetime of the photo-excited carriers in the hybrid β-FeSi2/Si film is longer than that in the pure β-FeSi2 film, providing evidence that the PL enhancement results from the resonant charge transfer from nanocrystalline Si to β-FeSi2.
Bibliography:β-FeSi2 nanocrystal, photoluminescence, resonant charge transfer
11-5639/O4
The photoluminescence （PL） characteristics of hybrid β-FeSi2/Si and pure β-FeSi2 films fabricated by pulsed laser deposition at 20 K are investigated. The intensity of the 1.54-μm PL from the former is enhanced, but the enhancement vanishes when the excitation wavelength is larger than the widened band gap of Si nanocrystal. Time-resolved PL decay measurements reveal that the lifetime of the photo-excited carriers in the hybrid β-FeSi2/Si film is longer than that in the pure β-FeSi2 film, providing evidence that the PL enhancement results from the resonant charge transfer from nanocrystalline Si to β-FeSi2.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/22/10/106804