All-silicon solid films with highly efficient and tunable full-color photoluminescence

被引:4
|
作者
Wang, Jing [1 ,2 ]
Wu, Xinglong [2 ]
Li, Tinghui [2 ,3 ]
Chu, Paul K. [4 ]
机构
[1] Nanjing Univ Posts & Telecommun, Sch Elect Sci & Engn, Nanjing 210003, Jiangsu, Peoples R China
[2] Nanjing Univ, Inst Acoust, Dept Phys, Key Lab Modern Acoust,MOE, Nanjing 210093, Jiangsu, Peoples R China
[3] Guangxi Normal Univ, Coll Elect Engn, Guilin 541004, Peoples R China
[4] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
关键词
Si nanocrystals; Glycerol passivation; Quantum confinement effect; Tunable photoluminescence; QUANTUM DOTS; NANOCRYSTALS;
D O I
10.1016/j.scriptamat.2013.12.004
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Silicon nanocrystals with the most probable diameter of 2 nm are surface passivated by glycerol and deposited on porous silicon (PS) substrate with intrinsic red photoluminescence. Tunable full-color emission is observed from this composite film and the quantum efficiency varies from 17% to 28% under different excitation wavelengths. Spectral analysis reveals that the full-color emission arises from combined quantum confinement in the silicon and PS nanocrystals with glycerol passivation. The nanostructured allsilicon film is robust and compatible with microelectronic processing. (C) 2013 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
引用
收藏
页码:17 / 20
页数:4
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