Photosensitized generation of singlet oxygen in powders and aqueous suspensions of silicon nanocrystals

被引：17
|
作者：
Ryabchikov, Yu V. [1 ]
Belogorokhov, I. A. [2 ]
Gongalskii, M. B. [3 ]
Osminkina, L. A. [3 ]
Timoshenko, V. Yu [3 ]
机构：
[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
[2] Rare Met Ind GIREDMET, State Res & Design Inst, Moscow 119017, Russia
[3] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia
来源：
SEMICONDUCTORS | 2011年 / 45卷 / 08期
关键词：
POROUS SILICON; FABRICATION;
D O I：
10.1134/S106378261108015X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The photoluminescence spectra and kinetics in powders and aqueous suspensions produced from porous silicon layers are studied. The systematic features of photosensitized generation of singlet oxygen by silicon nanocrystals in the samples are established. The dependence of the efficiency of generation of singlet oxygen on the pressure of molecular oxygen is analyzed. It is concluded that the generation can be described on the basis of concepts of energy transfer from photoexcited silicon nanocrystals to oxygen molecules adsorbed at the nanocrystal surface to the concentration described by Langmuir's adsorption model. The processes limiting the efficiency of photosensitized generation of singlet oxygen in the systems are discussed.
引用
收藏
页码：1059 / 1063
页数：5
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