Carrier recombination dynamics in anatase TiO2 nanoparticles

被引：14
|
作者：
Cavigli, Lucia [1 ,2 ]
Bogani, Franco [1 ]
Vinattieri, Anna [2 ]
Cortese, Lorenzo [2 ]
Colocci, Marcello [2 ]
Faso, Valentina [3 ]
Baldi, Giovanni [3 ]
机构：
[1] Univ Florence, Dipartimento Energet, I-50134 Florence, FI, Italy
[2] Univ Florence, Dipartimento Fis & Lens, I-50019 Sesto Fiorentino, FI, Italy
[3] Ce Ri Col Colorobbia Italia, I-50053 Sovigliana Vinci, FI, Italy
来源：
SOLID STATE SCIENCES | 2010年 / 12卷 / 11期
关键词：
Anatase TiO2; Time resolved photoluminescence; Relaxation process; Self trapped exciton; PHOTOLUMINESCENCE; LUMINESCENCE; FILMS;
D O I：
10.1016/j.solidstatesciences.2010.01.036
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We present an experimental study of the radiative recombination dynamics in size-controlled TiO2 nanoparticles in the range 20-130 nm Time-integrated photoluminescence spectra clearly show a dominance of self-trapped exciton (STE) emission with main features not dependent on the nanoparticle size and on its environment From picosecond time-resolved experiments as a function of the excitation density and the nanoparticle size we address the STE recombination dynamics as the result of two main processes related to the direct STE formation and to the indirect STE formation mediated by non-radiative surface states (C) 2010 Elsevier Masson SAS All rights reserved
引用
收藏
页码：1877 / 1880
页数：4
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