Electron Dynamics in Anatase TiO2 Nanoparticles by Ultrafast Broadband Deep-Ultraviolet Spectroscopy

被引：0
|
作者：
Baldini, Edoardo [1 ,2 ]
Palmieri, Tania [1 ,2 ]
Pomarico, Enrico [1 ,2 ]
Auboeck, Gerald [1 ,2 ]
Chergui, Majed [1 ,2 ]
机构：
[1] Ecole Polytech Fed Lausanne EPFL, Lab Ultrafast Spect, ISIC, CH-1015 Lausanne, Switzerland
[2] Ecole Polytech Fed Lausanne EPFL, Lausanne Ctr Ultrafast Sci LACUS, CH-1015 Lausanne, Switzerland
来源：
XXI INTERNATIONAL CONFERENCE ON ULTRAFAST PHENOMENA 2018 (UP 2018) | 2019年 / 205卷
关键词：
D O I：
10.1051/epjconf/201920505017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The optical bandgap of anatase TiO2 nanoparticles is dominated by bulk absorption bands in the deep-ultraviolet due to strongly bound excitons. These spectral features can be utilized as a sensitive probe of carrier and lattice dynamics inside the TiO2 nanoparticles. Here, we implement ultrafast broadband spectroscopy tuned to the exciton resonances in order to track the electron cooling in the conduction band of bare anatase nanoparticles and monitor the electron injection dynamics from an external dye in the case of sensitized anatase nanoparticles.
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页数：3
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