Carrier localization and cooling in dye-sensitized nanocrystalline titanium dioxide

被引：206
|
作者：
Turner, GM [1 ]
Beard, MC [1 ]
Schmuttenmaer, CA [1 ]
机构：
[1] Yale Univ, Dept Chem, New Haven, CT 06520 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 45期
关键词：
D O I：
10.1021/jp025844e
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 transient photoconductivity of dye-sensitized titanium dioxide has been measured using time-resolved terahertz spectroscopy, a noncontact electrical probe with sub-picosecond temporal resolution. The photoconductivity deviates strongly from Drude behavior and is explained by disorder-induced carrier localization and/or backscattering of the photogenerated carriers. In addition, the carriers are found to thermally equilibrate with the lattice in roughly 300 fs. Ramifications for understanding the function of DSSCs and electrical transport in disordered media are discussed.
引用
收藏
页码：11716 / 11719
页数：4
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