Communication: Uncovering molecule-TiO2 interactions with nonlinear spectroscopy

被引：15

作者：

Miller, Stephen A. ^{[1
]}

West, Brantley A. ^{[2
]}

Curtis, Anna C. ^{[1
]}

Papanikolas, John M. ^{[1
]}

Moran, Andrew M. ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

[2] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2011年 / 135卷 / 08期

关键词：

ULTRAFAST ELECTRON-TRANSFER; SENSITIZED SOLAR-CELLS; SPECTRAL INTERFEROMETRY; CHARGE-TRANSFER; QUANTUM DOTS; DYNAMICS; FILMS; NANOPARTICLES; ANATASE; TIO2;

D O I：

10.1063/1.3631339

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：

Femtosecond transient grating experiments are used to investigate electronic structures and transport mechanisms in dye-sensitized nanocrystalline TiO2 films. This study examines two molecular sensitizers spanning the weak (a phosphonated Ruthenium complex) and strong (catechol) molecule-TiO2 coupling regimes. It is shown that strong molecule-TiO2 interactions give rise to photoinduced vibrational coherences at the interface between species. We suggest that the amplitudes of these coherences reflect the molecule-TiO2 coupling strength and signify the delocalization of excited state wavefunctions. (C) 2011 American Institute of Physics. [doi:10.1063/1.3631339]

引用

页数：4

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