期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 5, 页码 3742-3749出版社
AMER CHEMICAL SOC
DOI: 10.1021/am500308d
关键词
photoisomerization; smart surface design; dye-sensitized solar cells; azo dye; optoelectronic materials
资金
- Fulbright Commission
- DOE Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- EPSRC UK National Service for Computational Chemistry Software (NSCCS), based at Imperial College London
- EPSRC [EP/J003921/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J003921/1] Funding Source: researchfish
The optical and electronic properties of a TiO2 nanoparticle-assisted photo-isomerizable surface, prepared by an azo dye/TiO, nanocomposite film, are examined experimentally and computationally. The azo dye, para-methyl red, undergoes photoisomerization at room temperature, catalyzed by the TiO2 nanoparticle supports, while it exhibits negligible photoisomerization in solvents under otherwise identical conditions. Density functional theory and time-dependent density functional theory are employed to explain the origin of this photoisomerization in these dye center dot center dot center dot TiO2 nanoparticle self-assembled monolayers (SAMs). The device performance of these SAMs when embedded into dye-sensitized solar cells is used to further elucidate the nature of this azo dye photoisomerization and relate it to the ensuing optoelectronic properties.
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