Photoinduced ultrafast dynamics of coumarin 343 sensitized p-type-nanostructured NiO films

Article Abstract:

The photoinduced electron transfer from a nanostructured wide band-gap p-type semiconductor, NiO, to an excited bound dye, coumarin 343, and the subsequent recombination are measured. It is found that both processes are nonexponential and the photoinduced electron transfer from the semiconductor to the excited bound dye has an ultrafast components, which is comparable to the time constants measured for photoinduced electron injection in C343-TiO2 colloid solutions.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Thin Film Materials, Coumarin, Thin films, Optical properties, Electron transport, Dielectric films, Coumarins, Atomic properties

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Sensitized hole injection of phosphorus porphyrin into NiO: Toward new photovoltaic devices

Article Abstract:

The preparation and the characterization of a photovoltaic cell based on the sensitization of a wide band gap p-type semiconductor (NiO) with a phosphorus porphyrin are described. A photophysical study with femtosecond transient absorption spectroscopy showed that light excitation of the phosphorus prophyin chemisorbed on NiO particles induces a very rapid interfacial hole injection into the valence band of NiO, occurring mainly on the 2-20 ps time scale.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Porphyrins, Absorption spectra, Chemical properties

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Spectroelectrochemistry of nanostructured NiO

Article Abstract:

Heating Ni(OH) (sub 2) sol-gel films does preparation of transparent nanostructured NiO electrodes. Following various processes, nanostructured NiO promises to be a material for electrochromic devices and electrochemical capacitors.

Spectrum analysis, Spectra, Spectroscopy, Electrochemistry, Structure

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