The fate of charge carriers in solar materials investigated by time resolved X-ray and optical spectroscopy
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The main features of the characteristic impedance spectra of dye-sensitized solar cells are described in a wide range of potential conditions: from open to short circuit. An equivalent circuit model was proposed to describe the parameters of electron trans ...
Nanocryst. TiO2 films, surface modified with Al3+, were manufd. by depositing a TiO2 suspension contg. small amts. of Al nitrate or Al chloride onto conducting glass substrates, followed by drying, compression, and finally heating to 530°. Electrodes prepd ...
Ultrafast spectroscopy was used to study the relaxation processes of charge carriers in ZnO nanocryst. thin films. A broad red-IR absorption band linked to shallowly trapped electrons was obsd. by spectroelectrochem. measurements. Femtosecond transient abs ...
A zinc phthalocyanine with tyrosine substituents (ZnPcTyr), modified for efficient far-red/near-IR performance in dye-sensitized nanostructured TiO2 solar cells, and its ref., glycine-substituted zinc phthalocyanine (ZnPcGly), were synthesized and characte ...
The anchoring of the ruthenium dye {(C4H9)4N}[Ru(Htcterpy)(NCS)3] (tcterpy = 4,4',4''-tricarboxy-2,2':6',2''-terpyridine), the so-called black dye, onto nanocryst. TiO2 films has been characterized by UV-visible and FTIR spectroscopies. FTIR spectroscopy d ...
A ruthenium complex trans-[Ru(L)(NCS)2], L ) 4,4¢¢¢-di- tert-butyl-4¢,4¢¢-bis(carboxylic acid)-2,2¢:6¢,2¢¢:6¢¢,2¢¢¢- quaterpyridine (N886), was synthesized and characterized by spectroscopic and electrochemical methods. The absorption spectrum of the N886 ...
There has been intense interest and debate concerning the electron transfer rates within dye-sensitized nanostructured n-type semiconductors (such as TiO2). The motivation for this research has been the development of solar cells in which the first step is ...
The new dye complex bis[4,4'-di(2-(3-methoxyphenyl)ethenyl)-2,2'-bipyridine][4,4'-dicarboxy-2,2'-bipyridine]ruthenium(II) dihexafluorophosphate (1) was prepd., characterized by absorption spectroscopy and adsorbed onto nanocryst. TiO2 electrodes. The resul ...
The laser induced photocurrent transient and capacitance measurements were used to study the charge carrier sepn. and charge transport in single-crystal porous TiO2 electrodes. The fast photocurrent component was due to the transport of free electrons thro ...
