Sensitization of n-Type TiO2 Electrode by a Novel Isoquinoline Ruthenium(II) Polypyridyl Complex

Garcia, Christian Graziani; Iha, Neyde Yukie Murakami; Argazzi, Roberto; Bignozzi, Carlo Alberto

doi:10.1590/s0103-50531998000100003

Cited by 16 publications

(17 citation statements)

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“…The molecular sensitizers were synthesized following the procedures described in the literature [7,8]. The dyes were attached to the TiO 2 surface by immersing the processed electrode in 10 −4 M ethanolic solutions of the corresponding complexes.…”

Section: Thin-layer Solar Cellmentioning

confidence: 99%

“…Photoelectrochemical experiments were carried out by using the dye-sensitized TiO 2 films incorporated into thin-layer sandwich-type solar cells as described in the literature [7,8]. The photoanode consists of the TiO 2 film sensitized by a molecular sensitizer on a FTO substrate.…”

Section: Thin-layer Solar Cellmentioning

confidence: 99%

“…We have been investigating and developing regenerative thin-layer solar cells based on the dye sensitization of nanocrystalline n-TiO 2 [7][8][9][10]. In this work, preparation of TiO 2 emulsions from distinct methods were performed and compared.…”

Section: Introductionmentioning

confidence: 99%

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An interdisciplinary experience on the development of Dye-Cell technology

Garcia

Iha

2001

International Journal of Photoenergy

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Abstract. Under a special program supported by the University of São Paulo (USP) for the development of strategic fields of research, interdisciplinar discussion on the development of photovoltaics and energy technology has been established. Several aspects concerned to solar energy and PV technology were discussed in regular meetings along a year by professionals of different domains. As a result of the program, a collaborative work on the deposition of TiO 2 films employed in photoelectrochemical solar cells has been established between the Laboratory of Inorganic Photochemistry and Energy Conversion at the IQ-USP and other research groups.Preparation of TiO 2 emulsions from distinct methods were performed and compared. Spin-coating and painting techniques have been employed for the deposition of TiO 2 films over TCO substrates. Both techniques resulted in transparent homogeneous TiO 2 films which were successfully used as dye-sensitized photoanodes in solar cells. The results show that thin-film properties, such as thickness and transparency, can be controlled through the deposition technique and that photoelectrochemical measurements carried out by our group have been performed under appropriate film deposition conditions. This experience shows also that different institutions, with distinct purposes, can interact and work together to prepare qualified professionals for many areas of modern science and technology.

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Section: Thin-layer Solar Cellmentioning

confidence: 99%

Section: Thin-layer Solar Cellmentioning

confidence: 99%

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An interdisciplinary experience on the development of Dye-Cell technology

Garcia

Iha

2001

International Journal of Photoenergy

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“…As one of these promising devices, we have been developing thin-layer, transparent sandwichtype solar cells (Murakami Iha et al 1998, Garcia et al 1998a,b 1999. The cell, as in Figure 1, consists of a fluorine doped SnO 2 conducting glass, FCO, with the n-TiO 2 film sensitized by a complex, as a photoanode, and a transparent Pt film on a conducting glass, as a counter electrode, arranged in a sandwich configuration with LiI/I 2 solution, as the redox relay, filling the inter-electrode space.…”

Section: Solar Cellsmentioning

confidence: 99%

“…The cell, as in Figure 1, consists of a fluorine doped SnO 2 conducting glass, FCO, with the n-TiO 2 film sensitized by a complex, as a photoanode, and a transparent Pt film on a conducting glass, as a counter electrode, arranged in a sandwich configuration with LiI/I 2 solution, as the redox relay, filling the inter-electrode space. A series of sensitizers, cis-[(dcbH 2 ) 2 RuLL'] derivatives, where L and L' = H 2 O, X − , 4-phenylpyridine, isoquinoline, 4-cyanopyridine etc., and dcbH 2 = 4,4'-(CO 2 H) 2 -2,2'-bipyridine, were specially engineered and synthesized to promote electron injection after light excitation (Garcia et al 1998a(Garcia et al ,b 1999. These compounds have good sensitizing properties due to broad absorption spectra with intense MLCT bands overlapping the solar spectrum, combined with suitable redox properties.…”

Section: Solar Cellsmentioning

confidence: 99%

Supramolecular photochemistry and solar cells

Iha

2000

An. Acad. Bras. Ciênc.

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Supramolecular photochemistry as well as solar cells are fascinating topics of current interest in Inorganic Photochemistry and very active research fields which have attracted wide attention in last two decades. A brief outline of the investigations in these fields carried out in our Laboratory of Inorganic Photochemistry and Energy Conversion is given here with no attempt of an exhaustive coverage of the literature. The emphasis is placed on recent work and information on the above mentioned subjects. Three types of supramolecular systems have been the focus of this work: (i) cage-type coordination compounds; (ii) second-sphere coordination compounds, exemplified by ion-pair photochemistry of cobalt complexes and (iii) covalently-linked systems. In the latter, modulation of the photoluminescence and photochemistry of some rhenium complexes are discussed. Solar energy conversion and development of thin-layer photoelectrochemical solar cells based on sensitization of nanocrystalline semiconductor films by some ruthenium polypyridyl complexes are presented as an important application that resulted from specifically engineered artificial assemblies.

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