Metal complex sensitizers in dye-sensitized solar cells

Polo, André Sarto; Itokazu, Melina Kayoko; Iha, Neyde Yukie Murakami

doi:10.1016/j.ccr.2004.04.013

Cited by 508 publications

(329 citation statements)

References 121 publications

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“…Among the photosensitizers, transition metal-based sensitizers have shown best results in dyesensitization process. Transition metals such as Fe (II), Ru (II), and Os (II) form d 6 complex and undergo intense charge transfer absorption across the entire visible range [59]. However, metal-based sensitizers are not environment friendly, and thus researchers are now focusing on the use of natural dyes as an alternative for dye-sensitization process [59][60][61][62].…”

Section: Dye-sensitized Photocatalytic Degradation Of Phenol and Phenmentioning

confidence: 99%

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Chowdhury¹,

Nag²,

Ray³

2017

Phenolic Compounds - Natural Sources, Importance and Applications

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Phenolic compounds are found in surface and groundwater as well as wastewater from several industries. It is necessary to eliminate phenols and phenolic compounds from contaminated water before releasing into water bodies due to their toxicity to human beings. Photocatalytic degradation seems to be a promising technology for the degradation of several phenolic compounds. Complete mineralization of phenol and phenolic compound has been achieved with TiO 2 -based photocatalysts under both UV and visible-light irradiation. This chapter will evaluate the conventional processes and advanced oxidation processes for the degradation of phenol and phenolic compounds. The process economics and efficiencies of different advanced oxidation processes will also be discussed. The main focus of the chapter is photocatalytic degradation processes under UV and visible light along with a detailed review of several factors affecting degradation of phenol and phenolic compounds. Photocatalytic degradation process is governed by reactions with hydroxyl radical or superoxide ion. The extent of degradation depends on light sources (UV, visible, and solar), the type of photocatalyst, and experimental conditions (pH, photocatalyst dosage, initial concentration of phenolic compounds, light intensity, electron donor concentration, etc.). Visible-light-active photocatalysts are applied by several researchers to exploit sunlight and to make the photocatalysis process sustainable. In the future, using sunlight in place of UV could make photocatalysis economically more efficient.

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Section: Dye-sensitized Photocatalytic Degradation Of Phenol and Phenmentioning

confidence: 99%

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Chowdhury¹,

Nag²,

Ray³

2017

Phenolic Compounds - Natural Sources, Importance and Applications

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“…On the surface of the TiO 2 , a monolayer of visible light harvesting dye molecules is adsorbed resulting in the TiO 2 visible light sensitizing. A wide variety of dye molecules, included naturals dyes extracted from fruits flowers or leaves, have been proposed and tested (Polo et al, 2004;Kalyanasundaram & Graetzel, 1998). At the moment metallorganic ruthenium complexes containing anchoring groups such as carboxylic acid, dihydroxy, and phosphonic acid on pyridyl ligands show the best performances.…”

Section: Dye Solar Cells Architecture and Working Principlementioning

confidence: 99%

Dye Solar Cells: Basic and Photon Management Strategies

Dominici

Colonna²,

D’Ercole³

et al. 2011

Solar Cells - Dye-Sensitized Devices

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“…[6][7][8][9][10][11][12][13] Células solares com eficiências de até 11% vêm sendo preparadas empregando complexos de Ru(II) como sensibilizadores.…”

Section: 5unclassified

“…4,5 As células solares sensibilizadas por corante, Dye-Cells ® , são uma das possibilidades mais promissoras de aproveitar a energia solar para geração de eletricidade em bases competitivas com o custo atual da energia convencional. [6][7][8][9][10][11][12][13] Células solares com eficiências de até 11% vêm sendo preparadas empregando complexos de Ru(II) como sensibilizadores.…”

Section: Introductionunclassified

Em busca da sustentabilidade: células solares sensibilizadas por extratos naturais

Patrocínio¹,

Iha²

2010

Quím. Nova

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. Prof. Lineu Prestes, 748, 05508-900 São Paulo -SP, BrasilRecebido em 6/3/09; aceito em 28/9/09; publicado na web em 25/2/10 TOWARD SUSTAINABILITY: SOLAR CELLS SENSITIZED BY NATURAL EXTRACTS. The present work reports the use of anthocyanins extracted from mulberry (Morus Alba L.), raspberry (Rubus Idaeus L.) and blueberry (Vaccinium myrtillus L.) as sensitizers in dye-sensitized solar cells. The conversion efficiency of these devices is dependent on the extracts employed and can be rationalized in terms of their composition and spectral properties. Solar cells sensitized by the mulberry extract showed the highest efficiency among the fruits investigated. Moreover, a 16 cm 2 active area solar cell with the mulberry extract has presented fair good efficiency of conversion for natural dye-based solar cells, besides stability over twenty weeks, showing perspectives for developing these low cost devices with a commercial viability.Keywords: dye sensitized solar cells; anthocyanins; natural extracts. INTRODUÇÃOA sociedade vive atualmente o desafio de desenvolver ações que garantam simultaneamente a manutenção dos ecossistemas ao redor do mundo e a oferta de energia e de insumos à população. O acúmulo de CO 2 na atmosfera e todas as mudanças climáticas associadas a esse fenômeno são indicativos da necessidade de soluções em um prazo relativamente curto. 1-3Uma das metas para promover o desenvolvimento sustentável consiste em diversificar a matriz energética mundial e aumentar a contribuição das fontes renováveis de energia, como energia solar, eólica e biomassa. Dentre as energias renováveis, a energia solar se destaca pela enorme disponibilidade, 3x10 24 J por ano, o que supera o consumo mundial atual de 4.1x10 20 J. 4,5As células solares sensibilizadas por corante, Dye-Cells ® , são uma das possibilidades mais promissoras de aproveitar a energia solar para geração de eletricidade em bases competitivas com o custo atual da energia convencional. [6][7][8][9][10][11][12][13] Células solares com eficiências de até 11% vêm sendo preparadas empregando complexos de Ru(II) como sensibilizadores.14 Apesar de eficientes, os complexos de Ru(II) exigem etapas de síntese e purificação, e por isso respondem por grande parte do custo final do dispositivo. Para a preparação dos fotoanodos, filmes de TiO 2 , obtidos a partir da rota sol-gel, 41 foram depositados por meio da técnica painting sobre vidros recobertos com uma camada condutora de óxido de estanho dopado com fluoreto, FTO (R = 10 W/, Pilkington). Após a deposição, os filmes foram secos à temperatura ambiente e sinterizados a 450 ºC por 30 min. Em seguida, foram imersos em uma solução etanólica saturada de N3, ou nos extratos aquosos das frutas já mencionadas. Células fotoeletroquímicas com 0,5 cm 2 de área ativa foram montadas com o fotoanodo e um contraeletrodo numa disposição tipo sanduíche. Como contraeletrodo, utilizou-se outro substrato condutor FTO recoberto com uma fina camada de platina. Como mediador, utilizou-se uma solução de I 3 -/I -(0,03/0,3 mol L -1

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Metal complex sensitizers in dye-sensitized solar cells

Cited by 508 publications

References 121 publications

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Dye Solar Cells: Basic and Photon Management Strategies

Em busca da sustentabilidade: células solares sensibilizadas por extratos naturais

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