Effects of TiO2 nanoparticle polymorphism on dye-sensitized solar cell photovoltaic properties

Magne, Constance; Dufour, Frédéric; Labat, Frédèric; Lancel, Gilles; Durupthy, Olivier; Cassaignon, Sophie; Pauporté, Th.

doi:10.1016/j.jphotochem.2012.01.015

Cited by 73 publications

(97 citation statements)

References 41 publications

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“…, versus the energy of the exciting light [15] considering brookite as an indirect semiconductor [16][17][18][19][20][21][22][23][24]. Direct band gap values have been also obtained [3,5,16,17,25].…”

Section: Electronic Propertiesmentioning

confidence: 94%

“…Thin films were so obtained by coating stable sols of pure brookite separated from mixtures of brookite and rutile by peptization with HNO 3 [21,58], or by repeated washings with water [110][111][112]. Magne et al [22,113] prepared pure brookite porous films using a viscous paste created by mixing ethyl cellulose powder dissolved in ethanol and brookite particles obtained from mixtures of brookite and rutile or by cohydrolysis of TiCl 3 and TiCl 4 .…”

Section: Brookite Filmsmentioning

confidence: 99%

“…Mesoporous brookite films containing a certain amount of anatase were used as electrodes for dye-sensitized solar cells [103]. Magne et al [22] prepared efficient cells employing porous layers of pure brookite. The comparison between anatase and brookite based-cell revealed that the latter phase is very interesting for this kind of applications [22].…”

Section: Pure Brookitementioning

confidence: 99%

“…Magne et al [22] prepared efficient cells employing porous layers of pure brookite. The comparison between anatase and brookite based-cell revealed that the latter phase is very interesting for this kind of applications [22].…”

Section: Pure Brookitementioning

confidence: 99%

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Brookite, the Least Known TiO2 Photocatalyst

2013

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Abstract:Brookite is the least studied TiO 2 photocatalyst due to the difficulties usually encountered in order to obtain it as a pure phase. In this review, a comprehensive survey of the different methods available for preparing brookite powders and films is reported. Attention has been paid both to the most traditional methods, such as hydrothermal processes at high temperatures and pressures, and to environmentally benign syntheses using water soluble compounds and water as the solvent. Papers reporting the photocatalytic activity of pure and brookite-based samples have been reviewed.

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Section: Electronic Propertiesmentioning

confidence: 94%

Section: Brookite Filmsmentioning

confidence: 99%

Section: Pure Brookitementioning

confidence: 99%

Section: Pure Brookitementioning

confidence: 99%

See 2 more Smart Citations

Brookite, the Least Known TiO2 Photocatalyst

2013

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“…However, the CO 2 reduction performance of R@PDA-1 nm and B@PDA-1 nm is worse than the pure TiO 2 phases ( Figures S3 and S4). It might be due to the mismatch of the excited state of PDA with the CB edge of rutile and brookite [39][40][41].…”

Section: Physical and Optical Propertiesmentioning

confidence: 99%

The Pros and Cons of Polydopamine-Sensitized Titanium Oxide for the Photoreduction of CO2

2018

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Photocatalytic reduction of CO 2 into fuels is a promising route to reduce greenhouse gas emission, and it demands high-performance photocatalysts that can use visible light in the solar spectrum. Due to its broadband light adsorption, polydopamine (PDA) is considered as a promising photo-sensitization material for semiconductor photocatalysts. In this work, titanium oxides have been coated with PDA through an in-situ oxidation polymerization method to pursue CO 2 reduction under visible light. We have shown that the surface coated PDA with a thickness of around 1 nm can enhance the photocatalytic performance of anatase under visible light to reduce CO 2 into CO. Assisted with additional UV-vis adsorption and photoluminescence characterizations, we confirmed the sensitization effect of PDA on anatase. Furthermore, our study shows that thicker PDA coating might not be favorable, as PDA could decompose under both visible and UV-vis light irradiations. 13 C solid-state nuclear magnetic resonance showed structural differences between thin and thick PDA coatings and revealed compositional changes of PDA after light irradiation.

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Response Enhancement of Self‐Powered Visible‐Blind UV Photodetectors by Nanostructured Heterointerface Engineering

Zhu

Alvarez

et al. 2019

Adv Funct Materials

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The development of efficient photodetectors (PDs) for ultraviolet (UV) light is of great importance for many applications. In the present paper, we propose a novel approach for boosting the performances of self-powered PDs. Visible-blind UV-A PDs have been built by combining a mesoporous TiO2 layer with a Spiro-OMeTAD layer. The nanostructured heterointerface has been engineered by inserting a self-assembled layer of organic modifiers. By choosing the 4-nitrobenzoic acid (NBA), the responsivity has been boosted by 70% compared to the pristine devices. It achieved 64 mA/W at 0 V bias, 380 nm and 1 mW.cm-2. The PD displayed a very high sensitivity (> 10 4), a fast response time (< 3ms), a high stability and repeatability. 4-chlorobenzoic acid, 4-methoxy benzoic acid, 4-nitro benzoic acid and βalanine surface modifier have been studied by a combined experimental and theoretical approach. Their dipole moment has been calculated. Their presence induces a step in the Received: ((will be filled in by the editorial staff)) Revised: ((will be filled in by the editorial staff))

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Effects of TiO2 nanoparticle polymorphism on dye-sensitized solar cell photovoltaic properties

Cited by 73 publications

References 41 publications

Brookite, the Least Known TiO2 Photocatalyst

Brookite, the Least Known TiO2 Photocatalyst

The Pros and Cons of Polydopamine-Sensitized Titanium Oxide for the Photoreduction of CO2

Response Enhancement of Self‐Powered Visible‐Blind UV Photodetectors by Nanostructured Heterointerface Engineering

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