Rice-like brookite titania as an efficient scattering layer for nanosized anatase titania film-based dye-sensitized solar cells

Xu, Jinlei; Li, Kan; Shi, Wenye; Li, Renjie; Peng, Tianyou

doi:10.1016/j.jpowsour.2014.02.092

Cited by 47 publications

(36 citation statements)

References 33 publications

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“…Rutile phase is the most thermally stable among the three phases. Brookite and anatase crystalline, above 600°C, experience a phase transition and convert into the rutile phase [28, 29]. The anatase phase contains zigzag chains of octahedral molecules linked to each other, while the rutile consists of linear chains of opposite edge-shared octahedral structure [29–32].…”

Section: Tio2: In Generalmentioning

confidence: 99%

“…Brookite and anatase crystalline, above 600°C, experience a phase transition and convert into the rutile phase [28, 29]. The anatase phase contains zigzag chains of octahedral molecules linked to each other, while the rutile consists of linear chains of opposite edge-shared octahedral structure [29–32]. Generally, the anatase-to-rutile phase transformation occurs between 600–700°C, but, for certain applications, it is required that TiO 2 anatase be stable at 900°C [31].…”

Section: Tio2: In Generalmentioning

confidence: 99%

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Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Bagheri

Julkapli

Hamid

2014

The Scientific World Journal

337

176

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The lack of stability is a challenge for most heterogeneous catalysts. During operations, the agglomeration of particles may block the active sites of the catalyst, which is believed to contribute to its instability. Recently, titanium oxide (TiO 2 ) was introduced as an alternative support material for heterogeneous catalyst due to the effect of its high surface area stabilizing the catalysts in its mesoporous structure. TiO 2 supported metal catalysts have attracted interest due to TiO 2 nanoparticles high activity for various reduction and oxidation reactions at low pressures and temperatures. Furthermore, TiO 2 was found to be a good metal oxide catalyst support due to the strong metal support interaction, chemical stability, and acid-base property. The aforementioned properties make heterogeneous TiO 2 supported catalysts show a high potential in photocatalyst-related applications, electrodes for wet solar cells, synthesis of fine chemicals, and others. This review focuses on TiO 2 as a support material for heterogeneous catalysts and its potential applications.

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Section: Tio2: In Generalmentioning

confidence: 99%

Section: Tio2: In Generalmentioning

confidence: 99%

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Bagheri

Julkapli

Hamid

2014

The Scientific World Journal

337

176

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“…The light intensity was determined using a reference monocrystalline silicon cell system (Oriel, U. S. A). 19,20 Although it is a common sense that brookite TiO 2 is a thermodynamically instable phase, the present product still maintains the brookite phase even aer calcination at 500 C, conrming its good thermal stability. The active area was 0.16 cm 2 .…”

Section: Solar Cell Performance Measurementmentioning

confidence: 91%

Composite electrode of TiO₂ particles with different crystal phases and morphology to significantly improve the performance of dye-sensitized solar cells

Jin

Ying

et al. 2015

RSC Adv.

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A novel composite electrode containing brookite TiO 2 quasi nanocubes and anatase TiO 2 sea urchin-like microspheres is fabricated for improving the dye-sensitized solar cell's performance. The brookite nanocubes have a mean size of $50 nm, and the anatase microspheres with $3 mm diameter display hierarchical structures composed of secondary TiO 2 nanoribbons and nanoparticles. An optimal efficiency of 7.09% is obtained from the solar cell fabricated with a composite TiO 2 electrode containing 30 wt% nanocubes and 70 wt% microspheres, with 81% or 30% improvement in the efficiency as compared to the single nanocube or microsphere film-based cell. Those brookite nanocubes in the microsphere film can fill the interspaces of the hierarchical microspheres, which can not only enhance the dye-loading, but also reduce the charge recombination. All these lead to a higher voltage and current, leading to the improved performance of the anatase TiO 2 film-based solar cell.

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“…Although conventional mesoporous photoanodes containing 20 nm TiO 2 nanoparticles enjoy high dyeloading ability, they suffer from such impediments as weak light scattering, as a result of limited light harvesting of TiO 2 nanocrystalline film. In order to improve the power conversion efficiency of DSSCs, a broad spectrum of research focused on the improvement of the light scattering of the photoanode [2][3][4][5][6][7]. TiO 2 spheres have rapidly raised interest because they extend the optical path length, enhancing the light harvesting ability of dye molecules [8].…”

Section: Introductionmentioning

confidence: 99%

Multi-layered architecture of electrodes containing uniform TiO2 aggregates layers for improving the light scattering efficiency of dye-sensitized solar cells

Bakhshayesh¹,

Azadfar²,

Bakhshayesh³

2015

J Mater Sci: Mater Electron

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This study comes up with a new architecture of multi-layered photoanode electrodes containing two thick layers (i.e., 6 lm) of nanocrystalline TiO 2 particles and two thin layers (i.e., 1 lm) of uniform TiO 2 aggregates, which are alternately deposited. The aggregates layers are deposited by a straightforward gel process, developed for the preparation of uniform and sponge-like light scattering layer for dye-sensitized solar cells (DSSCs) applications. The aggregates layers are composed of uniform spherical particles with average diameter of 2 lm, containing small nanoparticles with the average grain size of 20 nm. The nanocrystalline layers contain 20-nm-diameter TiO 2 nanoparticles. X-ray diffraction reveals that the nanocrystalline layers have a pure anatase phase, whereas the aggregates layers show a mixture of anatase and rutile phases. Diffuse reflectance spectroscopy demonstrates that the multi-layered electrode enjoys better light scattering ability than that of mono-layered electrode due to the incorporation of a thin light scattering layer into the nanocrystalline film. The multi-layered DSSC shows the highest power conversion efficiency of 7.69 % as a result of higher light harvesting and less recombination which is demonstrated by electrochemical impedance spectroscopy. From IPCE measurement, the external quantum efficiency of the multi-layered cell is equal 88 %, which is higher than that of mono-layered cell (i.e., 78 %).

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Rice-like brookite titania as an efficient scattering layer for nanosized anatase titania film-based dye-sensitized solar cells

Cited by 47 publications

References 33 publications

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Composite electrode of TiO₂ particles with different crystal phases and morphology to significantly improve the performance of dye-sensitized solar cells

Multi-layered architecture of electrodes containing uniform TiO2 aggregates layers for improving the light scattering efficiency of dye-sensitized solar cells

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Rice-like brookite titania as an efficient scattering layer for nanosized anatase titania film-based dye-sensitized solar cells

Cited by 47 publications

References 33 publications

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Composite electrode of TiO2 particles with different crystal phases and morphology to significantly improve the performance of dye-sensitized solar cells

Multi-layered architecture of electrodes containing uniform TiO2 aggregates layers for improving the light scattering efficiency of dye-sensitized solar cells

Contact Info

Product

Resources

About

Composite electrode of TiO₂ particles with different crystal phases and morphology to significantly improve the performance of dye-sensitized solar cells