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KW - dye-sensitized solar cells

T1 - Thieno[3,4-b]thiophene-based organic dyes for dye-sensitized solar cells

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Dye-sensitized solar cells with inkjet-printed ..

N2 - A nanostructured NiO electrode was synthesized through an initial deposition of layered basic nickel acetate having a yarn-ball-shaped morphology and subsequent heat-treatment at 500°C in oxygen. A sandwich-type open cell using a NiO/C343 photocathode yielded a photocurrent density of 1.61 mA cm-2, an open-circuit photovoltage of 113 mV, a fill factor of 0.31, and a solar energy conversion efficiency of 0.057%, reaching the highest level ever reported. A tandem solar cell was also produced together with a TiO2 /N719 photoanode, which resulted in an increase of the open-circuit photovoltage to 0.80 V.

Thieno[3,4-b]thiophene-based organic dyes for dye-sensitized solar cells

AB - A nanostructured NiO electrode was synthesized through an initial deposition of layered basic nickel acetate having a yarn-ball-shaped morphology and subsequent heat-treatment at 500°C in oxygen. A sandwich-type open cell using a NiO/C343 photocathode yielded a photocurrent density of 1.61 mA cm-2, an open-circuit photovoltage of 113 mV, a fill factor of 0.31, and a solar energy conversion efficiency of 0.057%, reaching the highest level ever reported. A tandem solar cell was also produced together with a TiO2 /N719 photoanode, which resulted in an increase of the open-circuit photovoltage to 0.80 V.

Efficient dye-sensitised solar cell based ..

Spindle-like TiO 2 with high crystallinity and its application in dye sensitised solar cell ..

Biography:
Dr. Naoufel Khemiri is an Assistant Professor at El Manar Preparatory Engineering Institute in Tunisia. He obtained his Ph.D thesis in “Condensed Matter Physics” from the Faculty of Sciences of Tunis (FST), University of Tunis El Manar, Tunisia in 2012. He is now member of Photovoltaic and Semiconductor Materials Laboratory (ENIT, Tunis, Tunisia). He works mainly on the synthesis and the characterization of ternary and quaternary compounds (CuInS2, Zn(S,O), SnSb4S7, Cu2ZnSnS4 and Cu2ZnxFe1-xSnS4) for opto-electronic and solar cell applications. He published more than 20 papers in International Journals with impact factor and participated in several international conferences in materials science.

Biography:
Dr. Naoufel Khemiri is an Assistant Professor at El Manar Preparatory Engineering Institute in Tunisia. He obtained his Ph.D thesis in “Condensed Matter Physics” from the Faculty of Sciences of Tunis (FST), University of Tunis El Manar, Tunisia in 2012. He is now member of Photovoltaic and Semiconductor Materials Laboratory (ENIT, Tunis, Tunisia). He works mainly on the synthesis and the characterization of ternary and quaternary compounds (CuInS2, Zn(S,O), SnSb4S7, Cu2ZnSnS4 and Cu2ZnxFe1-xSnS4) for opto-electronic and solar cell applications. He published more than 20 papers in International Journals with impact factor and participated in several international conferences in materials science.

Efficient dye-sensitised solar cell based on uniform In-doped ..

TiO₂ nanotube based dye-sensitised solar cells

Abstract:
The study of semiconductor nanocrystals (NCs) is a very active research field, due to the wide range of applications, related to light-emission and absorption, photodetection, solar cells, light emitting diode or tunable emitters for bio-labeling1. One area is the development of detection techniques with high spatial resolution enabled by the small size of nanomaterials. As a representative example, nanometer probes of temperature can be very useful to obtain an accurate local value of temperature, particularly in catalysis where the activity and selectivity are temperature dependent. The key is to obtain the value of the local temperature inside the solution or inside the solid at the surface of the reactants. Certain catalytic reactions require high temperatures to occur so another challenge is to build a high local temperature probe (> 373 K). In this context, semiconductor NCs are promising objects to provide this precision due to the temperature dependence of their optical properties. We present here the synthesis of different types of NCs (Cd3P22, InP@ZnS3 and CdSe@CdS4), their capacities as nanothermometers for high temperatures (>340 K) and the conditions which have to be fullfilled for accurate measurements. Different parameters such as the wavelength, the intensity, the area and the full width at half maximum of emission were studied as a function of temperature. The studied temperatures ranges from room temperature to 540 K and the comparison between the different NCs is discussed.

Ultraviolet-visible (UVvis)absorbance spectra showed that the dye-adsorption ability of the nanotubes are enhanced by the Al₂O₃ coating and hence is a viable material for solar cell application.

Dye-sensitised solar cells with iodine ..
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  • Dye-sensitised solar cells with iodine-free discotic electrolytes.

    A dye-sensitized solar cell based ..

  • the research on dye-sensitized solar cells is focused ..

    in the fields of dye synthesised and polymeric solar cells in order to produce ..

  • Plasmonic Enhancement of Dye Sensitized Solar Cells …

    Dye synthesised solar cell 14

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Solar cells based on synthesized nanocrystalline ZnO

Biography:
Assunta Marrocchi is currently Associate Professor at the Department of Chemistry, Biology and Biotechnology of the University of Perugia. She earned a PhD in Chemical Sciences at the same Institution. In 2008 she conducted research at Northwestern University, Evanston, IL (USA), as visiting scientist. Her research expertise and interests encompass the fields of 1) organic functional materials, with a special emphasis on the sustainable synthesis of photoactive organics for solar cells; 2) biomass sustainable conversion to high added value chemicals.

Solar cells based on synthesized nanocrystalline ..

AB - New dipolar sensitizers containing an ethyl thieno[3,4-b]thiophene-2- carboxylate (ETTC) entity in the conjugated spacer have been synthesized in two isomeric forms. These compounds were used as the sensitizers of n-type dye-sensitized solar cells (DSSCs). The best conversion efficiency (5.31 %) reaches approximately 70 % of the N719-based (7.41 %) DSSC fabricated and measured under similar conditions. The ETTC-containing compounds exhibit a bathochromic shift of the absorption compared to their thiophene congeners due to the quinoid effect, however, charge-trapping at the ester group of ETTC was found to jeopardize the electron injection and lower the cell efficiency. Charge trapping is alleviated as the ester group of ETTC is replaced with a hydrogen atom, as evidenced from the theoretical computation.

Solar cells based on synthesized nanocrystalline ZnO thin ..

N2 - New dipolar sensitizers containing an ethyl thieno[3,4-b]thiophene-2- carboxylate (ETTC) entity in the conjugated spacer have been synthesized in two isomeric forms. These compounds were used as the sensitizers of n-type dye-sensitized solar cells (DSSCs). The best conversion efficiency (5.31 %) reaches approximately 70 % of the N719-based (7.41 %) DSSC fabricated and measured under similar conditions. The ETTC-containing compounds exhibit a bathochromic shift of the absorption compared to their thiophene congeners due to the quinoid effect, however, charge-trapping at the ester group of ETTC was found to jeopardize the electron injection and lower the cell efficiency. Charge trapping is alleviated as the ester group of ETTC is replaced with a hydrogen atom, as evidenced from the theoretical computation.

Porphyrins as light harvesters in the dye-sensitised TiO 2 solar cell

New dipolar sensitizers containing an ethyl thieno[3,4-b]thiophene-2- carboxylate (ETTC) entity in the conjugated spacer have been synthesized in two isomeric forms. These compounds were used as the sensitizers of n-type dye-sensitized solar cells (DSSCs). The best conversion efficiency (5.31 %) reaches approximately 70 % of the N719-based (7.41 %) DSSC fabricated and measured under similar conditions. The ETTC-containing compounds exhibit a bathochromic shift of the absorption compared to their thiophene congeners due to the quinoid effect, however, charge-trapping at the ester group of ETTC was found to jeopardize the electron injection and lower the cell efficiency. Charge trapping is alleviated as the ester group of ETTC is replaced with a hydrogen atom, as evidenced from the theoretical computation.

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