Dye-sensitized solar cells: Effect of Ar/O2 gas-flow ratio on the structural and morphological properties of facing-target sputter-deposited TiO2 electrode

2010 ◽  
Vol 28 (5) ◽  
pp. 1269-1274 ◽  
Author(s):  
M. F. Hossain ◽  
T. Takahashi
Keyword(s):  
Solar Cells ◽  
Gas Flow ◽  
Dye Sensitized Solar Cells ◽  
Morphological Properties ◽  
Tio2 Electrode ◽  
Flow Ratio ◽  
Dye Sensitized ◽  
Gas Flow Ratio ◽  
Sputter Deposited ◽  
Sensitized Solar Cells

scholarly journals In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

Molecules ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 198 ◽  
Author(s):  
Michèle Chevrier ◽  
Alberto Fattori ◽  
Laurent Lasser ◽  
Clément Kotras ◽  
Clémence Rose ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Density Functional ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Hole Transport ◽  
Tio2 Electrode ◽  
Dye Sensitized ◽  
Depth Analysis ◽  
Sensitized Solar Cells

Chlorophyll a derivatives were integrated in “all solid-state” dye sensitized solar cells (DSSCs) with a mesoporous TiO2 electrode and 2′,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene as the hole-transport material. Despite modest power conversion efficiencies (PCEs) between 0.26% and 0.55% achieved for these chlorin dyes, a systematic investigation was carried out in order to elucidate their main limitations. To provide a comprehensive understanding of the parameters (structure, nature of the anchoring group, adsorption …) and their relationship with the PCEs, density functional theory (DFT) calculations, optical and photovoltaic studies and electron paramagnetic resonance analysis exploiting the 4-carboxy-TEMPO spin probe were combined. The recombination kinetics, the frontier molecular orbitals of these DSSCs and the adsorption efficiency onto the TiO2 surface were found to be the key parameters that govern their photovoltaic response.

TiO2 Film Morphology, Electron Transport and Electron Lifetime in Ultra-fast Sintered Dye-sensitized Solar Cells

2013 ◽  
Vol 1493 ◽  
pp. 121-126
Author(s):  
Matthew J. Carnie ◽  
Cecile Charbonneau ◽  
Matthew Davies ◽  
Ian Mabbett ◽  
Trystan Watson ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solar Cells ◽  
Electron Transport ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Rutile Phase ◽  
Morphological Properties ◽  
Electron Lifetime ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ABSTRACTWith the application of near-infrared radiation (NIR), TiO2 films for dye-sensitized solar cells (DSCs) on metallic substrates can be sintered in just 12.5 s. The photovoltaic performance of devices made with NIR sintered films match those devices made with conventionally sintered films prepared by heating for 1800 s. Here we characterise the electron transport, electron lifetime and phase-morphological properties of ultrafast NIR sintered films, using impedance spectroscopy, transient photovoltage decay and x-ray diffraction measurements. An important factor in NIR processing of TiO2 films is the peak metal temperature (PMT) and we show that during the 12.5 second heat treatment that a PMT of around 635 °C gives near identical electron transport, electron lifetime and morphological properties, as well comparable photovoltaic performance to a conventionally sintered (500 °C, 30 mins) film. What is perhaps most interesting is that the rapid heating of the TiO2 (to temperatures of up to 785°C) does not lead to a large scale rutile phase transition. As such photovoltaic performance of resultant DSC devices is maintained even though the TiO2 has been at temperatures which traditionally would have reduced cell photocurrents via anatase-to-rutile phase transition.

Low-temperature fabrication of flexible TiO2 electrode for dye-sensitized solar cells

2010 ◽  
Vol 207 (9) ◽  
pp. 2201-2206 ◽  
Author(s):  
Qinghui Zeng ◽  
Yuan Yu ◽  
Liangzhuan Wu ◽  
Bin Qi ◽  
Jinfang Zhi
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Electrode ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Al-doped TiO2 Photoanode for Dye-Sensitized Solar Cells

2011 ◽  
Vol 64 (6) ◽  
pp. 820 ◽  
Author(s):  
Fuzhi Huang ◽  
Yi-Bing Cheng ◽  
Rachel A. Caruso
Keyword(s):  
Solar Cells ◽  
Doping Concentration ◽  
Sol Gel ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Tio2 Electrode ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
A Cell ◽  
Sensitized Solar Cells

Porous aluminium doped TiO2 was prepared through a sol–gel process in the presence of a template. The doping enlarges the band-gap of the anatase TiO2, which modifies the TiO2 electrical properties. The porous Al/TiO2 films were assembled into dye-sensitized solar cells. A 45 mV enhancement of open-circuit photovoltage and 11% increase of fill factor at 2 wt-% doping concentration, and 8.6% improvement of the overall efficiency at 0.5 wt-% doping concentration were achieved relative to that of a cell containing non-doped TiO2 under the same conditions. This advance is attributed to the increase in conductivity with the Al-doping of the TiO2 electrode.

Enhancement in Photovoltaic Performance of Dye Sensitized Solar Cells Using Cu and Cu:Ag Co-Doped TiO2 Photoanode

2016 ◽  
Author(s):  
Sehar Shakir ◽  
Hafiz M. Abd-ur-Rehman
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
Tio2 Electrode ◽  
Doped Tio2 ◽  
Undoped Tio2 ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Co Doped

Dye Sensitized Solar Cells (DSSCs) are low cost solar cells offering big room for improvements in its photovoltaic performance by maneuvering semiconductor properties, dye adsorption, electrolyte stability etc. For the first time, we have co-doped TiO2 with silver (Ag) and copper (Cu) to enhance both charge collection and light absorption as well as reduce recombinations for DSSCs. For high solar cell efficiency 3wt% Cu and 3wt% Cu:Ag doped TiO2 nps were successfully prepared for Dye Sensitized Solar Cells (DSSCs). Modified photoanode was prepared using surface adsorbed N719 dye on doctor blade coated TiO2, Cu:TiO2 and Cu:Ag:TiO2 thin films. It was observed that optimum doping concentration of Cu and silver was 3wt% each. DSSCs with Cu:Ag:TiO2 thin film showed higher conversion efficiency under full sunlight illumination when compared to DSSCs assembled using Cu:TiO2 and undoped TiO2. The obtained efficiencies for DSSCs with undoped TiO2, Cu:TiO2 and Cu:Ag:TiO2 photoanodes were 2%, 2.7% and 4.5% respectively. Solar cells assembled with Cu only doped TiO2 electrode when compared with cells assembled using pristine TiO2, showed an increase in Voc while Jsc was decreased Furthermore, cells doped with both Ag and Cu showed enhancement in both Voc and Jsc. The enhancement in cell performance has been discussed in context of morphology, crystal phase, presence of bonds etc. in nanoparticles. Considering overall better performance, Cu:Ag doped TiO2 photoanodes can be considered as potential photoanodes in DSSCs.

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