Evaluation Methods of Energy-Storable Dye-Sensitized Solar Cells

2010 ◽  
Vol 658 ◽  
pp. 507-510
Author(s):  
Yosuke Saito ◽  
Kentaro Iwata ◽  
Satoshi Uchida ◽  
Takaya Kubo ◽  
Hiroshi Segawa
Keyword(s):  
Output Power ◽  
Dye Sensitized Solar Cells ◽  
Evaluation Methods ◽  
Electrode System ◽  
Solar Irradiation ◽  
Rechargeable Battery ◽  
Low Light ◽  
Dye Sensitized ◽  
A Charge ◽  
Sensitized Solar Cells

Energy-storable dye-sensitized solar cell (ES-DSSC), which possesses a unique three-electrode system composed of a photoanode, a counter electrode and a charge-storage electrode, is a practical solar rechargeable battery. The ES-DSSC is able to yield output power even in the dark after photocharging and suppress the fluctuation of the output power under the capricious solar irradiation. In this study, the evaluation methods of the ES-DSSC performances were investigated toward their practical use under various illumination conditions. The ES-DSSCs were found to be able to work even under low light intensity. Unlike conventional DSSC array, the ES-DSSC array coupled in a series connection gave a stable output voltage when one of the cells or both cells were shadowed.

Flexible dye-sensitized solar cells based on Ti/TiO 2 nanotubes photoanode and Pt-free and TCO-free counter electrode system

2017 ◽  
Vol 302 ◽  
pp. 192-196 ◽  
Author(s):  
M. Klein ◽  
M. Szkoda ◽  
M. Sawczak ◽  
A. Cenian ◽  
A. Lisowska-Oleksiak ◽  
...  
Keyword(s):  
Solar Cells ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Electrode System ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Effect of Eu3+ - dopant concentration on structural and luminescence properties of SrY2O4 nanocrystalline phosphor and potential application in dye-sensitized solar cells

2018 ◽  
Vol 50 (3) ◽  
pp. 347-355 ◽  
Author(s):  
Vesna Lojpur ◽  
Stevan Stojadinovic ◽  
Miodrag Mitric
Keyword(s):  
Solar Cell ◽  
Dye Sensitized Solar Cells ◽  
Emission Spectra ◽  
Combustion Method ◽  
X Ray Diffraction ◽  
Low Light ◽  
Dye Sensitized ◽  
Pure Phase ◽  
Xrd Patterns ◽  
Sensitized Solar Cells

SrY2O4 phosphors were doped with different concentrations of Eu3+ (0.5, 1, 2, 4, 8 and 10 at %) in order to investigate the maximal doping concentration of Eu3+ and its implementation in solar cell devices. Samples were synthesized by a combustion method using citric acid and glycine as a fuel. The X-ray diffraction (XRD) patterns confirmed pure phase of SrY2O4. FE-SEM micrographs showed agglomerate phenomenon with spherical-like shape particles and diameter of about 50 nm. Upon excitation with 280 nm, emission spectra were recorded in the range from 450-750 nm and in all samples the same energy transitions were observed 5D0 ? 7FJ (J = 1, 2, 3 and 4) with maximal intensity for sample with 8 at % of Eu3+. That sample was further examined for the purpose of application in solar cell devices and showed high value of efficiency at low light intensities.

scholarly journals Super Broadband-Sensitive Upconversion in Tm and Ni Codoped Perovskites

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Hom Nath Luitel ◽  
Shintaro Mizuno ◽  
Yasuhiko Takeda
Keyword(s):  
Solar Cells ◽  
Transition Probabilities ◽  
Optical Transition ◽  
Dye Sensitized Solar Cells ◽  
Charge Balance ◽  
Alkali Ions ◽  
Dye Sensitized ◽  
A Charge ◽  
Sensitized Solar Cells ◽  
Balance Mechanism

We investigated broadband-sensitive upconversion (UC) processes in a series of Tm- and Ni-sensitized ABO3 (A = Ca/Sr/Ba and B = Ti/Zr/Hf) perovskites. We have designed combinations of the sensitizers and host cations such that super broad solar radiation ranging from 900 nm to nearly 2000 nm can be efficiently upconverted to 800 nm and shorter wavelengths. The Ni2+ ions located at the center of O2− octahedra absorbed photons in the 900–1500 nm range and transferred those energies to the nearby Tm3+ ions. The Tm3+ ions upconverted those energies at 800 nm, along with the energies absorbed by themselves in the 1100–1250 and 1550–2000 nm ranges, exhibiting super broadband sensitivity. Among the ABO3:Tm, Ni (A = Ca/Sr/Ba and B = Ti/Zr/Hf) upconverters, CaTiO3:Tm, Ni exhibited the best performance due to its most distorted crystal structure, which intensified the emission and absorption extents by increasing the optical transition probabilities of Tm3+ and Ni2+ ions. Introduction of alkali ions at the Ca2+ sites and Nb5+ ions at the Ti4+ sites intensified the UC emission by many folds, mainly due to a charge balance mechanism. At the same time, bigger and smaller codoped alkali ions created an asymmetric crystal field around the active ions and further enhanced the UC emission. Importantly, the upconverted photons are within the absorption edges of GaAs, Cu2ZnSnS4, and dye-sensitized solar cells making wider applications of these upconverters besides crystalline Si solar cells.

scholarly journals Photovoltaic Performance of ZnO Nanorod and ZnO : CdO Nanocomposite Layers in Dye-Sensitized Solar Cells (DSSCs)

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Sule Erten-Ela
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Solar Irradiation ◽  
Design Stage ◽  
Zno Nanorod ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Organic Sensitizer

Triphenylene diamine sensitizer comprising donor, electron conducting, and anchoring group is synthesized for a potential application in dye-sensitized solar cells. Absorption spectrum, electrochemical and photovoltaic properties of triphenylene diamine have been investigated. Two different electrodes are used for dye-sensitized solar cells. The performances of ZnO nanorod electrodes are compared to ZnO : CdO nanocomposite electrode. Also, the theoretical calculations for HOMO and LUMO orbitals are used to estimate the photovoltaic properties of organic sensitizer in the design stage. ZnO : CdO nanocomposite electrode-based dye-sensitized solar cell sensitized with organic sensitizer exhibits higher efficiencies than ZnO nanorod electrode. For a typical device, a solar energy conversion efficiency (η) of 0.80 based on ZnO : CdO nanocomposite is achieved under simulated AM 1.5 solar irradiation (100 mW cm−2) with a short circuit photocurrent density (Jsc) of 3.10 mA/cm2, an open-circuit voltage (Voc) of 480 mV, and a fill factor (FF) of 0.57. These results suggest that the ZnO : CdO nanocomposite system is a good selection and a promising candidate for electrode system in dye-sensitized solar cells.

scholarly journals A new porphyrin sensitizer with phenolic binding group for high efficiency dye-sensitized solar cells

2014 ◽  
Vol 32 (4) ◽  
pp. 610-616 ◽  
Author(s):  
Liguo Jin ◽  
Hongjie Wang ◽  
Shuo Wang ◽  
Liping Wen ◽  
Jin Zhai ◽  
...  
Keyword(s):  
High Efficiency ◽  
High Current Density ◽  
Dye Sensitized Solar Cells ◽  
Excited Singlet ◽  
Nanocrystalline Tio2 ◽  
Dye Sensitized ◽  
Cyclic Voltammetry Measurement ◽  
Phenolic Group ◽  
A Charge ◽  
Sensitized Solar Cells

AbstractA novel zinc porphyrin (5,10,15-tri-dodecoxyphenyl-20-(4-hydroxyphenyl-azo-benzenyl)-porphyrinatozinc (tdhab-ZnP)) with benzenyl-azo-phenolic group, able to adsorb on the nanocrystalline-TiO2 film, has been synthesized. We constructed a dye-sensitized solar cell based on the nanocrystalline-TiO2 hierarchical structure film, with a power conversion efficiency of 4.15 % and a high current density of 14 mA/cm2 under AM 1.5 irradiation. UV-Vis absorption spectra measurements indicated that the tdhab-ZnP molecules formed a charge transfer complex with TiO2 nanoparticles (NPs) through the phenolic group. Cyclic voltammetry measurement showed that the charge separation resulting from the tdhab-ZnP excited singlet state to the conduction band (CB) of TiO2 and charge shifting from the I−/I3− couple to the porphyrin radical cation were thermodynamically feasible.

Efficiency of 10 % for quasi-solid state dye-sensitized solar cells under low light irradiance

2015 ◽  
Vol 45 (4) ◽  
pp. 289-298 ◽  
Author(s):  
T. M. W. J. Bandara ◽  
W. J. M. J. S. R. Jayasundara ◽  
H. D. N. S. Fernado ◽  
M. A. K. L. Dissanayake ◽  
L. A. A. De Silva ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Dye Sensitized Solar Cells ◽  
Low Light ◽  
Light Irradiance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Nanostructured Semiconductor Materials for Dye-Sensitized Solar Cells

2017 ◽  
Vol 2017 ◽  
pp. 1-31 ◽  
Author(s):  
Carmen Cavallo ◽  
Francesco Di Pascasio ◽  
Alessandro Latini ◽  
Matteo Bonomo ◽  
Danilo Dini
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Low Light ◽  
Small Power ◽  
Dye Sensitized ◽  
History Of ◽  
Silicon Based ◽  
Nanostructured Semiconductor ◽  
Sensitized Solar Cells

Since O’Regan and Grätzel’s first report in 1991, dye-sensitized solar cells (DSSCs) appeared immediately as a promising low-cost photovoltaic technology. In fact, though being far less efficient than conventional silicon-based photovoltaics (being the maximum, lab scale prototype reported efficiency around 13%), the simple design of the device and the absence of the strict and expensive manufacturing processes needed for conventional photovoltaics make them attractive in small-power applications especially in low-light conditions, where they outperform their silicon counterparts. Nanomaterials are at the very heart of DSSC, as the success of its design is due to the use of nanostructures at both the anode and the cathode. In this review, we present the state of the art for bothn-type andp-type semiconductors used in the photoelectrodes of DSSCs, showing the evolution of the materials during the 25 years of history of this kind of devices. In the case ofp-type semiconductors, also some other energy conversion applications are touched upon.

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