scholarly journals Separation of Functionalized 5,6-Disubstituted-1,10-Phenanthroline for Dye-Sensitized Solar Cell Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Hashem Shahroosvand ◽  
Parisa Abbasi ◽  
Behrouz Notash ◽  
Leyla Najafi
Keyword(s):  
Dye Sensitized Solar Cells ◽  
P System ◽  
Monoclinic Space Group ◽  
Single Crystal Diffraction ◽  
H Nmr ◽  
Dye Sensitized ◽  
Ft Ir ◽  
End Capping ◽  
Sensitized Solar Cells ◽  
Phenanthroline Ligands

5,6-Epoxy-1,10-phenanthroline is used as a convenient starting material for 5-hydroxy-6-Aryl-1,10-phenanthroline ligands containing carboxylic and sulfonic groups useful for further anchoring of the sensitizer on TiO2for dye-sensitized solar cells (DSCs). Based on the crystal growth of the mixture of products, a convenient separation route for the extension of the p-system on 5,6-disubstituted-1,10-phenanthroline was used to develop a novel series of functionalized 1,10-phenanthroline ligands with electron-withdrawing end-capping group. Also, we report the epoxy opening of 5,6-epoxy-1,10-phenanthroline by aromatic amines stoichiometrically in refluxing water and ethanol in the absence of any catalyst. The dyes were characterized by1H-NMR, FT-IR, UV-Vis, and X-ray single crystal diffraction analyses. It crystallizes in the monoclinic space groupC 2/c,a= 20.920(4) Å,b= 10.340(2) Å,c= 16.187(3) Å,β= 92.30(3)°,V= 3498.6(12) Å3, andZ= 8. The reaction details and features were described in detail.

Solid-State Dye-Sensitized Solar Cells Using Mesoporous TiO2 Films Fabricated with Amphiphilic Rubbery Random Copolymer

2013 ◽  
Vol 853 ◽  
pp. 297-301 ◽  
Author(s):  
Dong Jun Kim ◽  
Sung Hoon Ahn ◽  
Dong Kyu Roh ◽  
Jong Hak Kim
Keyword(s):  
Dye Sensitized Solar Cells ◽  
Random Copolymer ◽  
Grazing Incidence ◽  
Layer By Layer ◽  
H Nmr ◽  
Dye Sensitized ◽  
X Ray Scattering ◽  
Ft Ir ◽  
Sacrificial Agent ◽  
Sensitized Solar Cells

An amphiphilic copolymer, PLMA-POEM, was synthesized with hydrophobic poly (lauryl methacrylate) (PLMA) and hydrophilic poly (oxyethylene methacrylate) (POEM), which is cheap and rubbery state. The copolymers were characterized by using Fourier transform infra-red spectroscopy (FT-IR),1H-nuclear magnetic resonance (1H-NMR) and gel permeation spectroscopy (GPC). The copolymers were used as sacrificial agent to fabricate anatase mesoporous TiO2films and, by varying amounts of TiO2particles, polymer molecular weight (MW), concentration of the copolymers, various mesoporous TiO2films were fabricated. With a low MW polymer, the TiO2formed a worm-like structure with smaller pores, whereas an aggregated honeycomb-like TiO2with bimodal pores was obtained for the high MW system, characterized by scanning electron microscopy (SEM), grazing incidence small-angle X-ray scattering (GI-SAXS) and N2adsorptiondesorption measurement. With 2μm-thick TiO2film, efficiency was 4.2% due to better pore filling of the solid electrolyte and improved light scattering properties. By using a layer-by-layer method, the efficiency was further improved to 5.0% at 7μm thickness.

scholarly journals Fabrication of dye-sensitized solar cells using anthocyanidins from the extracts of Roselle (Hibiscus sabdariffa).

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
I O Abdulsalami
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Dye Sensitized Solar Cells ◽  
Chemical Properties ◽  
Spectroscopic Studies ◽  
Hydroxyl Group ◽  
Dye Sensitized ◽  
Significant Difference ◽  
Ft Ir ◽  
Sensitized Solar Cells

This study extracted, purified and applied the extracts of H. sabdariffa as photo-sensitizers in dye-sensitized solar cells. The chemical properties of the extracts were examined using UV, FT-IR and GC-FID spectroscopic studies. The photoelectrochemical properties of the extracts were also reported. U-V spectra showed significant difference in the absorbance and wavelengths of the crude and purified samples of H. sabdariffa (HSE and HSP respectively). The former has characteristic absorptions of 1.096 at 330 nm and 0.211 at 540 nm, and the latter, 0.211 at 335 nm and 0.334 at 540 nm. Shifts in the wavelengths of the absorption (around 330 – 350 nm) and a characteristic decrease in the absorption between the HSE and HSP were observed. The FT-IR spectra of the HSE and HSP have similar characteristic absorbances peculiar to OH, C=O, C-C double bond (both aliphatic and aromatic) and C-O HSP has two additional absorbances at 2365 cm-1 and 2075cm-1. The spectra of the purified sample have bathochromic (red) shifts on the hydroxyl group and hypsochromic (blue) shifts on the benzene. The GC-FID chromatograms revealed the presence of six anthocyanidins and the spectra data showed the amount of the anthocyanidins in mg per 100 g of the sample. The results showed that delphinidin was in abundance, followed by cyanidin in both samples. The quantities of the delphinidin increased with purity of the samples, while the others decreased with purity for both samples. The photovoltaic performances of HSE and HSP have the fill factors of 0.254 and 0.347 and the overall efficiencies of 0.118% and 0.645% respectively. From these data, the purified sample has higher fill factor and efficiency than the unpurified extract.

Synthesis of TiO2-rGO Nanocomposite and its Application as Photoanode of Dye-Sensitized Solar Cell (DSSC)

2021 ◽  
Vol 1028 ◽  
pp. 151-156
Author(s):  
Ayunita Chintia Celline ◽  
Astria Yuliani Subagja ◽  
Sri Suryaningsih ◽  
Annisa Aprilia ◽  
Lusi Safriani
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Solar Cell ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Reduced Graphene ◽  
Ft Ir ◽  
Sensitized Solar Cells

Dye-sensitized solar cells (DSSC) are solar cells that has a great potential to be applied as renewable energy conversion. The major advantages of DSSC are the ease of fabrication process and low cost of production. Despite of these advantages, the efficiency of DSSC for converting light into electricity is still low. It is due to charge recombination in DSSC which limits the photoanode performance. Numerous efforts has been carried out to increase the efficiency of DSSC, one of which is by adding reduced graphene oxide (rGO) to titanium oxide (TiO2) to obtain TiO2-rGO nanocomposite. In this study, the synthesis of TiO2-rGO nanocomposites was carried out with concentration of rGO are 0.6, 0.8, and 1.0 wt% to amount of TiO2. We have done some characterizations to confirm the result of synthesized TiO2-rGO. UV-Vis measurement shows the addition of rGO has widened the absorption up to 400 nm. The FT-IR spectrum confirms that the rGO peaks appears at wavelength of 1400, 1600, dan 1700 cm-1 which exhibited the vibration C-O, C=C, and C=O stretching from COOH groups, respectively. The highest efficiency of DSSC with photoanode TiO2-rGO nanocomposite is 0.09% which was obtained from 0.8 wt% of rGO.

Comparison of the DSSC Efficiency on Synthetic N3 Dyes

2015 ◽  
Vol 1131 ◽  
pp. 165-168 ◽  
Author(s):  
Chonchanok Talodthaisong ◽  
Kittiya Wongkhan ◽  
Taweesak Sudyoadsuk ◽  
Sayant Saengsuwan ◽  
Rukkiat Jitchati
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Nmr Spectra ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Ft Ir ◽  
Different Content ◽  
Sensitized Solar Cells ◽  
Research Studies

Abstract. Cis-di(thiocyanato)-bis(4,4'-dicarboxy-2,2'-bipyridine) ruthenium(II) (N3) has been used as the standard complex in the dye-sensitized solar cells (DSSCs). This research studies the N3s which are commercial (N3-1) and synthesized (N3-2 to N3-5) in DSSC as the dyes sensitizer. We found that the varied power efficiencies were observed from 4.54 to 5.92%. The TGA and FT-IR techniques were employed to measure the small molecules that cannot identify by NMR spectra. The results clearly seen that the N3s have a different content in water and methanol residuals which affect the N3s solubility leading to the varied performance in DSSCs.

Synthesis, crystal structure, DFT studies and photophysical properties of a copper(I)–triphenylphosphane complex based on trans-(±)-2,4,5-tris(pyridin-2-yl)-2-imidazoline

2017 ◽  
Vol 73 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Alberto Báez-Castro ◽  
Jesús Baldenebro-López ◽  
Laura Ceballos-Mendivil ◽  
Perla P. Román-Bravo ◽  
Herbert Höpfl ◽  
...  
Keyword(s):  
Density Functional ◽  
Photophysical Properties ◽  
Dye Sensitized Solar Cells ◽  
The Novel ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
H Nmr ◽  
Dye Sensitized ◽  
Homo And Lumo ◽  
Sensitized Solar Cells

The possibility of using less expensive and nontoxic metals, such as copper, as substitutes for more expensive heavy metals in the synthesis of new transition-metal complexes to be used as sensitizers in dye-sensitized solar cells (DSSCs) has stimulated research in this field. The novel photoluminescent copper(I) complex bis(triphenylphosphane-κP)[trans-(±)-2,4,5-tris(pyridin-2-yl)-2-imidazoline-κ2 N 2,N 3]copper(I) hexafluorophosphate, [CuI(C18H15N5)(C18H15P)2]PF6, has been successfully synthesized and characterized by IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction and thermogravimetric analysis. The complex showed interesting photophysical properties, which were studied experimentally in solution and in the solid state by UV–Vis and fluorescence spectroscopy. Density functional theory (DFT) calculations with dichloromethane as solvent reproduced reasonably well the HOMO and LUMO orbitals of the title compound.

scholarly journals Viscosity and Ionic Conductivity of Imidazolium based Ionic Liquids bearing Triiodide Anion

2021 ◽  
Vol 287 ◽  
pp. 02015
Author(s):  
Ruwaida Asyikin Abu Talip ◽  
Wan Zaireen Nisa Yahya ◽  
Mohamad Azmi Bustam
Keyword(s):  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Transport Properties ◽  
Dye Sensitized Solar Cells ◽  
H Nmr ◽  
Dye Sensitized ◽  
Low Viscosity ◽  
Redox Electrolyte ◽  
Volatile Organic ◽  
Sensitized Solar Cells

In the electrolyte application for dye sensitized solar cells, utilization of ionic liquids is getting the highlights to replace volatile organic solvent thanks to their low volatility, thermal and electrochemical stability. The iodide/triiodide redox electrolyte is the preferred choice for this application, hence numerous iodide-based ionic liquids have been explored and reported. On the contrary, the transport properties of triiodide based ionic liquid is often lack of reporting despite of having an equal influence on the overall viscosity and ionic conductivity of the electrolyte. In this study, three alkylimidazolium triiodide ionic liquids were synthesized from the respective alkylimidazolium iodide ionic liquids precursors and their physicochemical and conductivity properties are reported. 1H NMR analysis showed a slight shifting of position of the resonances of triiodide based alkylimidazolium ionic liquids as compared to their precursors due to less electronegativity nature of triiodide anion. The formation of triiodide-based imidazolium ILs have dramatically altered the transport properties in which the ionic liquids obtained are of low viscosity and high ionic conductivity.

scholarly journals Fabrication and Analysis of Photoelectrochemical Properties of Dye Sensitized Solar Cell Using Local Borneon Natural Dye Extracts

2015 ◽  
Vol 1107 ◽  
pp. 536-541 ◽  
Author(s):  
Mee Ching Ung ◽  
Rachel Fran Mansa ◽  
Coswald Stephen Sipaut ◽  
Jedol Dayou
Keyword(s):  
Dye Sensitized Solar Cells ◽  
Natural Dye ◽  
Natural Dyes ◽  
Dye Sensitized ◽  
Electron Conversion ◽  
Ft Ir ◽  
Ir Analysis ◽  
Amaranthus Spp ◽  
Sensitized Solar Cells ◽  
Etlingera Elatior

Natural dyes were extracted from the plant speciesEtlingera elatior,Duranta erectaandAmaranthus spp.that were collected from Keningau and Tambunan, Sabah, Malaysia. The possibility of photon-electron conversion was then assessed based on their absorption ability in the region of wavelength between 400-900nm. In addition, FT-IR analysis was carried out to determine if functional groups exists in their extracts. Finally, the DSSCs were assembled and their efficiency measured. It shows the successful conversion from visible sunlight to electricity by using extracts fromEtlingera elatior,Duranta erectaandAmaranthus spp.as raw natural dye sensitizers in Dye Sensitized Solar Cells (DSSCs) with efficiency of 0.1% ,0.06% and 0.04%, respectively. This result shows that local natural dyes can be used as sensitizer in DSSCs. However, further investigations are required to improve the efficiency.

Porphyrin-rhodanine dyads for dye sensitized solar cells

2006 ◽  
Vol 10 (08) ◽  
pp. 1007-1016 ◽  
Author(s):  
Lingamallu Giribabu ◽  
Ch. Vijay Kumar ◽  
P. Yella Reddy
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Acid Group ◽  
Redox Potentials ◽  
Free Base ◽  
Zinc Porphyrin ◽  
H Nmr ◽  
Dye Sensitized ◽  
Uv Visible ◽  
Sensitized Solar Cells

A series of four new porphyrin-rhodanine dyads were synthesized having the rhodanine acetic acid group either at the meso- or the pyrrole-β position of a free-base/zinc porphyrin. These dyads were fully characterized by UV-visible, 1 H NMR, MALDI-MS and fluorescence spectroscopies and cyclic voltammetry. Both the Soret and Q-bands were red-shifted in the case of pyrrole-β substituted dyads. The redox potentials of all four dyads were altered in comparison with their individual constituents. The dyads were tested in dye sensitized solar cells and the zinc metalated dyads gave a better performance in comparison with the corresponding free-base dyads.

scholarly journals Investigations of New Phenothiazine-Based Compounds for Dye-Sensitized Solar Cells with Theoretical Insight

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2292 ◽  
Author(s):  
Aneta Slodek ◽  
Dawid Zych ◽  
Grażyna Szafraniec-Gorol ◽  
Paweł Gnida ◽  
Marharyta Vasylieva ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Solar Cells ◽  
Density Functional ◽  
Dye Sensitized Solar Cells ◽  
Functional Theory ◽  
Dye Sensitized ◽  
Phenothiazine Dyes ◽  
Anchoring Groups ◽  
End Capping ◽  
Sensitized Solar Cells

New D-π-D-π-A low-molecular-weight compounds, based on a phenothiazine scaffold linked via an acetylene unit with various donor moiety and cyanoacrylic acid anchoring groups, respectively, were successfully synthesized. The prepared phenothiazine dyes were entirely characterized using nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The compounds were designed to study the relationship between end-capping donor groups’ structure on their optoelectronic and thermal properties as well as the dye-sensitized solar cells’ performance. The effect of π-conjugation enlargement by incorporation of different heterocyclic substituents possessing various electron–donor affinities was systematically experimentally and theoretically examined. Density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were implemented to determine the electronic properties of the novel molecules.

Novel Ru(II) Heteroleptic Complexes Anchored to TiO2 Nanocrystalline: Synthesis, Characterization and Application to Dye-sensitized Solar Cells

2012 ◽  
Vol 16 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Hashem Shahroosvand ◽  
Fahimeh Nasouti
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Electron Mediator ◽  
Nanocrystalline Tio2 ◽  
Dye Sensitized ◽  
Heteroleptic Complexes ◽  
Ft Ir ◽  
Anchoring Groups ◽  
Sensitized Solar Cells

A series of heteroleptic ruthenium(II) complexes from Ru(NO)(NO3)3 as precursor have been designed, synthesized, and characterized by 1H-NMR, FT-IR, UV–Vis, PL, ICP and CHN analyses. The reaction details and features were described in detail. Solar cells involving thin films of anatase TiO2 impregnated with these dyes were prepared using an electrolyte solution of I-/I3- in acetonitrile as the electron mediator, and their photovoltaic performance was evaluated. The system lacking carboxyl moiety as anchoring groups shows poor photovoltaic performance. We found that the efficiency of cell is strongly affected by the presence of carboxyl groups of the sensitizing dye, the efficiency of 1,2,4,5-benzentetracarboxylic acid(btec) ruthenium(II) (with three btec moieties) adsorbed on nanocrystalline TiO2 films being 4 times as large as that of bahtophenathrolin ruthenium(II) (with one nitrato group) adsorbed on the same films . An incident photon-to-current conversion efficiency (IPCE) of 8% at 510 nm was obtained for tris(1,2,4,5-benzentetracarboxylic acid) ruthenium(II) (4)

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