scholarly journals Molecular interaction of natural dye based on Zea Mays and Bixa Orellana to nanocrystalline TiO2 into dye sensitized solar cells.

2021 ◽  
Author(s):  
Arnold Anthony Huamán Aguirre ◽  
Karim Salazar Salinas ◽  
María Quintana Cáceda
Keyword(s):  
Zea Mays ◽  
Dye Sensitized Solar Cells ◽  
Bixa Orellana ◽  
Nanocrystalline Tio2 ◽  
Visible Absorption ◽  
Current Voltage ◽  
Effects Of Ph ◽  
Seed Extraction ◽  
Ft Ir ◽  
Anchoring Groups

This work studies the interaction between natural dyes obtained from Peruvian Zea mays and Bixa orellana seeds and nanostructured titanium dioxide in order to evaluate their function as sensitizers into solar cell devices. The effective attachment of dyes to the TiO2 layer is corroborated by the comparison of UV-Visible absorption and FT-IR spectra of the extracted dye solutions and sensitized TiO2 electrodes. The principal compounds from the seed extraction of Zea mays and Bixa orellana are cyanidin-3-glucoside (C3G) and bixin, respectively, which were analyzed in an isolated dye/cluster TiO2 system by molecular dynamic simulation. The results showed that the chemisorption is carried out through a consecutive deprotonation process and Ti-O bond formation by the monodentate OH and COOH anchoring groups, for C3G and bixin, respectively. Finally, we tested the effect of the dye – TiO2 interaction on the charge transfer by the comparison of the current-voltage (I-V) curves and incident photon-to-current conversion efficiency (IPCE) of the cells. We found that dye agglomeration in films with Bixa orellana and the high charge recombination of films with Zea mays are critical points to be solved. For this reason, we propose the pretreatment of the TiO2 film before sensitization with Bixa orellana and analyze the effects of pH in Zea Mays solution, in order to obtain better device efficiencies.

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)

scholarly journals Photoelectric Properties of DSSCs Sensitized by Phloxine B and Bromophenol Blue

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Penghui Ren ◽  
Yuanzuo Li ◽  
Yuehua Zhang ◽  
Hongshuai Wang ◽  
Qungui Wang
Keyword(s):  
Dipole Moment ◽  
Dye Sensitized Solar Cells ◽  
Electron Injection ◽  
Open Circuit ◽  
Frontier Molecular Orbital ◽  
Bromophenol Blue ◽  
Photoelectric Properties ◽  
Current Voltage ◽  
Ft Ir ◽  
Sensitized Solar Cells

Phloxine B and bromophenol blue as the sensitizers of dye-sensitized solar cells were investigated via UV-Vis spectra, FT-IR spectra, fluorescence spectra, and current-voltage characteristics. The frontier molecular orbital, vibration analysis, and the first hyperpolarizability were calculated with DFT/6-31G(d). The dipole moment, light harvesting efficiency (LHE), and larger absolute value of driving force of electron injection (ΔGinject) were also discussed. The calculated results were compared with the experimental results of phloxine B and bromophenol blue. It was found that, compared with bromophenol blue, bigger dipole moment of phloxine B results in larger open circuit voltage (Voc) according to the correlation between dipole moment andVoc. At the same time, for configuration of phloxine B, it has higher LHE andΔGinject, which are helpful to enhance the abilities of absorbing sunlight and electron injection. Therefore, higher LHE andΔGinjectfor phloxine B produced a larger value ofJsc.

Synthesis of Silatrane-Containing Organic Sensitizers as Precursors for the Silyloxyl Anchoring Group in Dye-Sensitized Solar Cells

Synthesis ◽  
2017 ◽  
Vol 49 (17) ◽  
pp. 3975-3984 ◽  
Author(s):  
Matteo Bessi ◽  
Marco Monini ◽  
Massimo Calamante ◽  
Alessandro Mordini ◽  
Adalgisa Sinicropi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Coupling Reaction ◽  
Spectroscopic Properties ◽  
Nanocrystalline Tio2 ◽  
Dye Sensitized ◽  
Anchoring Groups ◽  
The Stability ◽  
Silicon Based ◽  
Sensitized Solar Cells

A series of organic D-π-A dyes, endowed with different silicon-based anchoring groups, has been prepared to assess the stability of such anchoring moieties on nanocrystalline TiO2 in dye-sensitized solar cells. Due to the difficulties encountered in finding a reliable and robust preparation protocol to obtain pure trialkoxysilanes, replacement with a silatrane moiety was evaluated. It was found that the silatrane group could be easily introduced on three different molecular scaffolds by using a simple amide coupling reaction mediated by EDC-Cl. Furthermore, the spectroscopic properties and anchoring mode on nanocrystalline TiO2 of the silatrane dyes were found to be nearly identical to those of the trialkoxysilane compounds, and both gave a much more stable attachment to the semiconductor compared with their cyano­acrylic acid counterpart, as shown by desorption experiments.

Effects of pH of Dyes on Characteristics of Dye-Sensitized Solar Cells

2010 ◽  
Vol 130 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Shoji Furukawa ◽  
Hiroshi Iino ◽  
Koudai Kukita ◽  
Kaoru Kaminosono
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Effects Of Ph ◽  
Sensitized Solar Cells

Molecular engineering of anchoring groups for designing efficient triazatruxene-based organic dye-sensitized solar cells

2019 ◽  
Vol 43 (17) ◽  
pp. 6480-6491 ◽  
Author(s):  
Narendra Nath Ghosh ◽  
Md. Habib ◽  
Anup Pramanik ◽  
Pranab Sarkar ◽  
Sougata Pal
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Organic Dye ◽  
Molecular Engineering ◽  
Dye Sensitized ◽  
Anchoring Groups ◽  
Sensitized Solar Cells

Triazatruxene with designed anchoring groups provides better photovoltaic activities.

scholarly journals A highly sensitive octopus-like azobenzene fluorescent probe for determination of abamectin B1 in apples

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhenlong Guo ◽  
YiFei Su ◽  
Kexin Li ◽  
MengYi Tang ◽  
Qiang Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Limit Of Detection ◽  
Quantitative Detection ◽  
Fluorescence Signal ◽  
Ionization Mass ◽  
Limit Of Quantification ◽  
Visible Absorption ◽  
Esi Ms ◽  
Relative Standard ◽  
Ft Ir

AbstractThe development of detecting residual level of abamectin B1 in apples is of great importance to public health. Herein, we synthesized a octopus-like azobenzene fluorescent probe 1,3,5-tris (5′-[(E)-(p-phenoxyazo) diazenyl)] benzene-1,3-dicarboxylic acid) benzene (TPB) for preliminary detection of abamectin B1 in apples. The TPB molecule has been characterized by ultraviolet–visible absorption spectrometry, 1H-nuclear magnetic resonance, fourier-transform infrared (FT-IR), electrospray ionization mass spectroscopy (ESI-MS) and fluorescent spectra. A proper determination condition was optimized, with limit of detection and limit of quantification of 1.3 µg L−1 and 4.4 μg L−1, respectively. The mechanism of this probe to identify abamectin B1 was illustrated in terms of undergoing aromatic nucleophilic substitution, by comparing fluorescence changes, FT-IR and ESI-MS. Furthermore, a facile quantitative detection of the residual abamectin B1 in apples was achieved. Good reproducibility was present based on relative standard deviation of 2.2%. Six carboxyl recognition sites, three azo groups and unique fluorescence signal towards abamectin B1 of this fluorescent probe demonstrated reasonable sensitivity, specificity and selectivity. The results indicate that the octopus-like azobenzene fluorescent probe can be expected to be reliable for evaluating abamectin B1 in agricultural foods.

Improved performance of dye-sensitized solar cells by employing acid treated Ti layer on the nanocrystalline TiO2

2014 ◽  
Vol 554 ◽  
pp. 204-208 ◽  
Author(s):  
Songyi Park ◽  
Min-Kyu Son ◽  
Soo-Kyoung Kim ◽  
Na-Yeong Hong ◽  
Jeong-Yun Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Nanocrystalline Tio2 ◽  
Dye Sensitized ◽  
Improved Performance ◽  
Sensitized Solar Cells

scholarly journals Neutral copper(i) dipyrrin complexes and their use as sensitizers in dye-sensitized solar cells

2014 ◽  
Vol 43 (10) ◽  
pp. 4127-4136 ◽  
Author(s):  
Tracy E. Hewat ◽  
Lesley J. Yellowlees ◽  
Neil Robertson
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

[Cu(i)(dipyrrin)(bipy)] complexes have been prepared and show intense visible absorption leading to function as sensitizing dyes in solar cells.

GROWTH OF ANTIMONY DOPED ZnO FIBER AND ITS APPLICATION IN DYE SENSITIZED SOLAR CELLS

2010 ◽  
Vol 03 (04) ◽  
pp. 279-283 ◽  
Author(s):  
LEI GUO ◽  
LEI L. KERR
Keyword(s):  
Thermal Evaporation ◽  
Dye Sensitized Solar Cells ◽  
Antimony Oxide ◽  
Dye Sensitized Solar Cell ◽  
Evaporation Process ◽  
Electron Backscattered Diffraction ◽  
Dye Sensitized ◽  
Current Voltage ◽  
Doped Zno ◽  
Sensitized Solar Cells

Antimony doped ZnO (ZnO:Sb) fiber was grown by a simple thermal evaporation process of Zn powder and Sb2O3 . Scanning Electron Microscopy (SEM) shows that the grown fiber reaches more than 70 μm, which is the longest ZnO fiber reported in literature. Electron Backscattered Diffraction (EBSD) study indicates that this crystal is composed of three main phases: antimony doped zinc oxide (ZnO:Sb) , ordonezite (ZnSb2O6) and zinc antimony oxide (Zn7Sb2O12) . The current–voltage (I–V) characteristics demonstrate that the conversion efficiency of dye sensitized solar cell was greatly enhanced by ZnO:Sb fiber.

Preparation and Photocatalytic Activity of Cu/BiVO4 by Solid State Grinding Method for Degradation of Methyl Orange

2016 ◽  
Vol 703 ◽  
pp. 321-325
Author(s):  
Hai Feng Chen ◽  
Jia Mei Chen ◽  
Zhi Xue Pan
Keyword(s):  
Methyl Orange ◽  
Solid State ◽  
Visible Light ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Illumination Time ◽  
Grinding Method ◽  
Ft Ir ◽  
Degradation Of Methyl Orange

In this work, novel Cu/BiVO4 photocatalyst were prepared by a low-temperature solid state grinding method using Bi (NO3)3•5H2O, NH4VO3 and Cu (NO3)2•2H2O as raw materials. The structure and properties of the samples were characterized by Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD) and UV-vis diffused reflectance spectroscopy (DRS); Using the degradation of methyl orange (MO) as the probe, it was simulated as the degradation of sewage under the visible light to study the influence of the illumination time and the amount of photocatalysts. Compared with the pure BiVO4, the visible-light absorption scope of BiVO4 was broadened by doping Cu, the UV-Visible absorption edges were slightly red shift and the band gap was narrower. Comparatively speaking, the results indicted that the doped Cu enhanced the photocatalytic activities of BiVO4.

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