Syntheses and optoelectronic properties of amino/carboxyphenylporphyrins for potential use in dye-sensitized TiO2 solar cells

2007 ◽  
Vol 11 (08) ◽  
pp. 601-612 ◽  
Author(s):  
Michael G. Walter ◽  
Carl C. Wamser ◽  
Joseph Ruwitch ◽  
Yinping Zhao ◽  
Dale Braden ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solar Cell ◽  
Polyphosphoric Acid ◽  
Hydroxylamine Hydrochloride ◽  
Visible Spectroscopy ◽  
Dye Sensitized ◽  
Product Distributions ◽  
Synthetic Routes ◽  
Uv Visible ◽  
Potential Use

New mixed-substituent amino/carboxyphenylporphyrins for a dye-sensitized TiO 2 solar cell were prepared using several synthetic routes. The reaction of 4-carbomethoxy- and 4-acetamidobenzaldehydes with pyrrole in propionic acid under aerobic conditions afforded mixtures of mixed amide/ester substituted tetraphenylporphyrins which were separated using centrifugal chromatography then deprotected to give the target compounds. Condensation of p-nitrophenyldipyrromethane with 4-carbomethoxybenzaldehyde in CH 2 Cl 2 catalyzed by trifluoroacetic acid, followed by oxidation with dichlorodicyanoquinone gives trans-dicarbomethoxy/dinitrophenylporphyrin, which when treated with SnCl 2 and HCl affords the trans-diamino/dicarboxy derivative, trans- TA 2 C 2 PP . Commercially available tetrakis-5,10,15,20-(4-carboxyphenyl)porphyrin (TCPP) was converted to mixtures of mixed amino/carbomethoxyphenylporphyrins using hydroxylamine hydrochloride in polyphosphoric acid with methanol workup. Relative yields and product distributions from each route are discussed and the optoelectronic characteristics of the synthesized porphyrins were studied using UV-visible spectroscopy and cyclic voltammetry.

pH Influences on Optical Absorption of Anthocyanin from Black Rice as Sensitizer for Dye Sensitized Solar Cell TiO2 Nanoparticles

2016 ◽  
Vol 864 ◽  
pp. 154-158
Author(s):  
Mariya Al Qibtiya ◽  
Eka Cahya Prima ◽  
Brian Yuliarto ◽  
Suyatman
Keyword(s):  
Solar Cell ◽  
Optical Absorption ◽  
Dye Sensitized Solar Cell ◽  
Black Rice ◽  
X Ray ◽  
Dye Sensitized ◽  
Current Voltage ◽  
Average Grain Size ◽  
Uv Visible

Natural dyes extracted from black rice are used as sensitizer for dye sensitized solar cell. The anthocyanin extracted with various pH in acidic and neutral coditions. Preparation of fotolectrode TiO2 film using doctor blade method and resulting average grain size 33,9 nm using X-Ray Diffractometer. Characterization of morphology and cross-section film TiO2 is confirmed by Scanning Electron microscopy (SEM). Optical absorption using UV-Visible Spectroscopy to obtain spectrum absorbance of anthocyanin in various pH. The current-voltage (J-V) characterization shows the performance DSSC have a match relation to the optical absorption. The best absorption of anthocyanin obtained at pH 6 as well as conversion efficiency reaches 2.26% at this pH condition.

scholarly journals Fabrication of Norbixin-Sensitized Solar Cell and The Effect of Light Intensity on Its Performance and Reusability

2021 ◽  
Vol 926 (1) ◽  
pp. 012091
Author(s):  
W Rahmalia ◽  
E Crespo ◽  
T Usman
Keyword(s):  
Solar Cell ◽  
Light Intensity ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Performance Test ◽  
Energy Conversion Efficiency ◽  
Ester Group ◽  
Maximum Energy ◽  
Dye Sensitized ◽  
Uv Visible

Abstract Dye-sensitized solar cell (DSSC) is a third-generation solar cell that has been developed as one of the clean and renewable alternative energies. This study aims to fabricate norbixin-sensitized solar cell (NSSC). Norbixin was obtained from the saponification followed by acidification of bixin and characterized using UV-Visible and FTIR spectroscopy. The solar cell was assembled using anatase-TiO2 semiconductor, KI/I2/MPII in acetonitrile as the electrolyte, and a platinum paste-based cathode. The UV-Visible spectrophotometry analysis results showed three peaks of carotenoid characteristics at 434, 457, and 486 nm. The formation of norbixin was proved by the absence of a spectral peak for the C-O-C ester group of bixin at 1254 dan 1159 cm-1” The cells performance test showed that the maximum energy conversion efficiency of NSSC increased with increasing light intensity up to 0.08 W/cm2. Exposure to the light above this intensity causes a decrease in the maximum energy conversion efficiency due to the temperature factor. The data also showed that the cell assembled was reusable. It still showed relatively good performance until the third day of analysis.

scholarly journals Novel NiMgOH-rGO-Based Nanostructured Hybrids for Electrochemical Energy Storage Supercapacitor Applications: Effect of Reducing Agents

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1144
Author(s):  
Konda Shireesha ◽  
Thida Rakesh Kumar ◽  
Tumarada Rajani ◽  
Chidurala Shilpa Chakra ◽  
Murikinati Mamatha Kumari ◽  
...  
Keyword(s):  
Particle Size ◽  
Cyclic Voltammetry ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Particle Size Analyzer ◽  
Uv Visible

This paper describes the synthesis and characterization of NiMgOH-rGO nanocomposites made using a chemical co-precipitation technique with various reducing agents (e.g., NaOH and NH4OH) and reduced graphene oxide at 0.5, 1, and 1.5 percent by weight. UV-visible spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, a particle size analyzer, and cyclic voltammetry were used to characterize the composite materials. The formation of the NiMgOH-rGO nanocomposite with crystallite sizes in the range of 10–40 nm was inferred by X-ray diffraction patterns of materials, which suggested interlayers of Ni(OH)2 and Mg(OH)2. The interactions between the molecules were detected using Fourier-transform infrared spectroscopy, while optical properties were studied using UV-visible spectroscopy. A uniform average particle size distribution in the range of 1–100 nm was confirmed by the particle size analyzer. Using cyclic voltammetry and galvanostatic charge/discharge measurements in a 6 M KOH solution, the electrochemical execution of NiMgOH-rGO nanocomposites was investigated. At a 1 A/g current density, the NiMgOH-rGO nanocomposites prepared with NH4OH as a reducing agent had a higher specific capacitance of 1977 F/g. The electrochemical studies confirmed that combining rGO with NiMgOH increased conductivity.

scholarly journals PENGARUH PERUBAHAN INTENSITAS CAHAYA HALOGEN RUTHENIUM (N719) FOTOSENSITIZER DALAM DYE-SENSITIZED SOLAR CELL(DSSC)

2016 ◽  
Vol 6 (2) ◽  
pp. 70
Author(s):  
H Hardani ◽  
Hendra Darmaja ◽  
Muh. Iman Darmawan ◽  
C Cari ◽  
Agus Supriyanto
Keyword(s):  
Solar Cell ◽  
Spin Coating ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitizer ◽  
Dye Sensitized ◽  
Uv Visible

Penelitian ini merupakan penelitian awal untuk mempelajari dan memahami proses pembuatan sel surya berbasis Dye Sensitized Solar Cell (DSSC) menggunakan Ruthenium (N719). Lapisan fotoelektroda TiO2 menggunakan pasta TiO2 ukuran 21 nm yang dideposisi menggunakan teknik spin coating dan pewarna N719 sebagai dye sensitizer. Counter elektroda Platina dideposisi menggunakan teknik sputtering. Parameter proses yang mempengaruhi karakteristik listrik sel surya dianalisa dan diukur. Karakteristik kurva I-V sel surya diukur menggunakan Kethely dengan variasi intensitas yaitu 100 Watt/m2, 250 Watt/m2, 500 Watt/m2, 750 Watt/m2 dan 1000 Watt/m2.Prototipe sel yang terbaik menghasilkan effisiensi sebesar 0,15%.Uji absorbansi menggunakan Spectrophotometer UV Visible 1601 PC dan uji sifat kelistrikan menggunakan Elkahfi 100/Meter I-V. Hasil menunjukkan bahwa pewarna organik sintesis ruthenium (N719) memiliki absorbansi yang kuat pada panjang gelombang 400-550 nm ini menjadikan dye ruthenium (N719) perlu untuk di selidiki sebagai bahan fotosensitizer DSSC.

Synthesis and electrochemical investigation of covalently linked porphyrin dimers containing a β-brominated subunit.

2003 ◽  
Vol 07 (09) ◽  
pp. 595-609 ◽  
Author(s):  
Zhongping Ou ◽  
Pietro Tagliatesta ◽  
Mathias O. Senge ◽  
Jianguo Shao ◽  
Karl M. Kadish
Keyword(s):  
Cyclic Voltammetry ◽  
Single Crystal ◽  
Electrochemical Investigation ◽  
Visible Spectroscopy ◽  
Electronic Interactions ◽  
X Ray ◽  
Uv Visible ◽  
Covalently Linked ◽  
Porphyrin Dimers

Ten meso-tetraphenylporphyrin-type heterodimers containing a partly or completely β-brominated subunit were synthesized and characterized by UV-visible spectroscopy, cyclic voltammetry and spectroelectrochemistry, showing the presence of low electronic interactions between the two subunits. The investigated compounds are represented as M [( tripp - tpp ( Br 4)] M and M [ tripp - tpp ( Br 8)] M ( M = 2 H , Zn , Ni , Co and Cu ) where tripp - tpp ( Br 4) is the tetraanion of 1-[5-(10,15,20-triphenylporphyrinyl)]-4-[10-(2,3,12,13-tetrabromoporphyrinyl)]-benzene and tripp - tpp ( Br 8) is the tetraanion of 1-[5-(10,15,20-triphenylporphyrinyl)]-4-[10-(2,3,7,8,12,13,17,18-octabromoporphyrinyl)]-benzene. One of the synthesized dimers, H 2[ tripp - tpp ( Br 8)] H 2, was characterized by a single-crystal X-ray investigation.

Characterization of Mammea A/AA in solution and in interaction with β-cyclodextrin: UV–visible spectroscopy, cyclic voltammetry and DFT-TDDFT/MD study

2016 ◽  
Vol 213 ◽  
pp. 294-303 ◽  
Author(s):  
Baruch A. Ateba ◽  
Daniel Lissouck ◽  
Anatole Azébazé ◽  
Christophe Thiery Ebelle ◽  
Achille Nassi ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Visible Spectroscopy ◽  
Uv Visible

Difunctionalized N-Confused Porphyrins: Synthesis, Fluorescence, and Electrochemical Studies

2015 ◽  
Vol 68 (6) ◽  
pp. 896 ◽  
Author(s):  
Sudipta Das ◽  
Naresh Balsukuri ◽  
Praseetha E. Kesavan ◽  
Iti Gupta
Keyword(s):  
Mass Spectrometry ◽  
Cyclic Voltammetry ◽  
Infrared Spectroscopy ◽  
High Resolution Mass Spectrometry ◽  
Electrochemical Studies ◽  
Visible Spectroscopy ◽  
Fluorescence Studies ◽  
Uv Visible ◽  
Stokes Shifts ◽  
Resolution Mass

Seven di-substituted N-confused porphyrins (NCPs) 9–15 bearing two aryl functional groups (cis-A2B2 type) were synthesized in 4–7 % yields via [3+1] approach. The corresponding five 5,10-diaryl-substituted symmetrical tripyrranes 1–5 were prepared and condensed with 2,4-bis(hydroxypentaflurophenyl)pyrrole 6. Two outer N-methyl type A2B2 NCPs 14 and 15 were also prepared via a similar approach using a new key precursor 8. All the porphyrins 9–15 were characterized by high-resolution mass spectrometry, NMR, infrared spectroscopy, UV–visible spectroscopy, fluorescence spectroscopy, and cyclic voltammetry. Fluorescence studies of 9–15 showed blue-shifted emission maxima and lower Stokes shifts values when compared with N-confused tetraphenylporphyrin (NCTPP). Electrochemical studies indicated easier oxidation of N-methyl NCPs 14 and 15 when compared with remaining NCPs 9–13.

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