Preparation of polyaniline/TiO2 nanocomposite film with good adhesion behavior for dye‐sensitized solar cell application (original) (raw)
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Current Applied Physics, 2014
Polyaniline nanowires (PANI NWs) were deposited onto fluorine-doped tin oxide (FTO) glass substrate using the cyclic voltammetric method with aniline monomer precursor in HCl aqueous solution. The secondary oxidation peak plays an important role in polymerization of aniline monomer and the optimization of catalytic activity of PANI-based counter electrodes was achieved by controlling the number of cycles. The photovoltaic performance of the dye-sensitized solar cells (DSSCs) with PANI NWs counter electrodes (CEs) was optimized at 4th cycles, and then following parameters were obtained: J sc ¼ 17.2 mA cm À2 , V oc ¼ 0.71 V, FF ¼ 59.3%, and efficiency (h) ¼ 7.24%. While, J sc ¼ 14.7 mA cm À2 , V oc ¼ 0.77 V, FF ¼ 70.6%, and efficiency (h) ¼ 7.98% in cells with Pt CEs. The PANI NWs were attractive as an alternative CEs for the low-cost DSSCs instead of Pt.
Performance of Dye-Sensitized Solar Cell Based on Polyaniline Composites
2013
Two series of polyaniline (PANI) are prepared by using HCL (PANI-1) or oxalic acids (PANI-2) as dopants. Polymer composites of PANI-1 are synthesized by using polyethylene oxide 300 (PEO300-PANI-1), polyethylene oxide 2000 (PEO2000-PANI-1), TiO in different ratios, an 2 d ZnO nanoparticles. The hybrid of water soluble PANI-2 with polyethylene oxide 2000 (PEO2000-PANI-2) was also prepared. Polymer samples and composites are characterized by using FTIR, UV and their morphology was examined by TEM. Electrical conductivity measurements for polymer composites showed that addition of o 0 t .1% TiO 2PANI increases its electrical conductivity value from 1.15 ×10 −4 to 3.35 S.cm −1 , while the water soluble PANI (PANI-2) has moderate electrical conductivity value of ()0.56 ×10−2 S.cm −1 . Dye-sensitized solar cells (DSSCs) ()1 cm 2 are assembled using polymer electrolytes based on polyaniline (PANI) and its nanocomposites as gel electrolytes and a synthetic dye (N3) as a sensitizer. The DSSC...
Nanographite/polyaniline composite films as the counter electrodes for dye-sensitized solar cells
Journal of Materials Chemistry, 2011
Nanographite/polyaniline (NG/PANI) composite films were developed and characterized, and the performances of the dye-sensitized solar cells (DSSCs) employing these composite films as the counter electrode (CE) were evaluated in this study. The nanographite/aniline (NG/ANI) particle was firstly synthesized by a reflux method and served as the monomer for the electro-polymerization of the NG/ PANI composite films. The surface modification of NG by ANI was confirmed by EDX mapping, TEM image, zeta-potential, and UV-Vis absorption measurements. The electro-polymerized NG/ PANI composite films were characterized by Raman spectroscopy, XPS, and conducting-AFM, which verified the successful incorporation of NGs in the PANI films. The electro-catalytic activity of the NG/ PANI composite film was evaluated using the positive-feedback mode of scanning electrochemical microscopy (SECM), by which a comparable heterogeneous rate constant (k s 0) for the ferrocene/ ferrocenium (Fc/Fc +) redox pair was obtained and compared with that of a sputtered Pt. The DSSC employing the NG/PANI (20 mC cm À2) CE exhibited a higher short-circuit current density (J SC) but lower fill factor (FF), and gave a comparable power-conversion efficiency (h) of 7.07%, as compared to that of a DSSC containing a sputtered Pt CE (h ¼ 7.19%).
In this study, novel Polyaniline polymer (PANI) was deposited on SnO2 conductive glass which prepared to act as counter electrode in dye sensitized solar cell (DSSC). The counter electrode was characterized using Fourier Transform Infrared and UV-Vis spectrometers. A simple method was used to synthesis PANI film consist from two electrodes after take optimum voltage for Polymerization of Aniline by using potentiostat. The film showed high adhesion on the SnO2 conductive glass in compare with ITO conductive glass, led to higher incident photon to current conversion efficiency (IPCE) in solar cell. The efficiencies values were 46% and 52% for the films deposited on SnO2 glass and ITO glass respectively. The cost ratio of used SnO2 in comparison with ITO conductive glass is 1:5 by price. This gave economy preference to deposited PANI on SnO2 conductive glass in fabrication of DSSC.
Preparation of Polyaniline/TiO2 Photovoltaic Solar Cell
Science Letters
Polyaniline (PANI) and Kronos C doped Titanium dioxide (TiO2) was fabricated as PANI/TiO2 solar cell and reported on its simple photovoltaic performance detected by using voltameter and tested for stability for 12 months. The PANI and TiO2 were coated onto different indium tin oxide (ITO) glass plates by using a drop-casting method and sandwich attached for simple solar cell preparation. PT4 sample was the optimum solar cell with 0.2: 0.2 g of PANI: TiO2 ratio under 2 cm2 surface area based on the highest voltage produces from 100 mW cm-1 of light intensity metal highlight lamp. No voltage was detected for PT7 where the single layer TiO2 coated without PANI attached for solar cell system using same fabrication. It shows that PANI has a significant role in functionalizing the photovoltaic system. The C-N stretching of aromatic amine and C-N stretching for the benzenoid at peaks of 1222 and 1166 cm-1 respectively in FTIR spectra has confirmed the PANI structure supported by an XRD pat...
Application of microporous polyaniline counter electrode for dye-sensitized solar cells
Electrochemistry Communications, 2008
An inexpensive microporous polyaniline (PANI) is used as a substitute for platinum to construct the counter electrode in dye-sensitized solar cells (DSSCs). The PANI counter electrode with microporosity and a size diameter of about 100 nm possesses lower charge-transfer resistance and higher electrocatalytic activity for the I À 3 =I À redox reaction than Pt electrode does. The overall energy conversion efficiency of the DSSC with PANI counter electrode reaches 7.15%, which is higher than that of the DSSC with Pt counter electrode. The excellent photoelectric properties, simple preparation procedure and inexpensive cost allow PANI electrode to be a credible alternative for DSSCs.
Scientific reports, 2014
Dye-sensitized solar cell (DSSC) is a promising solution to global energy and environmental problems because of its clean, low-cost, high efficiency, good durability, and easy fabrication. However, enhancing the efficiency of the DSSC still is an important issue. Here we devise a bifacial DSSC based on a transparent polyaniline (PANI) counter electrode (CE). Owing to the sunlight irradiation simultaneously from the front and the rear sides, more dye molecules are excited and more carriers are generated, which results in the enhancement of short-circuit current density and therefore overall conversion efficiency. The photoelectric properties of PANI can be improved by modifying with 4-aminothiophenol (4-ATP). The bifacial DSSC with 4-ATP/PANI CE achieves a light-to-electric energy conversion efficiency of 8.35%, which is increased by ~24.6% compared to the DSSC irradiated from the front only. This new concept along with promising results provides a new approach for enhancing the phot...
Transport and Communications Science Journal, 2020
We report the successful application of reduced graphene oxide–titania (rGO–TiO2) nanocomposite as an efficient photoelectrode and an inexpensive polyaniline (PANI) synthesized by in-situ polymerization on graphite foam as a platinum substitute for tri-iodide reduction for dye‐sensitized solar cell (DSC). The bulk carrier concentration and conductivity of the PANI was measured to be 3.02x1017cm-3 and 4.89x10-1 W-1cm-1 respectively. Subsequently, three DSCs were assembled with rGO–TiO2 nanocomposite photoelectrode and PANI as counter electrode for one and the other two assembled using unmodified TiO2 photoelectrode with PANI and platinum as counter electrodes, respectively. The rGO loading allows more dye to be adsorbed due its large surface area thus improving the light harvesting efficiency (LHE). This improvement in LHE increases the short circuit current density (JSC). The JSC increase is more substantial compared to the reduction in VOC; thus, the increase in the efficiency of t...
Natural Dye-Sensitized Solar Cells with Polyaniline Counter Electrode
An inexpensive polyaniline was synthesized by electrochemical polymerizat ion on conducting glass as a platinum substitute for tri-iodide reduction on the conducting glass substrate, and natural sensitizers as a synthetic dyes replacement. Plant pigments such as chlorophyll, caroten oid, flavonoid, anthocyanin, betalains are present in natural sensitizers are responsible for light absorption and the charge injection to the conduction band of the semiconductor nanoparticles. The efficiencies of dye-sensitized solar cell (DSSC) with natural sensitizers and synthetic dye i.e. N719 with polyaniline as a counter electrode catalyst was compared.
Effect of TiO2 Thin Film Morphology on Polyaniline/TiO2 Solar Cell Efficiency
World Journal of Nano Science and Engineering, 2015
Nanocrystalline titanium dioxide (TiO 2) thin films were prepared by using sol-gel through spincoating method. An assembly of indium tin oxide (ITO)/TiO 2 /polyaniline (PANI)/Ag was made in a sandwich panel structure. The obtained junction shows rectifying behavior. Additionally, the I/V characteristic indicates that a P-N junction at nanocrystalline PANI/TiO 2 interface has been created. In this experimental study, we depended only on the ratio between titanium and PANI in the process of preparing sol-gel (PANi/TiO 2 at 20% wt). The largest open circuit voltage of 656 mV and short current density of 0.00315 mΑ/cm 2 produce 0.0004% power conversion solar cell (η) under simulated solar radiation (50 mW/cm 2). The thin films of PANI and titanium oxide (TiO 2)/ PANI composites were synthesized by sol-gel technique. Pure TiO 2 powder with nanoparticle size of less than 25 nm and PANI were synthesized through chemical oxidative polymerization of aniline monomers. The composite films were characterized by high resolution X-ray diffraction, Fourier transform infrared spectroscopy, field effect scanning electron microscopy, and UV-vis spectroscopy. The results were compared with the corresponding data on pure PANI films. The intensity of diffraction peaks for PANI/TiO 2 composites is lower than that for TiO 2. The characteristic of the FTIR peaks of pure PANI shifts to a higher wave number in TiO 2 /PANI composite, which is attributed to the interaction of TiO 2 nanoparticles with PANI molecular chains.