Papers by Keyword: DSSC

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Authors: Li Chun Xuan, Yuan Ru Guo, Qing Jiang Pan
Abstract: Transition metal phthalocyanine complexes have been applied in the dye-sensitized solar cells (DSSCs), owing to their high absorbance coefficient in red-light region, good thermodynamic stability and facile synthesis. Structures of carboxyphthalocyanine complexes containing zinc, cadmium and mercury were optimized using the B3LYP functional. The M-N distances (M = Zn, Cd and Hg) were calculated to be 2.03, 2.12 and 2.16 Å, respectively. On the basis of these geometries, the electronic spectra in ethanol were predicted at the time-dependent density functional theory (TD-DFT) level. It was shown that the variation of Zn→Cd→Hg changes the transition nature of lower-energy absorption, but slightly affects the excitation energies. In addition, the effects of basis sets (Lan2DZ and SDD), solvent-effect models (PCM and CPCM) and solvents (ethanol and methanol) on absorption spectra were discussed in detail.
Authors: Feng Bin
Abstract: This paper introduces the basic structure and operating principle of DSSC. For its own characteristics, and compared to conventional crystalline silicon solar cells, then using SWTO analysis methods to analyze its market prospects.
Authors: Risa Suryana, Khoiruddin, Agus Supriyanto
Abstract: Beta-carotene dye which is extracted from daucus carota material was used as sensitizer to fabricate dye-sensitized solar cell (DSSC). DSSCs were arranged in a sandwich structure consisting of fluorine-doped tin oxide (FTO) as a transparent conducting oxide (TCO), titanium dioxide (TiO2) layer, beta-carotene dye, iodide/tri-iodide redox electrolyte, and carbon layer as a counter electrode. Beta-carotene dye has an absorbance in wavelength zones from 415 to 508 nm. Meanwhile, it has the largest photoconductivity of 28.3×10-4 and 8.2×10-4 (Ω.m)-1 in dark and bright conditions, respectively. Moreover, the photoelectrochemical performance of the DSSC based on beta-carotene dye showed that the maximum voltage of 23.9×10-2 V and the maximum current of 3.3×10-5 A. However, the photo-to-electric conversion efficiency of this DSSC was very low i.e. 12.5×10-4 %.
Authors: Chonchanok Talodthaisong, Kittiya Wongkhan, Taweesak Sudyoadsuk, Sayant Saengsuwan, Rukkiat Jitchati
Abstract: 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.
Authors: Irana Eka Putri, M. Leonard Sidik, Ruri Agung Wahyuono, Dyah Sawitri, Doty Dewi Risanti
Abstract: High efficiency of light-to-energy conversion in dye-sensitized solar cell (DSSC) was achieved by applying anthocyanin as photosensitizer and TiO2 as photoelectrode. TiO2 anatase phase was synthesized by using co-precipitation method from TiCl3 precipitate. Anthocyanin (A) from Garcinia mangostana pericarp was combined with β-carotene (B) from Daucus carota and curcumin (C) pigments from Curcuma longa. According to UV-Vis analysis the wavelength absorptions of anthocyanin, β-carotene, and curcumin are 399 nm, 471 nm, and 470 nm, respectively. The A–B–C produced the short-circuit current density (JSC) of 77.7 μA, the open-circuit voltage (VOC) of 343.2 mV, the fill factor (FF) of 32.3, and the efficiency (η) of 0.042%. It is found that there exists a synergistic effect between anthocyanin and curcumin as indicated by broader absorption wavelengths, whilst the mixture between anthocyanin and β-carotene does not show the synergistic effect. The high efficiency of layered co-sensitization is attributed to the high adsorption capacities of curcumin in the outer layer. On the other hand, the effect can be explained on the basis of light scattering effect.
Authors: Sophia Selvarajan, J. Jerry, Arun Dakshinamurthy, A. Ramasubbu, P. Mosae Selvakumar
Abstract: In this study, we investigated the photovoltaic efficiency of DSSC (Dye Sensitized Solar Cell) using five different organic dyes extracted from natural sources namely Gomphrena globosa, Syzygium cumini (fruit and leaf), Crocus sativus, Caesalpinia sappan and Rubia cordifolia. Commercially obtained TiO2 powder, coated over the conducting glass substrate was used as the photo anode and the same coated with carbon soot was used as the photo cathode. UV spectrophotometer and photoluminescence spectrophotometer were used to characterize the dyes to find their absorption and emission maxima respectively. X-Ray diffractometer was used to characterize the TiO2 electrode film. SEM analysis was also carried out to study the surface morphology. The life and efficiency of DSSC can be improved by studying the dye absorption process and the thickness, size and shape of TiO2 coating. Thus, low cost solar cells can be developed with significant power conversion efficiency.Key words: TiO2, DSSC, natural dyes, ITO glass slides, carbon soot, sintering.
Authors: Sahrul Saehana, Elfi Yuliza, Pepen Arifin, Khairurrijal, Mikrajuddin Abdullah
Abstract: Dye-sensitized solar cell (DSSC) which employed natural dye from black rice has been successfully fabricated and improved its performance by depositing interconnected copper (copper bridge) on the space between TiO2. The copper bridge has significant role in minimizing recombination of electron-hole which occurred in TiO2 surface by trapping electron and facilitating to anode. The presence of interconnected copper nanoparticle in the space between TiO2 nanoparticle was confirmed by Scanning Electron Microscopy (SEM) and X-Ray Diffractometer (XRD). The current-voltage (I-V) characterization of DSSC solar cells by using Keithley 617 was also performed to investigate performance of solar cells under sun illumination in varying intensities. It is found that performance of copper coated DSSC solar cells (efficiency 0.35% and fill factor 0.35) is higher than DSSC without copper coating (efficiency 0.17% and fill factor 0.35). This result is consistent with impedance spectroscopy analyzing where the internal resistance of copper coated DSSC solar cells is lower than DSSC without coated. It is concluded that performance of DSSC increasing with decreasing of internal resistance. Our finding is higher than other researcher reports in Ref. [13] and [14] with similar structure and kind of natural dye. In addition, this paper also reports the use of polymer electrolyte which employing polyvinyl acetate (PVA) containing lithium ion to maintain long-term stability of device.
Authors: Rangga Winantyo, Djoko Hartanto, Kenji Murakami
Abstract: Kim et al. suggest that replacing ZnO particle with ZnO vertically aligned nanorods shows much higher energy conversion efficiency [1]. The difference between nanoparticles and nanorods can be seen on figure 1. Yet, vertically aligned nanorods can be grown through the difficult and expensive methods. Pomar et al. reported the growing through atomic layer deposition (ALD) method [2]. Jeong et al. grew the vertically aligned nanorods using metal-organic chemical vapor deposition (MOCVD) method with really high temperature (700-900oC) [3]. When the nanorods are applied for DSSCs, synthesizing really fine nanorods is not necessary. Lee et al. managed to grow nanorods on the seed layer for DSSC application which was post-annealed at 500-600oC [4]. Hu et al. reported vertically aligned nanorods using low temperature chemical bath method, but the deposition time is between 3 hours and 6 days [5].
Authors: Chuan Xiang Zhang, Zu Guo Bao, Hai Jun Tao
Abstract: TiO2 nanotube arrays (TNAs) fabricated by anodization were quenched to obtain high-quality samples for the application of such electrodes in dye-sensitized solar cells (DSSC). The morphology, crystallization structure and photoelectrochemical properties of the samples were studied. The results showed that the quenched nanotubes assembled together into bundles but every single one maintained tubelike shape. In transient photocurrent response of electrode, photocurrent increased with the increasing of bias potential and photoelectrochemical properties of quenched electrodes were better than the unquenched, displaying obvious characterization of slow current response. When applied in DSSC, the sample quenched at-100 °C in ethanol displayed the best performance with Jsc = 4.186 mA/cm2, Voc = 0.781 V, FF = 0.48, η = 1.569 %.
Authors: Nair Gomesh, Syafinar Ramli, M. Irwanto, Y. M. Irwan, M. R. Mamat, U. Hashim, N. Mariun
Abstract: Dye-sensitized solar cell (DSSC) is part of the thin film family that consists of a TiO2 electrode coating which acts as a photo electrode, sensitizer from dye molecules soaked in the TiO2 film, electrolyte layer and a counter electrode. This paper focuses on the usage of a sensitizer from the rose flower and will review some of the research conducted on dye sensitizers from other researcher. Rose flower also known as woody perennial of the genus Rosa, within the family Rosaceae is extracted and were used as sensitizer to fabricate dye sensitized solar cell (DSSC). The photoelectrochemical performance of Rose sensitized solar cell shows parameter of open circuit voltage, VOC, short circuit current, (ISC), fill factor (FF), solar cell efficiency (η), and peak absorbance rate as much as 0.13 V, 57.58 µA, 0.58, 0.85% and 3.5 at 550nm respectively. The photoelectrochemical performance of DSSC and the usage of natural sensitizer from Rose flower dye demonstrate good potential to be applied as a sensitizer yet detail investigations are essential in terms of its applicability for long term application.
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