Papers by Keyword: Dye Sensitized Solar Cell (DSSC)

Abstract: Among all the solar cell system dye sensitized solar cell is the third-generation solar cell that contains working electrode coating with semiconducting material, dye sensitizer, counter electrode and the efficiency of dye sensitized solar cell is reliant on the material which is absorbing light and converting it as energy. In this respect, dye sensitizer is the most substantial component in dye sensitized solar cell. Though organic and natural dye has been used in solar cell but due to the deleterious effect of organic dye, its application has been suppressed by the natural dye which is environment friendly and accessible. Ample of natural dyes has been applied in solar cell as sensitizer, while their way of application is different especially in case of dye extraction process. In this theoretical analysis, various research work related to dye sensitized solar has been included and explained the working principle of dye sensitized solar cell (DSSC), also summarized the extraction process of natural dye from different along with their photovoltaic parameters of various natural dye sensitized solar cell. Moreover, this study also compares the performance of natural dye sensitized solar cell according to presence of chromophore group in natural pigment.

Abstract: Organic compound containing thiosemicarbazide moiety has been successfully synthesized. The new synthesized dyes, N-(3-(Trifluoromethylbenzaldehyde)benzylidine thiosemi- carbazide (3-TFT) was characterized by spectroscopic technique namely, CHNS elemental analysis, Fourier Transform Infra-Red analysis (FT-IR), UV-Visible analysis (UV-Vis), ¹H and ¹³C Nuclear Magnetic Resonance (NMR). The thin films of this dye have been prepared using a spin coating technique and deposited on indium tin oxide (ITO) glass substrate. The main highlight was an electrical conductivity of thin films which was measured using four point probing system in a range of light intensity, 25 Wm^-2 until 200Wm^-2. The potential electrical conductivity of 3-TFT dye was found gradually increased until reached the maximum conductivity values of 0.1489 Scm^-1 at light intensity of 100 Wm^-2 in the most diluted concentration at 1x10^-5M.

Abstract: Ruthenium(II) complexes were synthesized and characterized for dye-sensitized solar cells (DSSCs) with varied alkyl chains specifically methyl (PC01), hexyl (PC02) and octyl (PC03). The photophysical property was studied by UV-Visible absorption. The results showed that the main absorption peaks were asigned to the metal to ligand charge transfer (MLCT) transition (350-600 nm). The incident photon to current conversion efficiency (IPCE) covered the entire visible spectrum reaching to 18-20% at 520 nm. The DSSC performances were investigated with liquid iodide/tri-iodide electrolyte under standard AM 1.5. PC01-PC03 showed that the power conversion efficiency (h) were obtained at 3.08%, 3.18% and 3.14%, respectively, compared with N719 (7.80%). Interestingly, PC02 and PC03 showed the long term stability with %h_loss better than the standard up to 1000 h.

Abstract: The four thiocyanate free ruthenium(II) complexes; [Ru(N^N)₂(C^N)]PF₆ were synthesized and characterized for dye sensitized solar cells (DSSCs). The results showed that the broad absorptions covered the visible region from metal to ligand charge transfer (MLCT) were obtained with the main peaks at 560, 490 and 400 nm. The materials were studied DSSC performance under standard AM 1.5. Compound PP1 showed the power conversion efficiency (PCE) at 3.10%, with a short-circuit photocurrent density (J_sc) of 7.99 mA cm^-2, an open-circuit photovoltage (V_oc) of 563 mV and a high fill factor (ff) of 0.690.

Abstract: In order to overwhelm the electrolyte leakage problem and improve the stability in extreme climate conditions, we have studied the fabrication and characteristics of dye sensitized solar cell (DSSC) using polymer gel electrolyte (PGE), which is developed from siloxane based polymer gel blended with imidazolium ionic liquid. In many cases, the use of PGE often reduces its photovoltaic performance due to the decrease in its ionic mobility. However, such influence was not observed in our present work. In this work, the fabricated DSSC do not exhibit significant degradation in its working performance. The best overall energy conversion efficiency is about 5.25%, as indicated by short circuit photocurrent (J_sc) larger than 12 mA/cm², which is comparable to performance of reference cell made by using ionic liquid only. We found from the impedance spectroscopy measurements that the electrolyte diffusion coefficient in the DSSC using this PGE is comparable to that in DSSC using ionic liquid electrolyte.

Abstract: A nitrogen-doped titania nanoparticle film on an ITO substrate was successfully obtained by gas phase method. Such a nitrogen-doped titania nanoparticle film on an ITO substrate shows efficient at the responsivity under the visible light exposure. TiO₂ photo-anode with N-doped was fabricated using nanocrystalline pastes and their N719-sensitization led to a short-circuit photocurrent density of 3.95 mA/cm² and a solar energy conversion efficiency of 1.72% under air-mass 1.5 global and illumination with the intensity of 100 mW/cm² (AM 1.5G, 100 mW/cm²).

Abstract: ZnO was a promising n-type conductive semiconductor material for dye-sensitized solar cells. Stable and efficient preparation of high quality p-type ZnO films became the main difficulty in current research. In this paper, a nitrogen-doped ZnO columnar film on an indium tin oxide (ITO) substrate was successfully obtained by gas phase method. The absorption of visible light was improved by nitrogen-doped ZnO columnar films. This experiment provided a good strategy for the full utilization of solar energy.

Abstract: The paper shows the first results of the optical performance analysis carried out on the DSSC integrated glassblock, an innovative building product developed at the Department of Architecture of the University of Palermo. In the field of a research that is being conducted in order to define innovative solutions for the construction of photovoltaic and energy efficient translucent building envelopes, different hypotheses of integration of DSSC into the glassblock have been foreseen. The integration of glassblock with third generation PV systems allows to define a novel building-PV product that meets the current requirements of the BIPV (Building Integrated Photovoltaics) market. By means of OptiCAD® software, several numerical simulations were conducted to analyse the solar factor, the light transmittance and the shading coefficient of the device.

Abstract: This project is to investigate the counter electrode material from two different carbon sources to fabricate dye sensitized solar cell (DSSC). The carbon sources are extracted from battery and pencil lead. The method to prepare the DSSC is through the conventional Dr.Blading method. The same method is also used for the counter electrode which uses carbon from recycle batteries, the carbon from pencil lead are scribbled onto the ITO glass to get a uniform coating. Both thickness of the counter electrode vary accordingly. The solar cells are then placed under outdoor solar irradiation and the output is taken every 10 minutes. Based on observation, the solar cells which have the carbon from batteries shows higher cell efficiency which is 8.2 % with lower FF of 0.78, compared to by using the pencil lead, the cell efficiency is only 7.23% but with a higher FF of 0.93.

Abstract: Diatomite/TiO₂ composite films were prepared with diatomite and P25 TiO₂ nanoparticles on conductive glass substrates. The surface morphology and phase composition of the film were characterized with scanning electron microscopy (SEM) and X ray diffraction (XRD). It is concluded that diatomite doped into the film will form granular cores. Dye sensitized solar cells (DSSC) were fabricated with the diatomite/TiO₂ composite film as anode, and the photoelectric properties of the cells were tested. Results show that the doping of diatomite can significantly increase the open circuit voltage and short circuit current of DSSC. Optimized photoelectric properties can be acquired as 1.3 percent diatomite doped in TiO₂ film.