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TiO 2 nanoparticles (NPs) with a size of 240 nm (T240), used as a light-scattering layer, were applied on 25-nm-sized TiO 2 NPs (T25) that were used as a dye-absorbing layer in the photoelectrodes of dye-sensitized solar cells (DSSCs). Api 941 Latest Edition Of Internet. In addition, the incident light was concentrated via a condenser lens, and the effect of light concentration on the capacity of the light-scattering layer was systematically investigated.

At the optimized focal length of the condenser lens, T25/T240 double layer (DL)-based DSSCs with the photoactive area of 0.36 cm 2 were found to have the short circuit current ( I sc) of 11.92 mA, the open circuit voltage ( V oc) of 0.74 V, and power conversion efficiency (PCE) of approximately 4.11%, which is significantly improved when they were compared to the T25 single layer (SL)-based DSSCs without using a solar concentrator (the corresponding values were the I sc of 2.53 mA, the V oc of 0.69, and the PCE of 3. Motion Graphics Book Pdf. 57%). Thus, the use of the optimized light harvesting structure in the photoelectrodes of DSSCs in conjunction with light concentration was found to significantly enhance the power output of DSSCs. Dye-sensitized solar cells (DSSCs) have been developed extensively because of the relatively low cost involved in their manufacturing processes [ ].

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Numerous research groups have reported the enhancement of the light-to-electricity power output of DSSCs by employing newly developed materials and modifying the intrinsic solar cell structures [ – ]. An alternative approach for enhancing the light-to-electricity power output of DSSCs is to use a solar concentrator, which generally employs optical lenses or mirrors [, ]. The optical lens is incorporated to improve the power output of photovoltaic cells (PVs) by concentrating a large amount of sunlight onto a small area of photoactive layers in various PVs. In general, the power output of DSSCs decreases with an increase in the cell area of the photoactive layer. However, this problem can be solved by employing a solar concentrator that provides the advantages of increased power output.

The application of an optical lens-based solar concentrator system mounted on top of DSSCs still poses several challenges in terms of efficiency, cost-effectiveness of optical design, and the provision of uniform and concentrated illumination on a DSSC regardless of surrounding environmental changes [ – ]. Furthermore, various complex phenomena, including light scattering, recombination of electron-hole pairs, and dye degradation, in the photoactive layers of DSSCs can occur when the intensity of incident light is changed by varying the beam focus of solar concentrator [ ]. The question arises as to how we can optimize the effects of the intrinsic cell structure and solar concentrator when concentrated light is incident on the photoactive layer structures in DSSCs. In this work, we systematically investigated the effects of using a light-scattering layer in the photoelectrodes of DSSCs along with studying the effects of using a condenser lens-based solar concentrator on the photovoltaic performance of DSSCs. Briefly, three different photoelectrode structures fabricated with a T25/T25-accumulated double layer (T25/T25 DL), a T25/T240-accumulated double layer (T25/T240 DL), and a T240/T240-accumulated double layer (T240/T240 DL) were examined for verifying the effects of using a light-scattering layer under intensified light irradiation conditions tuned by a condenser lens-based solar concentrator. Here, T25 and T240 indicate commercialized TiO 2 nanoparticles (NPs) with an average diameter of approximately 25 and 240 nm, respectively. With the optimized design of the condenser lens-based solar concentrator developed in this approach, we report a novel T25/T240 DL-based DSSC system with condenser lens-based solar concentrator that exhibits a photocurrent output of approximately 11.92 mA, an open circuit voltage of 0.74 V, and power conversion efficiency (PCE) of approximately 4.11%, which exhibits a much better photovoltaic performance compared to T25/T25 DL- and T240/T240 DL-based DSSCs with condenser lens-based solar concentrator.