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Preparation and Thickness Optimization of TiO 2 /Nb 2 O 5 Photoanode for Dye Sensitized Solar Cells
摘要： In recent years, dye-sensitized solar cells (DSSCs) have received much attention as an alternative to silicon-based solar cells due to their various advantages. It is one of the possible options for large-scale roll-to-roll production of photovoltaic cells, on flexible plastic or glass substrates. Nonetheless, due to technical constraints, the maximum efficiency is only half the efficiency of conventional solar cells. Therefore improving the efficiency of DSSC technology is critical for widespread adoption. This work will attempt to summarize the influence of adding mesoporous Nb2O5 nanoparticle in different percentage of weight to TiO2 photoanode. Prepared TiO2/Nb2O5 nanocomposites are characterized using UV-Vis absorption spectroscopy, XRD and FESEM. DSSCs are fabricated and studied for their photovoltaic performance under the illumination of simulated sunlight of 100mWcm-2. Adding Nb2O5 nanoparticles has resulted in an increase of short-circuit current density (Jsc) and efficiency (η) significantly. Also, an attempt has been made to optimize the film thickness by studying efficiency as a function of film thickness. The cell with 24μm thick electrode emerges as an optimized cell with remarkable performance.
关键词： desorption,TiO2/Nb2O5,DSSCs,thickness optimization,TiO2
更新于2025-09-12 10:27:22
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Guideline for Optical Optimization of Planar Perovskite Solar Cells
摘要： Organometallic halide perovskite solar cells have emerged as a versatile photovoltaic technology with soaring efficiencies. Planar configuration, in particular, has been a structure of choice thanks to its lower temperature processing, compatibility with tandem solar cells, and potential in commercialization. Despite all the breakthroughs in the field, the optical mechanisms leading to highly efficient perovskite solar cells lack profound insight. In this paper, a comprehensive guideline is introduced involving semianalytical equations for thickness optimization of the front and rear transport layers, perovskite, and transparent conductive oxides to improve the antireflection and light trapping properties, and therefore to maximize the photocurrent of perovskite solar cells. It is shown that a photocurrent enhancement above 2 mA cm?2 can be achieved by altering—reducing or increasing—the thicknesses of the layers constituting a CH3NH3PbI3 (MAPI) type perovskite solar cell. The proposed guideline is tested against experiments as well as previously published experimental and simulation results for MAPI. Additionally, the provided guideline for various types of perovskites can be extended to other direct bandgap absorber-based solar cells in superstrate configuration.
关键词： perovskite solar cells,light trapping,planar solar cells,antireflection,thickness optimization,optimization guideline,optical modeling
更新于2025-09-11 14:15:04