Tandem solar cells can exceed the single junction practical and thermodynamic limits.
Ĭurrent commercial photovoltaic technologies are close to their practical limits, and enhancing their power conversion efficiency (PCE) requires a paradigm shift to tandem approaches. INTERFACE OPEN-CIRCUIT VOLTAGE DEFICIT IN CU(IN,GA)S2 SOLAR CELL: CHARACTERIZATION, SIMULATION AND MITIGATION Sood, MohitĬurrent commercial photovoltaic technologies are close to their practical limits, and enhancing their power conversion efficiency (PCE) requires a paradigm shift to tandem approaches. This study helps to a better understanding of the interface electrostatics and its role in the charge injection mechanism of solid-state DSCs. The simulations were carried out for different electronic trap densities in TiO2 and different doping levels in the Spiro-OMeTAD hole-transport layer. The built-in electric field leads to change in the energetics at the dye/TiO2 interface, leading to poor charge injection from excited dye into TiO2. We find that interface traps located below the conduction band edge of mesoporous TiO2 influence the accumulation of photogenerated holes and built-in electric field near the interface. After that, we use first-principles DFT modeling of dye-sensitized interfaces in the presence of the calculated electric fields. In our three-dimensional drift-diffusion model, we solve a set of drift-diffusion equations coupled to Poisson equation for electrons, holes, doping impurities, and interface traps simultaneously. In this work, we present a drift-diffusion and density functional theory (DFT) study of solid-state DSCs to investigate the electrostatics at the TiO2/organic dye/Spiro-OMeTAD interface and its impact on the adsorbed dye energy levels, its absorption spectrum, and the related charge injection.
Replacing liquid electrolyte with a solid semiconducting material leads to poor interfacial contacts, hence the interface electrostatics becomes one of the limiting factors. Liquid-electrolyte-based DSCs suffer from low stability, electrolyte leakage, and, in some cases, electrode corrosion. In a DSC, due to interfaces between the dye and the chargetransport materials, the interface electrostatics becomes a key factor determining the overall performance of the cell. ĭye-sensitized solar cells (DSCs) have gained great attention in recent years due to their low-cost fabrication, flexibility, and high power conversion efficiency. In The Journal of Physical Chemistry C (2019)ĭye-sensitized solar cells (DSCs) have gained great attention in recent years due to their low-cost fabrication, flexibility, and high power conversion efficiency. Gravilux was first released as a work of interactive art by Scott Sona Snibbe that was only available in galleries and museums that became a best-selling hit on iOS, and inspired Björk to work with him and his studio on the first App Album: Biophilia.Interface Electrostatics of Solid-State Dye-Sensitized Solar Cells: A Joint Drift-Diffusion and Density Functional Theory Study Singh, Ajay Radicchi, Eros Fantacci, Simona et al Multiple fingers and multiple people can touch the screen at once, collaborating or competing. You can change parameters including gravity and number of stars, and enable antigravity, color, make gravitational typography, and upload to Facebook, Twitter, and email. You can color the stars by their speed, and make them dance to music. You can tease and twist the particles into galaxies, or explode them like a supernova. As you touch the screen, gravity draws simulated stars to your fingertips. Gravilux lets you draw with stars: it’s a combination of painting, animation, art, science, and gaming. **iTunes Top 10 App of the year for Art and Music and #1 Entertainment App** "Of the millions of apps out there, none quite capitalize on the sheer fun and beauty of interactivity the way that Scott Snibbe’s do.” -CoolHunting
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