Listar por tema "photovoltaics"
Mostrando ítems 1-20 de 20
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Ballistic-like space-charge-limited currents in halide perovskites at room temperature
American Institute of Physics (2021-12-13)The emergence of halide perovskites in photovoltaics has diversified the research on this material family and extended their application toward several fields in the optoelectronics, such as photo- and ionizing-radiation ... -
Capacitive dark currents, hysteresis, and electrode polarization in lead halide perovskite solar cells
American Chemical Society (2015-04)Despite spectacular advances in conversion efficiency of perovskite solar cell many aspects of its operating modes are still poorly understood. Capacitance constitutes a key parameter to explore which mechanisms control ... -
Diffusion-Recombination Impedance Model for Solar Cells with Disorder and Nonlinear Recombination
Wiley-VCH (2013-09-23)The diffusion–recombination model is a key tool in understanding the photovoltaic operation of solar cells. Dye-sensitized solar cells, organic solar cells, and inorganic semiconductor solar cells are systems affected by ... -
Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
American Institute of Physics (2020-05-05)A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the ... -
Enhanced Open-Circuit Voltage of Wide-Bandgap Perovskite Photovoltaics by Using Alloyed (FA1–xCsx)Pb(I1–xBrx)3 Quantum Dots
American Chemical Society (2019-07-16)We report a detailed study on APbX3 (A=Formamidinium (FA+), Cs+; X=I-, Br-) perovskite quantum dots (PQDs) with combined A- and X-site alloying that exhibit, both, a wide bandgap and high open circuit voltage (Voc) for the ... -
Enhanced operational stability through interfacial modification by active encapsulation of perovskite solar cells
AIP Publishing (2020)Encapsulates are, in general, the passive components of any photovoltaic device that provides the required shielding from the externally stimulated degradation. Here we provide comprehensive physical insight depicting a ... -
From Flat to Nanostructured Photovoltaics: Balance between Thickness of the Absorber and Charge Screening in Sensitized Solar Cells
American Chemical Society (2012-01)Nanoporous metal oxide electrodes provide a high internal area for dye anchoring in dye-sensitized solar cells, but the thickness required to extinguish the solar photons also enhances recombination at the TiO2/electrolyte ... -
General Working Principles of CH3NH3PbX3 Perovskite Solar Cells
American Chemical Society (2014)Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy ... -
Large grain size with reduced non-radiative recombination in potassium incorporated methylammonium-free perovskite solar cells
Elsevier (2022-12-31)Organic–inorganic hybrid halide perovskites are widely considered to be one the most promising material in photovoltaic technology, the use of this semiconductor as absorbent layer in solar cells has attracted considerable ... -
Light-Induced Space-Charge Accumulation Zone as Photovoltaic Mechanism in Perovskite Solar Cells
American Chemical Society (2016)We fabricated formamidinium lead iodide perovskite solar cell for analysis of the photovoltaic mechanism based on the interpretation of the capacitance variation under illumination. It was shown that the low-frequency ... -
Limited information of impedance spectroscopy about electronic diffusion transport: The case of perovskite solar cells
American Institute of Physics (2022)Impedance Spectroscopy (IS) has proven to be a powerful tool for the extraction of significant electronic parameters in a wide variety of electrochemical systems, such as solar cells or electrochemical cells. However, ... -
Partial coverage methylammonium lead bromide films for solar cell application
Elsevier (2019-11-30)Hybrid perovskite compounds as methylammonium lead halides are currently been investigated for different optoelectronic applications. CH3NH3PbBr3 is a promising member because of its electronic structure and large bandgap ... -
Photovoltaic Glass Waste Recycling in the Development of Glass Substrates for Photovoltaic Applications
MDPI (2023)Because of the increasing demand for photovoltaic energy and the generation of end-of-life photovoltaic waste forecast, the feasibility to produce glass substrates for photovoltaic application by recycling photovoltaic ... -
Quasi-Z-Source Inverter-Based Photovoltaic Power System Modeling for Grid Stability Studies
MDPI (2021-01-19)Quasi-Z-source inverters (qZSIs) are becoming a powerful power conversion technology in photovoltaic (PV) power systems because they allow energy power conversion in a single stage operation. However, they can cause ... -
Role of the Selective Contacts in the Performance of Lead Halide Perovskite Solar Cells
American Chemical Society (2014-01)The effect of electron- and hole-selective contacts in the final cell performance of hybrid lead halide perovskite, CH3NH3PbI3, solar cells has been systematically analyzed by impedance spectroscopy. Complete cells with ... -
Single Step Deposition of an Interacting Layer of Perovskite Matrix with Embedded Quantum Dots
Royal Society of Chemistry (2016)Hybrid lead halide perovskite (PS) derivatives have emerged as very promising materials for the development of optoelectronic devices in the last few years. At the same time, inorganic nanocrystals with quantum confinement ... -
State of the Art and Prospects for Halide Perovskite Nanocrystals
American Chemical Society (2021-06-17)Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics ... -
Tin perovskite solar cells with >1,300 h of operational stability in N2 through a synergistic chemical engineering approach
Elsevier (2022-03-14)Despite the promising properties of tin-based halide perovskites, one clear limitation is the fast Sn+2 oxidation. Consequently, the preparation of long-lasting devices remains challenging. Here, we report a chemical ... -
Unique Curve for the Radiative Photovoltage Deficit Caused by the Urbach Tail
American Chemical Society (2021-08-12)The photovoltage Voc of high-performance solar cells such as GaAs and metal halide perovskites is affected by the exponential Urbach tail in the absorption spectrum, with an energy parameter EU. It has been observed ... -
α-FAPbI3 powder presynthesized by microwave irradiation for photovoltaic applications
Elsevier (2022-12-10)The development of up-scalable and high-throughput methodologies to fabricate high-efficiency lead halide perovskite solar cells (PSCs) based on α-phase formamidinium lead iodide (FAPbI3) is one of the main challenges of ...