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Optimization of CH3NH3PbI3 perovskite solar cells: A theoretical and experimental study
摘要： In this work, an experimental and theoretical study on CH3NH3PbI3 perovskite solar cells was performed. A theoretical validation of experimental results in perovskite solar cells with e?ciencies of 13.32% is presented. An optimization study which involves the spiro-OMeTAD and perovskite thickness’ in?uence on electrical output parameters (Voc, Jsc, FF and PCE) showed a promotion of solar cell e?ciency to 15.50% under 100 nm and 400 nm for hole transport material and absorber, respectively. The importance of the di?usion length of the absorber is discussed. In order to enhance the e?ciency, a study of defect density (NT) was applied at the range of 1016 cm?3 (experimental) to 1010 cm?3 (theoretical) where we achieved an e?ciency of 20.26%. The present work illustrates the importance of thickness optimization and the reduction of defect density (by the improvement of the quality of processed ?lm) to obtain a better performance of this type of solar cell. Furthermore, the relevance of the implementation of a back contact with higher work function was studied.
关键词： SCAPS,Perovskite solar cell,Modeling solar cell,Optimization solar cell
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC) - Santos, Brazil (2019.12.1-2019.12.4)] 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC) - On the Influence of Area Variations of the Photovoltaic ;Surface in Solar Cell Antennas
摘要： Some low power applications where antennas and solar cells are integrated into the same system have limitations and requirements imposed by the radiation characteristics that, usually, are ful?lled by varying solar cell physical parameters. The negative in?uences of those variations are not profoundly discussed in the literature that studies the extremely low-power systems, where radiofrequency and photovoltaic devices share the same structure. In this context, this work models a photovoltaic cell used as an antenna and analyzes the consequences of the solar cell area variation, imposed by the fabrication process of the radiating element. The parameters of the one-diode equivalent circuit model are extracted and used to simulated the I-V curves for different irradiance levels, validating the simulations with experimental measurements performed in the laboratory. Also, the solar cell ?ll factor, energy conversion ef?ciency, and current density are analyzed.
关键词： low power devices,Solar cell modeling,energy harvesting,solar cell and antenna integration
更新于2025-09-23 15:19:57
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Fundamental Aspects Concerning the Validity of the Standard Equivalent Circuit for Large‐Area Silicon Solar Cells
摘要： The standard equivalent circuit of a solar cell amounts to a lumped description by separate diode and resistor elements. Since its application to a large-area silicon solar cell effectively implies averaging the emitter resistance which, however, is closely coupled to the p–n junction, it is not self-evident that it works more or less well. Using an analytically solvable distributed series resistance model and systematically treating the deviations from the ideal case of zero emitter resistance, the equivalent circuit is found in linear order in the sheet resistivity. In this linear order, the lumped voltage losses are fully compatible with the integrated Joule losses; this compatibility turns out to be a necessary and sufficient condition for modeling the local series resistance of a large-area silicon solar cell. In higher orders of the sheet resistivity, however, the lumped voltage losses are not compatible with the integrated Joule losses, which means that the equivalent circuit cannot describe these higher orders. The equivalent circuit resulting from the linear-order lumped series resistance accounts for the experimentally observed variation of the lumped series resistance along the current–voltage characteristic, which turns out to be fully described by a dependence on the dark diode current only.
关键词： Joule losses,equivalent circuit,solar cell modeling,voltage losses,local series resistance
更新于2025-09-12 10:27:22