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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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Integrated Perovskite/Organic Photovoltaics with Ultrahigh Photocurrent and Photoresponse Approaching 1000a??nm
摘要： To enhance photoresponse of common-used perovskite materials in the near-infrared (NIR) region, a fused-ring electron acceptor (F8IC) with strong NIR absorption and high electron mobility was used to blend with a narrow-bandgap polymer donor (PTB7-Th) to construct organic bulk heterojunction (OBHJ), and this OBHJ was then integrated with the perovskite solar cells. The integrated perovskite/OBHJ solar cells exhibit strong photoresponse approaching 1000 nm and an ultrahigh short-circuit current density of 28.2 mA cm-2, which is much higher than the traditional perovskite solar cells and organic solar cells.
关键词： integrated solar cell,perovskite solar cell,ultrahigh photocurrent,NIR photoresponse,organic solar cell
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Impact of Deposition of ITO on Tunnel Oxide Passivating Poly-Si Contact
摘要： In this study, we investigate the impact of the deposition of indium tin oxide (ITO) via DC magnetron sputtering on tunnel oxide passivating poly-Si contacts. Before ITO deposition to the tunnel SiOx passivating n+ poly-Si rear-contact on the cell structure with an SiNx/Al2O3 passivating boron emitter, the implied open-circuit voltage (iVoc) and implied fill factor (iFF) were measured to be 694±10 mV and 83±0.6%, respectively. After ITO sputtering and curing annealing, the iVoc and iFF were almost fully recovered, resulting in the iVoc of 685±11 mV and iFF of 81.9±0.8%. The characteristic of fully recovered effective lifetime is attributed to unique sputtering conditions employing a very low power density at room temperature and curing.
关键词： silicon solar cell,indium tin oxide,transparent conducting oxide,DC magnetron sputtering,tunnel oxide,perovskite,tandem solar cell
更新于2025-09-23 15:19:57
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Novel benzodithiophene type low band gap polymer solar cell application and device stability study with atomic layer deposition encapsulation technique
摘要： Novel benzodithiophene type copolymer was synthesized through a solvent evaporation technique. Poly(5-(5-(4, 8-bis((2-ethylhexyl)oxy)benzo[1,2-b:4, 5-b’]dithiophen-2-yl)thiophen-2-yl)-2, 3-bis(3, 4-bis(decyloxy)phenyl)-8-(thiophen-2-yl) quinoxaline) (P-TQTBDT) solar cells were encapsulated with conventional and Atomic Layer Deposition (ALD) techniques. Characterizations of the samples were carried out via nuclear magnetic resonance (NMR), gel permeation chromotagraphy (GPC) and cyclic voltammetry (CV) techniques. Stability studies were carried out both P3HT and P-TQTBDT solar cells for comparison of commercial P3HT and our novel polymer solar cell. Our results con?rm that ALD is a promising technique for encapsulation of polymer solar cell since stability of P-TQTBDT improved to 72% durability from 38% durability with ALD encapsulation technique during 300 h under AM1.5 G solar irradiation. P-TQTBDT solar cell showed higher stability (about 10%) than P3HT solar cell for both encapsulation methods. We focused on the stability of polymer solar cell can be improved with ALD encapsulation technique. Our aim was to compare P-TQTBDT polymer solar cell with P3HT solar cell. The stability results of P-TQTBDT showed that P-TQTBDT copolymer could be promising polymer to obtain very high stability of polymer solar cells.
关键词： atomic layer deposition,solar cell,stability tests,ISOS stability tests,benzodithiophene,organic 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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Surface Engineering of Low-Temperature Processed Mesoporous TiO <sub/>2</sub> via Oxygen Plasma for Flexible Perovskite Solar Cells
摘要： A major problem in the application of mesoporous TiO2 as an electron transport layer for flexible perovskite solar cells is that a high temperature sintering process is required to remove organic additives from the TiO2 layer. A facile oxygen plasma process is herein demonstrated to fabricate mesoporous structured perovskite solar cells with significant photovoltaic performance at low temperatures. When the low-temperature processed TiO2 layer is modified via oxygen plasma, the organic additives in the TiO2 layer that hinder the charge transport process are successfully decomposed. The oxygen plasma treatment improves the wettability and infiltration of the perovskite layer and also passivates the oxygen vacancy related traps in TiO2. Hence, the oxygen plasma treatment evidently enhances charge extraction and transport, thereby improving photovoltaic performance and decreasing hysteresis.
关键词： Mesoporous TiO2,Flexible solar cell,Oxygen plasma,Low-temperature processed TiO2,Perovskite solar cell
更新于2025-09-23 15:19:57
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High-Efficiency Multiple Quantum Well Triple-Junction Tandem Solar Cell
摘要： This work shows the design of a high-efficiency solar cell in an indium-gallium-arsenide/–gallium-arsenide multiple quantum well (MQW) structure. The main concerns regarding the solar cell are its fabrication complexity, design complexity, and efficiency. Tandem solar cells are designed to absorb the maximum amount of solar energy. In a tandem structure, different positive-negative junctions are responsible for absorbing different portions of the solar spectrum. Besides this, the embedded MQW structure also helps to increase the efficiency of the solar cell. The maximum efficiency of the tandem solar cell in the different material structures is reported to be around 45%–46%. Proper matching of different material parameters such as the lattice-matched semiconductor and thickness of the tandem solar cell can increase the efficiency of the solar cell. This paper introduces a tandem solar cell having an efficiency of around 50%. This comparative study shows the improved performance of the proposed solar cell. A graphical user interface is also developed for solar cell simulation.
关键词： tandem solar cell,multi-quantum well,InGaAs-GaAs,quantum well,Solar cell
更新于2025-09-23 15:19:57
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Analysing consequence of solar irradiance on amorphous silicon solar cell in variable underwater environments
摘要： Harvesting underwater Solar energy using photovoltaic (PV) technology leads to an innovative approach to utilize it in monitoring various underwater sensors, devices, or other autonomous systems using modern-day power electronics. Another huge advantage of placing PV cells underwater comes from the fact that the water itself can provide cooling and cleaning for the cells. Such advantages come with many challenges and constraints due to the underwater spectral change and decrease in Solar radiation with an increase in water depth. In this work, an experimental set-up has been realized to create an underwater environment and further characterized in the indoor environment using the Solar simulator. Moreover, the transfer of Solar radiation through water and the performance of amorphous silicon Solar cell underwater up to 0.2 m has been analysed in changing underwater environments. This investigation shows a better understanding of solar radiation underwater and the amorphous silicon solar cell underwater at shallow depths with considering the water depth up to 0.2 m, salinity 3.5%, total dissolved salts, and other impurities affecting the solar radiation and the performance of amorphous silicon Solar cell in underwater conditions. In addition to that, the maximum power output Pmax of amorphous silicon Solar cell is 0.0367 W at 0.2 m in the case of DI water. In contrast, in real seawater and artificial seawater with 3.5% salinity, it shows 0.0337 W and 0.0327 W, respectively.
关键词： water salinity,amorphous silicon Solar cell,photovoltaic (PV) technology,underwater Solar energy,Solar radiation,PDMS (polydimethylsiloxane)
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Angular Dependence of Textured Bifacial Silicon Heterojunction Solar Cells for High Latitudes
摘要： Bifacial photovoltaics at high latitudes can achieve up to 25-45% bifacial gain due to high-albedo snow cover and high proportion of diffuse light. We studied the angular performance of bifacial silicon heterojunction solar cells with various textures to understand high-latitude effects on optical losses. For cone and pyramid-patterned designs, efficiency decreases at high angles, primarily due to increased reflectivity, although longer path length through front-surface films also increases UV losses for all surface types. At 80° incidence and 25°C, a <7% reduction in short-circuit current due to change in external quantum efficiency is observed for random pyramid textured surfaces. Simulation is compared to measured external quantum efficiency for a silicon heterojunction cell, and similar trends are observed with increasing angle of incidence. A relative reduction of <1% in short-circuit current is also observed when moving from an air mass of 1.5 to 5 at high angles of incidence. These results will inform future solar heterojunction designs for this application and be applied to refine annual energy yield calculations.
关键词： photovoltaic cells,bifacial photovoltaics,indium-tin-oxide,amorphous silicon,ray tracing,silicon solar cell,texture,angle of incidence,heterojunction cell,air mass
更新于2025-09-23 15:19:57
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Investigation of Non-ideality Factors for a P3HT: PCBM Based Bulk Heterojunction Organic Solar Cell in Presence of Silver Nanoparticles
摘要： Solar cells are a potential option to meet the growing energy requirements of humans. Organic solar cells (OSCs) represent a class of solar cells that is a part of the third generation solar cell technology. The quest for obtaining enhanced OSC efficiencies has led to the incorporation of metallic nanoparticles (NPs) in the OSCs. Metallic NPs increase the incident light absorption instances, thus increasing the obtainable cell efficiencies. Different parameters and factors need to be considered for obtaining the optimum NP specifications. Investigations of the mechanism of light absorption after the introduction of NPs in the OSC are critical. Hence theoretical simulations for such OSCs are important. An overview of the different solar cell characterization techniques is presented in this paper. Simulations are carried out for these characterization techniques to study the behavior of the P3HT:PCBM based OSC in which silver NPs are incorporated in the active layer. The simulations are carried out for the cell structure in the presence of different non-ideality factors. The non-idealities include mobility limitations, presence of traps, recombination losses, low generation, presence of non-ideal values of series and shunt resistances, the effect of doping, etc. The simulated characterization techniques can be utilized for the performance study and parameter extraction of these NP incorporated OSCs.
关键词： Absorption,Metallic nanoparticles,Active layer,Bulk heterojunction,Cell characterization,Organic solar cell
更新于2025-09-23 15:19:57