- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Transparent Platinum Counter Electrode Prepared by Polyol Reduction for Bifacial, Dye-Sensitized Solar Cells
摘要： Pt catalytic nanoparticles on F-doped SnO2/glass substrates were prepared by polyol reduction below 200 °C. The polyol reduction resulted in better transparency of the counter electrode and high power-conversion efficiency (PCE) of the resultant dye-sensitized solar cells (DSSCs) compared to conventional thermal reduction. The PCEs of the DSSCs with 5 μm-thick TiO2 photoanodes were 6.55% and 5.01% under front and back illumination conditions, respectively. The back/front efficiency ratio is very promising for efficient bifacial DSSCs.
关键词： dye-sensitized solar cell,platinum,bifacial,ethylene glycol,counter electrode
更新于2025-11-21 11:01:37
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A model to evaluate the effect of shading objects on the energy yield gain of bifacial modules
摘要： Bifacial modules become popular due to the backside yield gain, which can reduce the levelized cost of energy (LCOE) of photovoltaic system dramatically; the technical development of bifacial cell and double glass module technology are also important for the explosion of bifacial market. More and more people are attracted by the energy yield gain of bifacial modules; however, only little studies focus on the effect of backside shading objects on the module and system that would influence the energy yield gain. In this paper, an optic model is developed to evaluate the effect of the shading objects. The energy loss by the shading objects is also estimated by simulation and experiment. The result shows that when the shading objects are 40 mm vertical away from the modules, the shading effect could be greatly reduced. The frame height of bifacial modules should be smaller to reduce the shading effect by frames. It is better to remove the surface C of the frames to optimize the energy yield ability of bifacial modules.
关键词： Bifacial modules,Self-shading
更新于2025-09-23 15:23:52
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Energy yield prediction of a bifacial PV system with a miniaturized test array
摘要： Because of the sensitivity on multiple additional factors, compared to monofacial standard installations, the simulation and prediction of a bifacial PV arrays yield is by far more complicated and less reliable. Accordingly, the determination of optimized installation conditions is considerably less straightforward for bifacial installations. Due to the pronounced dependencies also the assignability of otherwise applied installation conditions to similar systems is limited. Because of the low accuracy of the traditional approaches to predict the bifacial system output the use of a miniaturized test rig might be an interesting option. Provided that the results can be assigned to measurements at real systems it can be used as a cheap and flexible testing device. Miniaturized devices could be used in long-term trials for yield measurements at specific locations, to identify optimum installation conditions or to validate simulation algorithms. Running several test rigs with different configurations in parallel would enable a direct comparison. The small size of a miniaturized rig also allows a fast change of the set-up, which is an interesting feature to test the respective impact at otherwise almost unchanged conditions in short-term tests. In this paper we report on a test device which is a miniaturized (1:12) replica of an existing PV array with commercial bifacial modules. The measurement data of both systems are compared in order to investigate if there is a clear assignability. A unique feature of the large test field, a permanent and automated variation of the tilt angle, is also transferred to the miniaturized version. Accordingly, the whole tilt angle range is tested and potential tilt angle dependent effects are revealed. Based on the obtained data we give an estimation of the error in the prediction accuracy and discuss options for possible improvements.
关键词： Energy yield prediction,Bifacial,Tilt angle,Test system
更新于2025-09-23 15:22:29
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The mathematical and experimental analysis on the steady-state operating temperature of bifacial photovoltaic modules
摘要： The operating temperature of bifacial photovoltaic (PV) module affects its power generation and reliability. Combined with view factor model of ground reflectivity on module backside, a thermal steady-state model is established to analyze the thermal performance of bifacial module in this paper. The module operating temperatures under three different installation conditions of roof cement ground, water surface and grassland are calculated and simulated by ANSYS software, and the experiments are designed to analyze and verify it. Based on the difference of reflectivity and heat capacity of different ground for the PV module installation, the effects of ground type and module material on bifacial module temperature and its mechanism are analyzed quantitatively. According to the simulation and experiment results, the operating temperatures of the bifacial modules installed on the roof cement ground, water surface and grassland are 44.7 (cid:1)C, 41.5 (cid:1)C, 43.2 (cid:1)C respectively, under the setting environment condition with specific irradiance, wind speed and ambient temperature. The temperature difference of 1.7 (cid:1)C e3.2 (cid:1)C is caused by ground reflectivity and temperature. The operating temperature difference between glass-glass and glass-backsheet module is less than 0.4 (cid:1)C under the standard condition. The conductivity and emissivity of encapsulation material does not show strong influence on module operating temperature.
关键词： Bifacial PV module,Solar cell,Ground reflectivity,Operating temperature
更新于2025-09-23 15:21:01
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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) - Recombination Behaviour of Passivated Emitter and Rear Cell (PERC) Bifacial Silicon Solar Module under Different Illuminations
摘要： Bifacial silicon solar module has received considerable attention in recent years due to increasing the performance of photovoltaic plants. The passivated emitter and rear cell (PERC) bifacial silicon solar cell reduces contact improves open-circuit voltage and cell recombination, and performance. In this paper, recombination behaviour of passivated emitter and rear cell (PERC) bifacial silicon solar module under different illuminations was investigated. It is found that the J01 of bifacial PERC solar module decreases with increasing irradiance intensity, and the J02 is nearly constant from low injection to high injection. This shows that the PERC bifacial silicon solar module has more advantage in the field compared to Al-BSF solar module.
关键词： PERC,bifacial,irradiance intensity,recombination behaviour
更新于2025-09-23 15:21:01
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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) - Bifacial Performance Modeling in Large Arrays
摘要： Bifacial modules are being deployed at large PV systems, because of the potential to increase energy output, but their performance is still uncertain, increasing financial risk. To address the opportunity that bifacial modules present, we have developed a bifacial performance model and integrated it into a full PV system model to estimate the backside irradiance, combine it with the front side, and predict the total output power. To understand the effect of bifacial on performance, the NIST test array was simulated with bifacial modules and compared to an equivalent monofacial system while varying tilt from 20° to 40°. A bifacial gain of 10% was observed which increased with increasing tilt angle. The maximum yield occurred at 30° for the bifacial system, but at 25° for the monofacial system, demonstrating the advantage of modeling bifacial systems to optimize their performance.
关键词： view factor,bifacial,system performance,shading
更新于2025-09-23 15:21:01
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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) - Performance characterization for bifacial photovoltaic modules
摘要： The performance of bifacial photovoltaic modules were characterized. The optical transmittance was measured for front and back side illumination. The temperature coefficients were obtained in order to predict the real power that can be produced in an installation under operating conditions. The internal quantum efficiency distribution was measured to distinguish recombination activity which occurred at the silicon via two-dimensional LBIC method.
关键词： optical transmittance spectra,temperature coefficient,bifacial perc solar cells,quantum efficiency
更新于2025-09-23 15:21:01
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Measurement setup for differential spectral responsivity of solar cells
摘要： We have developed a setup for measuring differential spectral responsivities of unifacial and bifacial solar cells under bias light conditions. The setup uses 30 high-brightness LEDs for generating a quasi-monochromatic light source covering the wavelength range 290–1300 nm. Halogen lamps are used to generate bias-lighting conditions up to the irradiance level of 1000 W/m2. The setup has been fully characterized for spectral irradiances and spatial uniformities of all light sources. Validation measurements carried out using a reference cell of 2 × 2 cm2 area from Fraunhofer ISE demonstrated an agreement better than 2% over the wavelength range of 425–940 nm, with an expanded uncertainty of 2.6%. In the UV and IR regions, the discrepancies are higher but still within estimated uncertainties. The setup is also tested in measuring spectral responsivities of large 15 × 15 cm2 bifacial solar cells. The associated problems are discussed.
关键词： Radiometry,Bifacial,Solar cell,Spectral responsivity,Electricity,Efficacy
更新于2025-09-23 15:21:01
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Fabrication of bifacial sandwiched heterojunction photoconductor a?? Type and MAI passivated photodiode a?? Type perovskite photodetectors
摘要： In this work, we report novel heterojunctions perovskite photodetector architecture utilizing metal-free contact electrodes. The metal-free contact electrodes were exploited to fabricate photoconductor – type perovskite photodetector. The attempt to investigate the effect of passivating the active layers of the as – proposed architecture with electrolytic MAI gave rise to a photodiode – type perovskite photodetector. These two photodetector types are sensitive and responsive to light sources through their dual transparent electrodes faces (N-face and T-face). We also showed that passivating the surfaces of the sandwiched perovskite layers with MAI solution improves the performance of the fabricated photodetectors, where the detectivity is enhanced by a factor of hundred compared to non-passivated devices. The proposed photodetectors architectures demonstrate champion dual-detectivity (1.77×1014 Jones for N-face and 4.64 × 1014 Jones for T-face), dual-responsivity (1.94 × 103 A/W for N-face and 1.61 × 103 A/W for T-face) and high dual – sensitivity (3.3 × 102 for N-face and 1.1 × 102 for T-face). All these properties were obtained from the two faces of the MAI passivated photodetectors under 0.02 mW/cm2 red LED illumination and at -2.0 bias voltage. This novel architecture may scale up towards building energy and cost efficient classes of optoelectronic and photovoltaic devices which are responsive to light in two directions.
关键词： MAI Passivation,Bifacial,Photoconductor,Perovskites,Photodetectors,Photodiode
更新于2025-09-23 15:21:01
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Computational study of stack/terminal topologies for perovskite based bifacial tandem solar cells
摘要： With the rapid progress on perovskite (PVK) and bifacial solar cells, there is a huge interest in integrating PVK with established technologies such as crystalline silicon (c-Si) and CIGS for bifacial tandem structures. Here we use self-consistent optical/electrical simulations to compare various stack/terminal configurations for bifacial tandem solar cells having PVK as the top cell. In particular, we compare a non-conventional three-terminal four-junction (3T-4J) twin bifacial tandem configuration with standard two-junction bifacial tandem structures having a monolithic two-terminal (2T-2J) or mechanically stacked four-terminal (4T-2J) integration. We show that the optimal design of 2T-2J cell is strongly albedo dependent – the cell designed for a given albedo will perform sub-optimally for other albedo due to the current-matching constraint. A mechanically stacked 4T-2J cell, on the other hand, can perform optimally for a broad range of albedo, albeit at the cost of additional processing complications. The 3T-4J twin tandem cell could offer a relatively simpler process through back-to-back bonding of two identical monolithic 2J tandem cells with superior utilization of albedo in a broad range. The potential benefit of 3T-4J cell could however be limited due to a high front reflection, hence necessitating anti-reflection approaches. We further quantify the effect of bottom subcell material on the efficiency for PVK tandem cells. Using state-of-the-art bottom subcells, efficiency of 33% and 30% respectively could be achieved at the average Earth albedo of 30%. By integrating advanced anti-reflectance techniques, the absolute cell efficiency could further be improved by 4%.
关键词： Albedo,Simulations,Current-matching,Tandem,Bifacial gain
更新于2025-09-23 15:21:01