scispace - formally typeset
Search or ask a question

Answers from top 9 papers

More filters
Papers (9)Insight
As a result, halogenated semiconductors provide high electron mobilities up to 1.3 cm2 V−1 s−1 in transistors and high efficiencies over 9% in non-fullerene solar cells.
Thus physical mechanisms in addition to Auger recombination are responsible for the experimentally observed values of VOCin silicon solar cells and the common-emitter current gain in bipolar transistors.
The obtained results show that it is possible to use this class of solar cells in solar concentrator systems, leading to a new class of devices with a high efficiency and a low cost.
These results are highly relevant to the development of photovoltaic thin-film solar cells, thin-film transistors, and flat-panel displays.
They, therefore, facilitate efficient use of sunlight in solar cells.
We infer from the results the possibility to use SunPower solar cells for PV powered products for low light applications
These results have important implications for the design of devices such as solar cells and pnp‐heterojunction bipolar transistors.
In this work, we demonstrate the use of such emitters on n-type BJ–BC silicon solar cells.
We propose the use of similar structures to dramatically increase the open circuit voltages in solar cell devices.

See what other people are reading

What is the effectiveness of using grounding mats in reducing stress and anxiety levels among individuals?
5 answers
Grounding mats have shown effectiveness in reducing stress and anxiety levels among individuals. Research indicates that grounding mats can lead to decreased stress-related behavioral changes by regulating the corticotrophinergic system. Additionally, studies have demonstrated that being grounded can result in increased physical function, energy levels, and decreased fatigue, depressed mood, and pain, particularly beneficial for professions prone to stress like massage therapists. Furthermore, the application of body earthing has been linked to reducing anxiety, depression, and sleep disorders through EEG signal analysis, showing improvements in theta, beta, and alpha frequency bands. Overall, grounding mats offer a promising approach to alleviating stress and anxiety by positively impacting various physiological and psychological parameters.
What are the theoretical principles behind the operation of solar-powered lamps?
5 answers
Solar-powered lamps operate based on various theoretical principles outlined in the research papers. They typically consist of photovoltaic panels to convert sunlight into electricity, energy storage units to store the generated power, and light sources like LEDs for illumination. Some designs incorporate sensors to detect objects or adjust brightness levels based on ambient conditions. Additionally, innovative lamp designs feature collapsible structures with foldable panels for portability and efficiency. A unique concept involves a solar power device that utilizes lamplight to generate electricity, forming an energy cycle system with solar panels and enabling energy storage for backup power supply. Understanding the principles of photovoltaic energy conversion, solar cell characteristics, and optical properties is crucial for the efficient functioning of solar-powered lamps.
What are the process characteristics of Extreme High-Speed Laser Material Deposition?
4 answers
The Extreme High-Speed Laser Material Deposition (EHLA) process is characterized by its unique features and benefits. EHLA focuses on coating technologies, offering significantly higher surface and deposition rates compared to conventional processes. It primarily directs energy into powder material rather than the substrate, enabling the coating of heat-sensitive materials and achieving dense, metallurgically bonded coatings for wear and corrosion protection. EHLA's innovation lies in its ability to increase process speeds dramatically, reaching up to 500 m/min, by adjusting process parameters and modifying the energy coupling between the laser beam, powder-gas jet, and substrate. This process is not only economically attractive but also sustainable, making it a preferred choice for various industrial sectors seeking efficient and effective coating solutions.
What are the potential applications of Fabry-Perot interference in SiC nanosamples with Au coating?
4 answers
Fabry-Perot interference in SiC nanosamples with Au coating holds promise for various applications. The interference property controlled by the cavity length tuning in nanophotonic devices is widely utilized. Additionally, the scattering of visible and infrared photons from nanostructured materials, such as plasmonic Ag nanoparticles, can exhibit Fabry-Perot interference patterns, aiding in imaging and detection. Furthermore, the combination of Au:Cd nanoparticles with porous-Si for photodetectors showcases enhanced responsivity due to quantum confinement effects, emphasizing the importance of nanoparticle size and surface area. This demonstrates the versatility of Fabry-Perot interference in different materials and structures, offering opportunities for advanced optical devices and sensors.
What is the typical range of pore diameters observed in the porous silicon samples?
5 answers
The typical range of pore diameters observed in porous silicon samples varies depending on the fabrication method and conditions. Pore sizes ranging from as small as <5 nm to as large as 1250 nm have been reported in different studies. Specifically, macropores in the range of 5-100 nm were achieved using various electrolytes on p-type silicon. Additionally, samples prepared at different current densities exhibited pore diameters of 265–760 nm and 900–1250 nm, with porosities ranging from 44% to 80%. Furthermore, the formation of submicron-sized pores through metal-induced etching and wider pores with variations in size through laser-induced etching have been observed, with the presence of well-aligned Si nanowires in certain samples. These findings highlight the versatility in controlling pore sizes in porous silicon for various applications.
What is post growth?
5 answers
Post-growth refers to an economic concept where the focus shifts from continuous economic expansion to a state where internal production per capita stagnates, indicating a move away from traditional growth models. This transition involves reevaluating the relationship between sustainable development and economic growth, understanding the limitations to growth, and exploring mechanisms for a post-growth economy. In a broader context, post-growth extends beyond economics to encompass societal and environmental aspects, advocating for sustainable practices in urban planning, governance, and resource management while challenging conventional norms of consumption and individualism. Furthermore, in scientific research, post-growth processes are observed in thin films even with controlled growth techniques, emphasizing the importance of monitoring and understanding these evolutions for optimizing film properties and device performances.
How solid-phase Fe2 spontaneously reacts with s2-?
5 answers
Solid-phase Fe2 can spontaneously react with S2- to form FeS2, as observed in various studies. The reaction involves the transformation of Fe2O3 into FeS2 through a direct solid-state process facilitated by a H2S plasma, bypassing intermediate phases like Fe1-xS. Additionally, experiments with deuterium atoms on a pyrite FeS2 surface showed the formation of D2S products, indicating a reaction where D atoms likely reacted in thermal equilibrium with the surface, depleting surface sulfur atoms and leaving an iron-rich surface with layered Fe-S phases. This reaction mechanism is crucial for understanding the synthesis and properties of FeS2, a material with potential applications in lithium-ion batteries and catalysis.
Dip coating of polymer solution - what are the key parameters?
5 answers
Key parameters in dip coating of polymer solutions include solution concentration, drying temperature, polymer type, and the presence of additives like plasticizers. The concentration of the polymer solution and the drying temperature significantly impact the coating's homogeneity and hydrophobicity. Additionally, the type of polymer used for coating, such as polyethylene-grafted-maleic anhydride (PE-MAH) or poly(lactic acid) (PLA), influences the water resistance and tensile properties of the coated material. Moreover, the presence of inorganic fillers or nanoparticles in the dipping mixtures can affect the thickness and properties of the resulting thin film, with the volume fraction of these particles playing a crucial role in solid transfer and film formation. These parameters collectively determine the quality and characteristics of the polymer coating deposited through the dip coating process.
What metals are used in the use of microneedles?
5 answers
Microneedles are fabricated using a variety of materials, including silicon, stainless steel, polymers, metals, and carbohydrates. Stainless steel is a commonly used metal in microneedle production, with different grades containing varying amounts of nickel. For instance, the microneedles used by authors are composed of 316L alloy, which contains 10% to 14% nickel. Additionally, metallic microneedles made by local electrodeposition-based additive manufacturing can be created using copper on copper-coated or gold-coated silicon substrates, showing antimicrobial properties. These metallic microneedles offer potential advantages in terms of drug delivery and antimicrobial activity, showcasing the versatility and effectiveness of metal-based microneedles in various biomedical applications.
Metals in the use of microneedles?
4 answers
Metals play a crucial role in the fabrication of microneedles for various applications. Electrochemical-based additive manufacturing techniques, such as CERES, enable the creation of metal microneedles with antimicrobial properties. Metallic microneedles offer advantages over polymeric ones, providing mechanical integrity and tailored drug release capabilities for transdermal drug delivery systems. The use of metals like copper in microneedles has shown promising antimicrobial activity against bacteria and fungi, making them suitable for medical applications. Additionally, the fabrication of microneedles using automated wire bonding processes on flexible substrates demonstrates the potential for mass production of metallic microneedle arrays. Furthermore, the composition of metals in microneedles, such as stainless steel containing nickel, raises considerations for potential allergic reactions in patients, highlighting the importance of material selection in microneedle design.
What is coating flattening?
4 answers
Coating flattening refers to the process of smoothing out a coated material to ensure uniformity and quality in the final product. Various devices are designed for this purpose, such as arc-shaped roll flattening mechanisms that help prevent wrinkles and ensure consistent tension across wide base materials. Additionally, thin film coating devices utilize negative pressure and air adsorption to guide and flatten coated thin films, improving composite quality. Furthermore, devices like the accounting document rubber coating flattening device offer integrated functions of coating, drying, and flattening to streamline processes and enhance the quality of accounting documents. These devices play a crucial role in the manufacturing industry by enhancing the appearance and functionality of coated materials.