Solar Cells Materials Manufacture And Operation Pdf File
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In addition to efficiency, materials and manufacturing costs are the greatest levers controlling the cost of solar power. Solar cell, also called photovoltaic cell, any device that directly converts the energy of light into electrical energy through the photovoltaic effect. There are two main types of solar power systems, namely, solar thermal systems that trap heat to warm up.
The CIGS material has a direct bandgap and high absorption coefficient. This gives promise to the potential of high efficiency solar cells made with minimal material consumption. Another major characteristic of this material is that beneficial optoelectronic properties can be obtained with a wide range of compositional variations. Subsequent improvements would enable a polycrystalline thin-film design. The active CIGS layer is a polycrystalline film with the chalcopyrite crystal structure.
Solar cell efficiency
Solar cell , also called photovoltaic cell , any device that directly converts the energy of light into electrical energy through the photovoltaic effect. The overwhelming majority of solar cells are fabricated from silicon —with increasing efficiency and lowering cost as the materials range from amorphous noncrystalline to polycrystalline to crystalline single crystal silicon forms. Unlike batteries or fuel cells , solar cells do not utilize chemical reactions or require fuel to produce electric power , and, unlike electric generators , they do not have any moving parts. Solar cells can be arranged into large groupings called arrays. These arrays, composed of many thousands of individual cells, can function as central electric power stations, converting sunlight into electrical energy for distribution to industrial, commercial, and residential users. Solar cells in much smaller configurations, commonly referred to as solar cell panels or simply solar panels , have been installed by homeowners on their rooftops to replace or augment their conventional electric supply. Solar cell panels also are used to provide electric power in many remote terrestrial locations where conventional electric power sources are either unavailable or prohibitively expensive to install.
A thin-film solar cell is a second generation solar cell that is made by depositing one or more thin layers, or thin film TF of photovoltaic material on a substrate, such as glass, plastic or metal. Thin-film solar cells are commercially used in several technologies, including cadmium telluride CdTe , copper indium gallium diselenide CIGS , and amorphous thin-film silicon a-Si, TF-Si. This allows thin film cells to be flexible, and lower in weight. It is used in building integrated photovoltaics and as semi- transparent , photovoltaic glazing material that can be laminated onto windows. Other commercial applications use rigid thin film solar panels interleaved between two panes of glass in some of the world's largest photovoltaic power stations. Thin-film technology has always been cheaper but less efficient than conventional c-Si technology.
Solar cell efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity by the solar cell. The efficiency of the solar cells used in a photovoltaic system , in combination with latitude and climate, determines the annual energy output of the system. A solar panel can produce more when the sun is high in the sky and will produce less in cloudy conditions or when the sun is low in the sky. The sun is lower in the sky in the winter. Several factors affect a cell's conversion efficiency value, including its reflectance , thermodynamic efficiency , charge carrier separation efficiency, charge carrier collection efficiency and conduction efficiency values.
Solar cells materials manufacture and operation pdf file
By Augustin McEvoy , L. Castaner and Tom Markvart. Enormous leaps forward in the efficiency and the economy of solar cells are being made at a furious pace. New materials and manufacturing processes have opened up new realms of possibility for the application of solar cells. Crystalline silicon cells are increasingly making way for thin film cells, which are spawning experimentation with third-generation high-efficiency multijunction cells, carbon-nanotube based cells, UV light for voltage enhancement, and the use of the infrared spectrum for night-time operation, to name only a few recent advances.
A solar cell is an electronic device which directly converts sunlight into electricity. Light shining on the solar cell produces both a current and a voltage to generate electric power. This process requires firstly, a material in which the absorption of light raises an electron to a higher energy state, and secondly, the movement of this higher energy electron from the solar cell into an external circuit. The electron then dissipates its energy in the external circuit and returns to the solar cell. A variety of materials and processes can potentially satisfy the requirements for photovoltaic energy conversion, but in practice nearly all photovoltaic energy conversion uses semiconductor materials in the form of a p-n junction. Skip to main content.
Solar Cell Structure
E-mail: Palat. Meethale-Ushasree newcastle. Chapter 1 is an introductory chapter on photovoltaics PVs and gives a technological overview on silicon solar cells. The various steps involved in the development of silicon solar cells, from the reduction of sand to fabrication of solar cells, are described in detail. The global status of solar PV modules in terms of their contribution to energy generation is also discussed.