Investigations of Porphyrins and Aromatic Tetracarboxylic Acid Diimides for use in Photovoltaics
Stefan GüsterSusanne SiebentrittJörg ElbeLutz KreienhoopBernd TennigkeitDieter WöhrleRüdiger MemmingD Meißner
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Abstract Photovoltaic double layer cells of phorphyrinic and aromatic tetracarboxylic acid diimid compounds are presented. The photovoltaic characteristics photovoltage, short circuit current and efficiency are reported. In addition the physical characteristics of two model compounds of each class of substances are reported.Cite
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Porous SiC Ceramics with Multiple Pore Structure Fabricated via Gelcasting and Solid State Sintering
Porous SiC ceramics with multiple pore structures were fabricated via gelcasting and solid state sintering.A novel gelling agent of Isobam was applied and PMMA was used as both foam stabilizer and pore forming agent.The mechanical properties of porous SiC ceramics were investigated as functions of PMMA content, rotating speed of ball mill, and sintering temperature.With PMMA content increasing from 5wt% to 20wt%, the foaming effect was inhibited while the stability of bubbles increased.When the rotating speed was 220 r/min, the open porosities of the as-prepared SiC ceramics sintered at 2100 varied ℃ from 51.5% to 72.8%, and compressive strength varied from 7.9 to 48.2 MPa.With the rotating speed increasing from 220 to 280 r/min, the foaming effect was aggravated and the porosities of SiC ceramics sintered at 2100 increased.℃ While the sintering temperature increasing from 2050 to 2150 , ℃ the SiC ceramics prepared with PMMA content of 20wt% at rotating speed of 220 r/min decreased in the open porosities while increased in compressive strength.
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Technologies of photovoltaics is currently underrated in Algeria. Energy potential maps can help the development of the use of photovoltaic energy. Using accurate models and database of solar radiation for calculating the electricity produced by a photovoltaic system, energy production was estimated in several sites in Algeria and maps of solar and photovoltaic potential was drawn. In addition, correlations were developed to calculate the potential, solar and photovoltaic, and the corresponding optimum tilt angle maximizing it.
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Photovoltaic manufacturing and module development photovoltaic materials and devices fundamental studies of photovoltaic materials photocrystalline thin films III-V technology amorphous silicon crystalline silicon photovoltaics performance and testing application opportunities for photovoltaics other photovoltaic programmes and safety perspectives.
Technology Development
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