The photovoltaic cell is to convert sunlight into electricity equipment, despite the implementation of the joint accounts of global ThinkPad R50 battery ThinkPad R51 battery energy production for only a small part. According to the U. University S. Toledo, Ohio, Dr. Alvin Kangpe An argument in 2008, world production of 20 trillion megawatts of electricity, of which only 0.035% in the photovoltaic mode of production.
“Using the sun-Driven World,” White Paper stressed that the promotion of photovoltaic technology was restricted materials high cost of silicon. The manufacture of photovoltaic cells with wide applicability, the need to develop low cost, non-toxic, abundant supplies of new photovoltaic materials.
Production capacity increases exponentially
Shanghai Institute of Technical Physics, Chinese Academy of Sciences Dr. Chu Jun-Hao, photovoltaic technology has been developed by Bell Laboratories in the 20th century, the first 50 years, the technology development of solar energy. Over the last 10 years, world production of photovoltaic cells to increase exponentially. According to data supplied by Dr Chu in 1997, Inspiron 1100 battery Inspiron 1150 battery world production capacity of solar cells of about 125.8 million watts in 2007 increased to 3.7334 billion watts. He predicted that the future installation of photovoltaic cells per year will continue to grow rapidly. A conservative estimate by 2012 this figure will reach 13 billion watts.
The production of solar cells primarily in China, mostly for export. Chu Jun-Hao stressed that, although in recent years, productions of photovoltaic cells were significantly increased, but the science and technology scientific research is still hot. Although the material costs of solar grade silicon by the end of 2007 from 350 kilograms per $ 400 until the end of the year 2008 to U.S. $ 100 per kilogram, but photovoltaic cells silicon production is still the most expensive cost accounting of a single solar panel, nearly 60%.
Cost reduction is the strategic direction
Chu Jun-ho, the different types of photovoltaic technologies. F3172A PB995A 338794-001
Technologies of crystalline silicon photovoltaic occupy a significant market share. In the whole world is installed solar panels, about 87% of the composition of crystalline silicon. However, the current cost of photovoltaic technology in crystalline silicon is too expensive, need to continually reduce the first generation of photovoltaic cells – solar cells of crystalline silicon thickness of silicon. Although in recent years, the average thickness of silicon wafers from 300 microns to 350 microns in a 150 or so, but not yet on the market can afford.
In comparison with crystalline silicon cells, the second generation of photovoltaic cells – the lower the efficiency of thin film photovoltaic cells, most of the conversion efficiency of 5% ~ 10%. In addition, the thin-film solar cells is not stable, material resulting from exposure to sunlight and deterioration. However, the material thin film solar cells required less raw material than crystalline silicon cells, and not so expensive. Chu Jun-Hao predicted that by 2012 photovoltaics in crystalline silicon from the current proportion of 87% fell to 75%, while the remaining 25% will be based on the movie account. Inspiron E1405 battery Inspiron E1505 battery
Chu Jun-Hao also mentioned the new concept of the third generation of solar cell technology – dye sensitized solar cells (DSSC). DSSC with the dye molecules absorb incident light, cheaper than crystalline silicon cells, but the yield is lower than the first two, but there are also stability problems. Dr. Meng Qingbo Chinese Academy of Sciences said that a big advantage DSSC is easier to produce. In China, the researchers observed the materials used in the electrolyte DSSC iodide, lithium iodide classic may be cheaper to replace the aluminum to further reduce costs.
Does the Earth can provide sufficient material to meet the nutritional needs of large-scale solar to attend the first session of the seminar CS3 University of Bath Laurie Bideboshi that chemists need to review past work, using a more appropriate measure on long-term, large-scale application of new materials to perform an alternative test. Inspiron E1705 battery Latitude D410 battery
The future of PV can be expected
Chu Jun-Hao believes that the development of solar cell technology must follow four steps: first, improve the processing technology of silicon solar cells crystalline, which greatly reduce the cost of silicon, improving processing materials and manufacturing process of batteries, so that beyond the addition of 40 per cent of the cost of silicon has also been declining, the second is to develop technology for thin film photovoltaic’s for new ideas and new materials, thus reducing costs while improving performance; 3 is constantly evolving and the dye-sensitized thin-film photovoltaics, the new structure, processes and concepts to improve the cost performance of the product, four scientists in all areas together, working together to find a breakthrough. Latitude D600 battery Latitude D610 battery
On the transmission of electricity on a large scale is concerned, Chu Jun-Hao raises a question: to explore and develop a variety of photovoltaic technology, one of the most effective? According to his analysis of the effectiveness in terms of silicon is still the best material, the next 10 years, the cost of silicon cells should be more readily accepted because they are used less silicon. He also predicted that the molecules of organic solar cells will occupy an important position because of low cost, but before being applied in the realization of large-scale, efficiency and stability of the need to improve. Latitude D620 battery Latitude D800 battery