High cost of solar batteries

“Solar PV power has gradually shifted from a particular area as an important complement to conventional energy sources, and to spread in the form of access to electricity market. hp Pavilion dv4000 battery ， hp Pavilion ZE2000 batteryIn the foreseeable future, photovoltaic power generation is bound to partially replace conventional energy.” October 16 day, well-known experts in the field of solar cells, Tsinghua University, Tsinghua University, Professor Zhang Gong MBA by the club-sponsored venture capital and innovation in green energy green industry forum said that in recent years, the world’s production of photovoltaic cells, as well as components of more than 30 per year % of the rate of growth, and the main force of future growth will be China.

He pointed out that, why do our own production of solar panels they can be exempt, while almost all the export? The reason is that the price of solar cells is too high.

In the August 26 meeting of the State Council executive meeting on wind power and poly-silicon and other burgeoning industries considered to be “a duplication of the building tendencies.”

“The current photovoltaic industry, the mainstream battery products polysilicon cells, but the cost is too high.” Zhang Gong that, in order to solve the solar photovoltaic industry, the problem of excessively high costs, and finding ways to improve the photoelectric conversion efficiency and reduce manufacturing costs, then the thin-film technology has become the only way for the development of solar hp OmniBook XE3 battery ， hp Pavilion dv8000 battery cells, on behalf of the future direction of development is also thin-film solar cells, but also requires high efficiency and low cost.

China Energy Network’s chief information officer HAN Xiao-ping October 20 In an interview with China Economic Times reporters, said the name suggests is a thin-film solar cells will be prepared into a layer of thin-film solar cells, which use little or no silicon content easier to reduce costs, At the same time it is both an efficient energy products, but also a new type of building material, more easily and building the perfect combination. Silicon raw materials in the international market against the backdrop of continued tension, thin film solar cell has become the international PV market development, new trends and hot spots.

Although the thin-film solar cells have already appeared, but because of photoelectric conversion efficiency is low, attenuation rate (light-induced rate of decline) was higher and so on, in previous years did not attract enough attention to the industry, market share is very low. With the continuous advancement of technology, photoelectric conversion efficiency is rapidly increasing, now more than two years ago was improved by approximately 30% -40%, while still in comparison with crystalline silicon cells is still a big gap, but the use of materials less simple technology, low energy consumption, the cost has certain advantages and is increasingly being accepted by the industry. Therefore, thin-film solar cell industry in recent years been rapid development.

Zhang Gong believes that realization of thin-film solar cell technology, we could greatly save the expensive semiconductor material at the same time, due to preparation of thin-film battery materials and battery at the same time to form, thus saving a HSTNN-LB31 battery ， hp Pavilion dv4 batterylot of processes. In addition, the thin-film solar cells using low-temperature technology, not only conducive to saving energy, but also facilitate the adoption of low-cost substrates (glass, stainless steel, etc.).

“Thin-film solar cells use a very wide range of development speed very quickly and it can be achieved with the construction of integration, for example, use it as the building of glass, into the architecture.” HAN Xiao-ping told the China Economic Times journalists, film The greatest benefit is that it the battery is not necessarily direct sunlight, even without the sun, when it can also generate electricity, although there is no sun, when it is the power generation efficiency is relatively low, but it can still generate electricity.
HAN Xiao-ping said that thin-film solar cells can also be made of vegetable greenhouses directly to the glass, made of glass that sheds only a small amount of red and orange light through, they can promote the growth of plant chlorophyll, not occupied land, and it to generate electricity.
Investment Advisor in the middle of this year released a report: in 2007 the global solar cell production reached 3436MW, compared with 2006, an increase of 56% market share of Chinese manufacturers in 2007 from 2006 of 20% to 35%, while the Japanese firms market share of 39% from 2006, slipped to 26% market share of Japanese companies fell apart by the upper reaches of silicon material supplies tight and the Japanese domestic market in PV systems installed capacity factors fall in addition to the layout of the Japanese manufacturers have already started under the generation of thin-film solar cell development does have a significant relationship.

Thin-film solar cell production in 2007 continued to exceed the overall industry growth rate in 2007, thin-film solar cell production reached 400MW, over 181MW significantly in 2006, an increase of 120% in 2007 from the thin-film solar cell market share of 8.2% increase in 2006, to 2007 to 12%, while the 2008 has reached 15% -20%. Thin-film solar cell conversion efficiency, as well as to further enhance the cost advantage of large-scale production of play, after its  hp Pavilion dv6 batterymarket share further room for improvement.
Accordingly, following the solar components of heat, hot after the polysilicon thin film photovoltaic cells has become the new investment hot spot areas.

Compared with the crystalline silicon cells, thin film cells is much greater potential for cost reduction, mainly due to rapid technological advances in thin-film batteries. Thin-film solar capacity to the next may reach 20% of the entire solar energy industry, while in 2007 only 7.6%. Thin-film solar energy should be done to improve performance indicators, there are many physical methods, such as ion beam deposition of nano-crystalline silicon film of this process, if the domestic enterprises in these methods can be improved, will be very promising.

According to market research firm released DisplaySearch8 11 solar cell production capacity Trends Report, 2009 thin-film solar cell production capacity of approximately 3.58 million kilowatts. Thin-film solar cells in 2005 the total solar cell production capacity of about 5% by 2009 is expected to exceed 20%.

However, HAN Xiao-ping China’s economic Times reporter also expressed their own concerns. He told our reporter, thin-film solar cell manufacturing process, will produce a lot of harmful gas, which is easier than conventional gas carbon dioxide increase in Earth’s greenhouse effect, the effect of carbon dioxide may be hundreds of times or even thousands of times.

“In the current situation in China, our conductive glass production capacity is also weak, needs to import large quantities, so the production costs of thin film solar cells will also be subject to a certain extent.” But HAN Xiao-ping that, in general, thin-film solar cells is also a directional technology, because it combines perfectly with the building, the resources consumed by the relatively fewer, its cost of production decline there is still much room for.
Zhang Gong also pointed out that there is not yet large-scale thin-film battery production lines, and foreign third-generation solar cell (copper indium gallium selenide CIGS cell) production company does not export technology. He is expected in 2-3 years, China will appear in large-scale production of CIGS. CIGS cells after the increase rate in China will soon, but also motivate the PV market.