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Thin film crystalline silicon cell power generation principle and is similar to the battery when the sun light shines MBT Tembea, the cells absorb light energy generated electron - hole pairs, the role of the battery built-in electric field, the photoinduced electrons and holes are separated, the hole drift to the P side of the electron drift to the N-side to form a photo-emf, when connected to the external circuit MBT Tunisha, producing current.

Crystalline silicon thin-film batteries and the battery of comparison:

Advantages:

(1) low cost, according to Photon forecasts MBT Tupu, is expected to drop to $ 2.08 in 2012 / w; estimated average price of thin-film batteries can be from the current $ 2.65 / w down to $ 1.11 / w, with the obvious advantages compared to crystalline silicon ; and related thin

Film battery manufacturers more optimistic forecasts, EPV is estimated that by 2011, the cost of thin-film modules will be much lower than $ 1 / w; Oerlikon even estimated that in 2011 GW power levels will reduce the cost of its components at 0.7 U.S. dollars / w, This is because the conversion rate and scale brings.

(2) good low-light

(3) for PV and building integrated components (BIPV), stainless steel and polymer substrates for flexible thin film solar cells such as building roofs, according to need to make a different transmission rate, instead of glass curtain wall.

Disadvantages:

(1) low efficiency, monocrystalline silicon solar cells, single efficiency is 14% -17% (AMO), the flexible substrate of amorphous silicon solar modules (about 1,000 square centimeters) of 10-12% efficiency, but also some gaps.

(2) poor stability, the instability embodied in the energy conversion efficiency of irradiation time with the change until after hundreds or thousands of hours of stability. This problem to some extent affected the application of this low-cost solar cells.

(3) the same output power required to increase the size of solar cells, compared with crystalline silicon cells, the cell area per watt would be approximately double that in the limited installation space and light area of the case limits its application.

Yingli Solar energy company to increase production capacity

October 22, Yingli Green Energy Holding Company Limited, held in Baoding, Hebei ceremony witnessed the 60th anniversary of New China, the report will be heroes. During the meeting, the company announced that it has completed ahead of 180,000 kilowatts of solar cell sales tasks, while a total investment of 60 billion yuan, annual output of 80 million kilowatts of solar cells Yingli Industrial Park Phase IV project and has also started construction.

Miao Li, chairman of the British students even said that China has strongly advocated in the context of the development of new energy sources, Yingli Group, the development of near-term goal is to realize the cost of photovoltaic power generation gradually reduced to 1 yuan / kwh.

Yingli Group has silicon, silicon ingots, wafers, cells, components, system applications, a complete industrial chain, its capacity in 2012 will reach 140 million kilowatts. These factors have helped to reduce the cost of photovoltaic products.