Amorphous silicon thin film photovoltaic cells cost-Constitution

The most development potential in the thin-film photovoltaic cells is amorphous silicon thin film photovoltaic cells, amorphous silicon material is formed by vapor deposition, has been commonly used method is the method of plasma enhanced chemical vapor deposition (PECVD). This production process can be

To complete the continuous vacuum deposition chamber, in order to achieve mass production. Due to the low reaction temperature can be made the temperature about 200 ℃, so the film can be deposited on glass, stainless steel, ceramic plates, flexible plastic sheet, easy-to large-area

Production costs are lower.

Crystalline silicon photovoltaic cells, amorphous silicon thin film photovoltaic cells with low light response, high efficiency charging characteristic. Amorphous silicon absorption coefficient in the visible range, almost than the monocrystalline one order of magnitude, making the amorphous silicon

Photovoltaic cells in terms of theory and practical use of low light intensity have a better adaptation. More and more practical data also show that the same peak power, direct light and cloudy days the weak scattered light environment on a sunny day, the amorphous silicon PV panels of

Specific power generation volume is greater than the single crystal silicon, amorphous silicon thin film photovoltaic cells. More data indicate that, under the same environmental conditions than the single crystal silicon, amorphous silicon photovoltaic cells per kilowatt annual generation by 8% and 13% higher than polysilicon.

The most important advantage of thin film photovoltaic cells cost advantage. According to the estimates of the number of enterprises and institutions, even in the 5MW production scale, the amorphous silicon thin film solar module production costs are $ 2 / W, while the single production can reach 40MW-

60MW or even more fully automated production lines, production costs are lower. Relative to the average sales price of $ 3.5 / W in the international market, its profit margins can be imagined.

The most important issue affecting the application of amorphous silicon thin film solar cells is low efficiency, poor stability. Compared with crystalline silicon cells per watt of battery area will approximately double, limits its application in the installation space and light of the limited area of ​​the case

. The instability of a concentrated expression in the energy conversion efficiency varies with the irradiation time, until after hundreds or thousands of hours of stability, this problem to some extent, affect the application of this low-cost solar cells.

At different times in different locations the objective conditions vary, the specific data in the figure is not static, even under some special conditions may need to do a big adjustment, but the above analysis reveals some of the issues should be

The common reference value.

Editorial: In the face of the investment boom still need to keep a cool head

Investment boom in solar photovoltaic cells, silicon thin film photovoltaic cells seem to have become hot spots hot spots. Experts have pointed out, the thin-film photovoltaic cells in the next 5 years -10 years will be about 50% average annual growth rate by 2030 will account for the overall too

Solar energy more than 30% of the share of battery.

Silicon thin film solar cells is not the package to make the industry do not pay, in addition to the risk in the market, cost, technology, financing needs, the supply chain organization, the production of power supplies and technical personnel, has a higher threshold.

Funding needs, a 40MW-50MW of amorphous silicon thin-film battery production facilities total investment of 10 billion yuan, while the established economies of scale in the 300MW-500MW. This requires the investor to not only be able to raise sufficient initial investment, but also

Continue to invest to prepare for the next two to three years.

Organizational aspects of the supply chain, ultra-white glass needed for the production of high transmittance, high purity silane and so only limited sources of supply. Manufacturers must ensure a stable and cheap supply of materials, otherwise the scene in recent years, competition for silicon material

Will inevitably occur again.

And technical personnel has been one of the bottleneck in the development of thin film solar cells. Addition to the structural design of the battery itself, analysis and detection requires a special process of a large number of professionals, chemical vapor deposition, vacuum sputtering, laser engraved lines and including a variety of special gas

Body, pure water, clean air conditioning system, including the factory service support systems, and requires a lot of professional background and practical experience of the staff. Due to the large number of projects are under construction, to attract talent competition has become fierce.

In short, the rise of the investment boom of the silicon thin film solar cells has become an indisputable fact. But every one want to join one of the companies should be a comprehensive analysis of the opportunities and challenges facing, fully estimate the benefits and risks, to make their own rational and objective

Investment decisions, which is the health industry, the basis for sustainable development.





Figure One is the cost of one of the demographic analysis results can be seen from the figure, only the substrate glass and other supporting material costs accounted for more than 60% of the total cost. Therefore, policymakers should focus on the cost of raw materials, should be the beginning of the decision-making

Source of raw materials, quality, supply conditions, price trends, careful research; should focus on internal management, to take measures to ensure the utilization of the main raw materials, improve their overall yield, reduce material consumption.

The internal rate of return is an important indicator to measure the economic benefits of investment projects. Analysis of current market conditions, an annual output of 40MW-60MW silicon thin-film battery production line project's internal rate of return is much larger than the industry benchmark rate of return of 12%. Do
navigation light, shipping lights, marine search lights

Nevertheless, market and technical uncertainty will invest a huge risk. Shihai in the model simulation, therefore, we focus on the project internal rate of return, a sensitivity analysis. The analysis of the results shown in Figure 2, the product sales price is

The most sensitive factors. In fact, this is hardly surprised by the effectiveness of the production of any of the products are directly determined by the sales revenue and product costs. For the solar cell is concerned, the photoelectric conversion efficiency in determining the sales price of the battery components

An important factor. If the price of per watt of solar cells is assumed to remain unchanged, when the photoelectric conversion efficiency from 6% to 6.5%, a component of the sales price increased by 8%, while its production cost is almost the same, this would obviously revenue capacity of the project

Students a great impact.