Amorphous silicon dice specification 3

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Pv modules at present, the mainstream products are still in silicon as the main raw materials, only in terms of silicon raw material consumption, production 1 mw of crystalline silicon solar cell, need 10 to 12 tons of high purity silicon, but if use the same silicon materials used to produce thin film amorphous silicon solar cell can produce more than 200 mw.

From the perspective of energy consumption, amorphous silicon solar battery only 1-1.5 years of energy recovery period, more embodies its contribution to energy saving in the manufacturing process.

Component occupies a high proportion of costs in a photovoltaic system, the component prices directly affect the system cost, and thus affect the cost of photovoltaic power generation. Calculated at the current price of components, the same money, buy amorphous silicon products, you can get more close to 30% of the power components.

2, more power

For the same power of solar cell array, amorphous silicon solar cell is about 10% more than monocrystalline silicon, polycrystalline silicon battery power. This has been the Uni - Solar System LLC, Energy Photovoltaic Corp., Japan's Kaneka Corp., the Netherlands Energy research institute, and other organizations and experts confirmed that the Photovoltaic industry.

In sunny, that is to say, under the high temperature, amorphous silicon solar cell components can show more excellent power performance.


3, better low light response

Due to the characteristics of amorphous silicon atoms are arranged disorderly, the electron transition no longer comply with the restriction of traditional \"selection rule\", as a result, its light absorption characteristics and there are big differences monocrystalline silicon material. Amorphous silicon and monocrystalline silicon material absorption curve as shown

, amorphous silicon absorption curve has obvious three sections (A, B, C). Area A corresponding electronic transition between localized states, such as the gap state near Fermi level and to the tail state transition, the absorption coefficient is small, about 1-10 cm - 1, for this is absorbing; B area absorption coefficient with the increase of the photon energy index rose, it corresponds to the electrons from the valence band edge extension state to the conduction band localized state transition, as well as the localized electrons from the valence band tail states guide for edge extension state transition, the region's energy range is usually only about half of the electron volts, but absorption coefficient across two or three orders of magnitude, usually up to 104 cm - 1; Area C corresponds to the electrons from the valence band to the conduction band internal internal transition, the absorption coefficient is bigger, often in more than 104 cm - 1. After two absorption area is crystalline silicon eigen absorption area.

Can be seen in the figure, the intersection of two curves about 1.8 ev. It is important to note that in the visible light range (1.7 to 3.0 ev), the absorption coefficient of amorphous silicon material is almost an order of magnitude larger than the single crystal silicon. That is to say, in the morning the first part of the sun is not too strong, the second half, and it's cloudy in the afternoon under the condition of low light intensity, long wave is greater, the amorphous silicon material still has a large absorption coefficient. Again considering the amorphous silicon band gap is larger, the reverse saturation current I0 is smaller. And as mentioned the amorphous silicon battery the characteristics I - V characteristic curve of the amorphous silicon solar cell both in theory and in practical use in low light intensity has good adaptation.

• I - V characteristics of amorphous silicon cells after more than a Vm with the voltage drop slowly


In order to be convenient, we draw the I - V characteristics of two kinds of batteries on the same picture. Crystalline silicon and amorphous silicon battery I - V characteristics of general shape as shown

 we see from the picture, two kinds of cells in the curve changes after exceed the maximum output power point gap is bigger. Output current of crystalline silicon cells after exceed the maximum output power point will soon fall to zero, curve steep; Rather than crystalline silicon cells output current after a long distance to fall to zero, the curve is relatively flat. Two kinds of battery Vm equivalent to about 83% of its open circuit voltage and 83% respectively.

 when light intensity gradually become hour, short circuit current and open circuit voltage of solar battery will be stronger. Short circuit current decreases faster, of course, open circuit voltage decrease more slowly.

 do in battery solar cell array under the condition of load, when the sun battery array of effective output voltage less than the terminal voltage of battery, battery cannot be recharged. When the light intensity gradually become hour, crystal silicon battery charging does not meet the conditions, and amorphous silicon due to the larger voltage difference, do not charge until the light is very dark, effectively increase the use of sunlight time. So, amorphous silicon cells to produce more electricity than the crystalline silicon.

4, more excellent high temperature performance

High in the outdoor environment temperature, amorphous silicon solar cell performance change, depends on the temperature, spectrum, as well as other related factors. But what is certain is: amorphous silicon than monocrystalline silicon or polycrystalline silicon are less likely to be affected by temperature.

Amorphous silicon solar cells than monocrystalline silicon, polycrystalline silicon cells have relatively small temperature coefficient of amorphous silicon solar cell output power best Pm temperature coefficient is about 0.19%, and monocrystalline silicon, polycrystalline silicon cells best output power Pm temperature coefficient is about 0.5%, when the battery work at higher temperatures, the two batteries will be a drop in the Pm, but the decline is different. They can be calculated using the following formula.


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Q:What are the raw materials of silicon wafers
As a variable current switch, the transistor can control the output current based on the input voltage. Different from the common mechanical switch (such as Relay, switch), the transistor uses the electrical signal to control the opening and closing, and the switching speed can be very fast, the switching speed of the laboratory can reach more than 100GHz.
Q:Is solar silicon wafer often harmful to the body?
. The main materials used in solar cells, such as single crystal silicon wafers, metal products, silver electrodes, etc., are harmless to the human body. Immature production process may lead to harmful gases such as dust, light and heat electromagnetic radiation, noise, etc..
Q:After the velvet or the original silicon
The complaint can be suppliers, with hydrofluoric acid washed off after processed velvet
Q:Why integrated circuits can be etched on silicon
Integrated circuit (integrated circuit) is a kind of micro electronic device or component. With certain techniques, the transistor, required a circuit of resistance, capacitance and inductance components and interconnect wiring together, produced in a small or a few bits of the semiconductor wafer or substrate, and then encapsulated in a tube shell, a micro structure required for the circuit function; all of them element in the structure has formed a whole, so that the electronic components to miniaturization, low power consumption, high reliability and intelligent a huge step forward. It is represented by the letter "IC" in the circuit. The inventor of the integrated circuit is Jack Kilby (based on Ge) and the (silicon based (Si) integrated circuit). Most of the semiconductor industry today is based on silicon integrated circuit.A new type of semiconductor device developed in the late 1950s of 60s. It is through oxidation, photolithography, epitaxy, diffusion, evaporation of aluminum and semiconductor manufacturing process, the connecting wire between the required circuit has a certain function of the semiconductor, resistors, capacitors and other components and they are integrated in a small piece of silicon wafer, and then welding electronic devices are encapsulated in a casing. The outer shell of the utility model is provided with a round shell type, a flat type or a double line type. IC technology includes chip manufacturing technology and design technology, mainly in the processing equipment, processing technology, packaging testing, mass production and design innovation ability.
Q:What can be used to adjust its viscosity
Polyethylene glycol and water soluble, I believe this may help you solve the problem
Q:What to do with silicon. What is the relationship between the semiconductor and the PCB board
But a good silicon chip is not available. Because the bare silicon wafer is not easy to damage and difficult to connect. This is a process of binding, the so-called binding is bound to use a very fine gold wire from the silicon chip lead wire, received on the metal pipe, and then use the non-conductive plastic to bind the chip sealed. We generally see transistors, chips, etc. are packaged, you simply can not see the inside of the core. Of course is also useful in metal or ceramic chip shell, such as the two or three level of some high power tubes, military grade components etc., but because the metal and ceramic package cost is relatively high, so most of the circuit or engineering plastic package.PCB is a printed circuit board, is what we call the board. The copper wire and the welding of various components and chips. The manufacturing of printed circuit board, you should check the information bar, then I talk today what also don't want to do
Q:Is a wafer a silicon wafer and a wafer?
Ion implantation, etc., can be made into various semiconductor devices
Q:How to do on the silicon wafer
The general use of ultrasonic and pre cleaning (pickling) can be solved
Q:After cutting a few chips, mortar density is getting lower and lower
PEG water absorption is very strong, as long as the air humidity is slightly higher, then did not cut the water content of a mortar on the rise, as well as the viscosity of mortar and mortar temperature is related to the temperature difference, the viscosity of mortar to a difference of about 10
Q:Solar silicon wafer cutting fluid can burn explosion?
Combustible gas is hydrogen is not polyethylene glycol, but no matter because of ventilation, ventilation, to avoid the closed environment in the case of an open flame on the line

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