What is the difference between crystalline silicon photovoltaics and thin film photovoltaics?

Introduction What is the difference between crystalline silicon photovoltaic power generation and thin film photovoltaic power generation? Crystalline silicon photovoltaic solar power generation uses polycrystalline silicon components, and thin-film solar power genera

What is the difference between crystalline silicon photovoltaics and thin film photovoltaics?

Crystalline silicon photovoltaic solar power generation uses polycrystalline silicon components, and thin-film solar power generation uses double-junction silicon-based thin-film modules

1. Advantages of crystalline silicon solar power. Photovoltaic energy production:

1. The output power of a 1 square meter double-junction silicon-based thin-film module is about 78 Wp, while the output power of a polycrystalline silicon module of the same area is about 147Wp.

2. In addition to components, the cost of other supporting products is lower. Since the output power per unit area of ​​crystalline silicon modules is about twice that of double-junction silicon-based thin-film modules, then to build a solar photovoltaic power plant of the same size, the number of si modulesThe crystalline silicon used is about half that of double-junction silicon-based thin-film modules. The consumption of electrical equipment and cables required in solar photovoltaic power plants using crystalline silicon modules is much lower than that using double-junction silicon-based thin-film modules.

3. Small footprint. To build a rooftop solar PV plant with the same capacity, the number of crystalline silicon modules required is much lower than that of double-junction silicon-based thin-film modules. As a result, the floor space of a rooftop photovoltaic plant using crystalline silicon. The modules are larger than those of a double junction solar power plant. Silicon-based thin-film modules are much smaller, making solar photovoltaic power generation systems more cost-effective.

4. The structure of crystalline silicon modules makes them easier to transport than thin-film modules based on double-junction silicon. Since most large-scale ground-mounted solar PV plants are built in remote areas, they need to be transported by sea, land and other means to reach the project site. During the transportation process, double-junction silicon-based thin-film modules. (especially frameless products) due to their own glass structure the product is more likely to break under the same packaging conditions, while this rarely happens with crystalline silicon components.

5. Easy to install. Crystalline silicon modules are lighter than double-junction silicon-based thin-film modules and are easier to install on racks at the project installation site.and distributed photovoltaic power plants.

The main shortcoming of crystalline silicon components in the application of rooftop solar photovoltaic power plants is that in the case of shading, it is easy to form an island effect, which will reduce considerably the cost of the entire network. and even the solar power plant on the roof.

2. Advantages of thin-film solar power generation:

The main advantages of double-junction silicon-based thin-film modules in the application of solar photovoltaic power plants are:< /strong> p>

1. The power temperature coefficient is low. The temperature coefficient of double-junction silicon-based thin-film modules is about -0.19%/℃, while the temperature coefficient of crystalline silicon-based modules is about -0.44% /℃, which shows that double-j silicon-based thin-film modulesunction are suitable for use in summer, in tropical areas or in desert areas. The power generation capacity in watts is slightly higher than that of crystalline silicon modules.

2. When the light is dim or there is shade, the power generation capacity of photovoltaic plants using double-junction silicon-based thin-film modules is slightly higher than that of distributed photovoltaic plants on roofs constructed from crystalline crystals. silicon modules.

How much energy does solar produce per square meter per day?

The two have the following differences:

1. Different principles of power generation

Thin-film power generation relies on light and thinness., flexible thin-film solar cell chips, embedded in various carriers such as Intel chips (IntelInside), provide clean electricity. Photovoltaic power generation is a technology that uses the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy. p>

2. Different uses

Thin film power generation is mainly used for mobile phones, iPads, backpacks, tents, clothing, special equipment or solar cars. It can be charged while driving. the sun, eliminating the need for recharging. Dependent on batteries, photovoltaic power generation is used for stationary power generation devices, such as solar water heaters

3 Different Application Technologies

Thin -. Film power generation uses solar chips to generate power, while photovoltaic power generation uses light generation using semiconductor interfaces.rs.

Detailed information:

Advantages. and disadvantages of photovoltaic power generation

Advantages

No matter the world Still looking at China, conventional energy sources are very limited. China's primary energy reserves are far below the global average, accounting for only about 10% of the world's total reserves.

Solar energy is an inexhaustible renewable energy source for humanity and is entirely clean, safe and relative. reliable and maintenance-free long service life, resource adequacy and potential saving, etc., play an important role in long-term energy strategy.

Compared with commonly used thermal power generation systems, the advantages of photovoltaic power generation are mainly reflected in:

①No risk of depletion

②Safe and reliable, no noise, in addition to the absenceof polluting emissions, it is absolutely clean (no pollution);

③It is not limited by the geographical distribution of resources and can take advantage of the roofs of buildings, for example, areas without; electricity and areas with complex terrain;

④Can generate electricity and provide electricity on site without consuming fuel or erecting transmission lines;

⑤High power quality;

⑥Easy to use users need to accept emotionally;

⑦ The construction period is short and the time spent on obtaining energy is short.

Disadvantages

However, the production of solar panels is characterized by high pollution and high energy consumption. In current conditions, it is still possible to produce panels for domestic use, but. large-scale exports are equivalent to polluting China and benefiting the world.

According to statistics, mores of 40 kilograms of coal must be burned to produce a 1m x 1.5m solar panel, but even the most inefficient thermal energy A solar power plant in China can still use these coals which produce 130 kilowatt hours of electricity (typically , a 1m x 1.6m solar panel generates over 250 kilowatt hours per year) - this is enough to make a 2.2 watt light emitting diode (LED). The bulb glows for 30 years based on a 12-hour workday.

① The energy distribution density of irradiation is small, that is, it occupies a huge area

② The energy obtained is related in the four seasons, day and night, cloudy; and sunny and other weather conditions.

③ At present, compared to thermal power generation, the cost of generators is high.

④LightThe manufacturing process of laminated panels is not environmentally friendlyis lying.

Baidu Encyclopedia - Thin Film Power Generation

Baidu Encyclopedia - Photovoltaic Power Generation

What is the difference between modules crystalline silicon solar cells and thin film solar modules

There are several types of solar power generation. One is crystalline silicon material, including monocrystalline silicon and polycrystalline silicon, the other is amorphous silicon power generation, that is, it is not crystalline. silicon. There are thin-film solar power and flexible solar power generation. Due to the low conversion rate of amorphous silicon, crystalline silicon solar power generation is now more widely used.

As for your approximate energy output per square meter per day, generally speaking, 1 square meter of crystalline silicon solar panels is equivalentat about 120-140 W. If calculated as 120 W, the power of the sun at 6 a.m. day, i.e. 120*6=720WH. A 10W lamp depends on how many hours you use it per day and how many consecutive rainy days you need. If you use it 9 hours a day and 3 rainy days, then the battery panel. is 30 to 50 W.

Solar energy comes from celestial bodies outside the Earth (mainly solar energy). This is the enormous energy released by the fusion of hydrogen nuclei in the sun at ultra-high temperatures. that humans need comes directly or indirectly from the sun. Fossil fuels such as coal, oil and natural gas that we need to live are all formed by various plants which convert solar energy into chemical energy through photosynthesis and store it in plants, then by plants and animals buried underground for a llong period. period of geological time. In addition, water power, wind power, wave power, ocean current power, etc. are also converted from solar energy.

1. Properties

Crystalline silicon solar cell module: The most widely used solar cell, mainly due to the stability of crystalline silicon and the efficiency it can achieve. 15%-25%.

Thin-film solar modules: Using discarded silicon wafers, silicon wafers are not necessarily cheap given their efficiency levels.

2. Features

Crystalline silicon solar cell modules: Monocrystalline silicon comes from high purity single crystals, cut into wafers with a diameter of 150mm and a thickness of 200mm. Polycrystalline silicon is more popular and can be manufactured in larger quantities. Byexample, silicon is cut into strips and then cut into slices. The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency. of polycrystalline silicon solar cells is much lower, its photoelectric conversion efficiency is about 15%.

Thin film solar modules: The manufacturing method is completely different from crystalline silicon solar cells. The process is greatly simplified. The silicon consumption is very low and the power consumption is lower. it can produce electricity in low light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and it is not stable enough. Over time,its conversion efficiency decreases.

Detailed information:

Basic requirements for solar cell modules:

p>< p>1, able to mentionProvide sufficient mechanical strength for solar cell modules to withstand stress caused by shock, vibration, etc. during transportation, installation and use, and can withstand the impact of hail

2. able to prevent wind, water and corrosion of solar cells under atmospheric conditions;

3. It has good electrical insulation properties

4.

Baidu Encyclopedia-Solar Cell Components

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