What are the advantages and disadvantages of perovskite solar cells?

As for perovskite solar cells, the scientists in the latest study found that a perovskite structure of organic solar cell conversion efficiency may be as high as 22.1%, which is 2 times of the solar cell conversion efficiency on the market at present. It can greatly reduce the cost of solar cells. Related research is published in the latest issue of the journal nature.

Although the team has not yet been demonstrated by the new material as raw material to manufacture high efficiency solar cells, the study has become a powerful supplement, after many proved with unique crystal structure of perovskite is expected to change the face of the solar industry. Currently on the market of the mainstream of the solar cell silicon and cadmium telluride, for materials, to achieve the conversion efficiency for more than 10 years; And perovskite only took just four years of study, because of this, even if the conservatives are very bullish on the perovskite.

Study leader, energy innovation research center at the university of Pennsylvania, said Andrew ˙ eminem, director of the joint to the new perovskite as raw material to manufacture of solar cells can be roughly half of the sunlight directly into electricity, as the current 2 times, therefore, only half the solar cell can provide the same power, this will reduce the cost of the installation, so as to lead to significantly reduce the total cost.

In addition, eminem said, unlike traditional solar cell material, the new material does not need to generate an electric current, electric field which will reduce the quantity of materials required, the resulting voltage is higher, which can increase the energy output; Also, the new material also can well respond to visible light, it is of great significance for the solar cell.

Researchers have proved that the new material can effectively make a little change to different wavelengths of sunlight into electricity, scientists may to produce solar cells with different layer, each layer of absorption of different wavelengths of sunlight, so as to improve energy efficiency.

There is, however, experts stressed that although these properties are very useful, but eminem team want to make available perovskite solar cells is still a long way to go. The resulting current is first of all, the solar battery is low.

The advantages and disadvantages of perovskite solar cells

From 2009 to 2015 in just six years, perovskite photoelectric conversion efficiency of solar cell suddenly jumped to 20.3% from 3.8%, improved more than 5 times. Its efficiency, the rapid progress that evaluated by the journal science, one of the ten major scientific breakthrough of 2013.At present, the academic research of perovskite solar cells is still very active, the industrialization prospect is also very bullish on, but the research of practical technology is yet to be.

Advantages and disadvantages of perovskite solar cells

This is because:

The advantage of the perovskite battery:

Conversion efficiency development speed - 6 years rose from 3.8% to 20.3%, and in November 2013, scientists in the United States in the new study found that the new titanium calcium conversion efficiency of solar cell, or can be as high as 50%, to 2 times that of the solar cell conversion efficiency on the market at present, this shows that it still has great potential for development; Battery production process simple - laboratory often by liquid phase deposition, vapor deposition process, liquid/gas phase mixed deposition process;

Battery power cost is low, and even could be lower than thermal power;

Building integrated potential - perovskite belongs to thin-film batteries battery, at present the main is deposited on the glass, you can control the thickness of each layer and the material to achieve different levels of transparency and efficiency will decrease, of course, but this type of application is worthwhile, such as laboratory at the university of Oxford have can make half pervious to light (beige) battery. If the lighting and power generation integrated solar cell development smoothly, is expected to become tall building curtain wall decoration, colored glass sticker vehicles such as alternative.

Advantages and disadvantages of perovskite solar cells

The perovskite battery of disadvantage:

Toxic materials - perovskite batteries contain lead, but with other types of batteries contain lead, gallium, tellurium, cadmium, arsenic is dwarfed. And northwestern university has also developed a substitute tin lead perovskite solar cells, but the battery conversion efficiency is only 6%, and the material is very unstable, is at a primary stage of development;

Material is not stable, lead in perovskite oxide easily make iodine volatility, and is easy to decompose when crystals in the wet. If we use the perovskite battery power, it is likely to decompose the seepage flow to the roof or in the soil;

The battery life is not long, at present, the life expectancy of perovskite solar cell can reach 1000 hours, by Huazhong university of science and technology and the ecole polytechnique federale in lausanne cooperative research and development. The battery life and traditional silicon, generally can be up to 25 years, much longer than the perovskite batteries.

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