Organic solar cells photoelectric conversion rate record - the United States
The solar cell -
According to the science daily website reported recently, scientists at the university of Michigan shows the photoelectric conversion efficiency up to 15% of organic solar cells, new results will further promote more flexible, more cheap commercial solar cells.
Researchers estimate that if the photoelectric conversion efficiency of organic solar cell can reach 15%, and the service life of up to 20 years, so its cost is only 7 cents per KWH.
And, according to data from the United States energy information administration in 2017, America's average cost per kilowatt hour 10.
Organic solar cells compared with traditional inorganic battery has many advantages.
Silicon-based inorganic solar panel manufacturing costs are high, but the organic solar cells based on carbon can cheaply manufacturing rolls, these volume thin enough, can be bent and twisted inside the building or clothing, and can be made into any color, even transparent, so as to match the surrounding environment.
But the photoelectric conversion efficiency of organic solar cells is lower, in competition with ordinary energy can candidly admit defeat.
Study lead author car small states (
Said: & other;
In the past few years, the photoelectric conversion efficiency has been hovering around 11% to 12%.
In order to break through, the researchers gathered many of the progress in the design and process.
First, they designed a system, the system combines the special layer to absorb visible light and infrared light.
In essence, they stacked the two organic solar cell & ndash;
One can absorb from 350 nm wavelength in the visible spectrum of light;
Another near-infrared absorbing wavelength of 950 nm.
Car small chau said: & other;
Battery itself photoelectric conversion efficiency of 10% to 11%, when they are stacked together, light absorption increases, in addition, we also use the antireflective coating, efficiency will be increased to 15%.
The team also prove that their new designs, materials and manufacture process of yield more than 95%, this will be extended to the industrial manufacturing process is very important.
The researchers believe that the conversion efficiency can be further improved.
Car small continent explained: & other;
Can improve the light absorption to increase electric current, and minimize the energy loss, thus improve the voltage.
Calculation results show that this kind of equipment of the photoelectric conversion efficiency can reach 18%, in the near future will help clean energy solar become true everywhere.