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China's energy storage network: up to now, more than 80 percent of the world's energy is generated by burning oil, gas and coal.First, it can lead to serious environmental pollution.Second, humans have consumed more than half of the world's recoverable oil reserves in the past two hundred years.At present, scientists around the world focus on how to improve the efficiency of solar photovoltaic conversion, but very little attention is paid to the stability of the solar panel material.
Under the Russian science foundation funding to EKeYuan institute of chemical physics scientist, led the international team developed by the organic semiconductor material (conjugated polymers and fullerene derivatives) as the matrix of high stability of thin film solar cells, this is a kind of photochemical and high thermal stability, and can be effectively applied to the best performance of organic solar cells of new photosensitive materials.Organic solar cells are expected to revolutionize the global energy industry because they cost less than fossil fuels.The findings are published in the Journal of Materials Chemistry.
Sunlight is a promising environmental and cheap energy source.It is estimated that the annual energy demand for all human beings is about 20 terawatts, while the sun radiates about 105 terawatts of energy per year.Therefore, the sun can be seen as an inexhaustible source of energy for modern society.The solar cells based on organic semiconductor materials have the characteristics of light weight, low cost and flexibility, which have attracted great attention from researchers and innovative enterprises.
The research results of Russian scientists mainly include:
One is created for new conjugated polymer group of organic solar cells, and found that using the monomer unit arranged in the main chain of irregular copolymer, the photoelectric characteristics superior to link arranged alternately in a strict order of the conventional structure of the polymer.The efficiency of the developed and developed organic solar cells with conjugated polymers is greater than 7%, which is one of the best results of similar devices in the international area larger than one square centimeter.
2 it is developed for organic solar cells, fullerene derivatives as matrix of the new electron acceptor material, the new material to ensure organic solar cell in 140 ℃ high temperature operation stability.This is an important step to realize the long-term stable operation of the organic solar cell equipment and the practical application.
Russian scientists conducted field trials of several types of organic solar cells in the Israeli negev desert and studied the most important factors affecting the stability of solar cells.The results show that the optical stability of the material can be easily screened by the electron paramagnetic (spin) resonance method and the most promising structure is found.