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(a) Schematic diagram of a planar perovskite solar cell, (b) Current-voltage curve of a battery device.
The new perovskite solar cell was rated as the world's top ten scientific breakthrough in 2013 due to its low cost and excellent photoelectric performance. It is believed that it will promote revolutionary changes in the photovoltaic energy industry, and it is hoped that the solar energy generation will become a civilian era.
Recently, the research team led by Dr. Yu Shuping of the Advanced Energy Storage Technology Center (Qingdao Institute of Energy Storage Technology) of the Chinese Academy of Sciences Qingdao Institute of Bioenergy and Process Technology has successfully developed a new type of titanium-based solar energy material (NH2CH=NH2PbI3).
Because of its good thermal stability and photoelectric conversion performance, this material has broad application prospects in the field of low-cost flexible solar energy storage (such as photovoltaic greenhouses, etc.), and related work was published in the Chemistry of Materials magazine, highly praised by international counterparts. . A letter from the editor of Chemistry of Materials pointed out that the article concerning this result was the article with the highest number of downloads in this issue in February. At present, the technology has been patented to protect intellectual property rights.
The research group is further optimizing the perovskite materials and devices by reducing the crystal lattice and dislocation defect concentration in the crystal and increasing the diffusion distance of carriers; by grain boundary passivation, the defect level of the grain boundary can be reduced. The carrier capture effect, so as to further improve the photoelectric conversion efficiency. In the planar battery structure, the 11.3% photoelectric conversion efficiency of this material has reached the world leading level of the device structure.
The research team has also made new progress in the design and fabrication of non-lead, environment-friendly, perovskite photoelectric conversion materials and their device applications. Based on this, atomic layer deposition (ALD) technology and ROLL TO ROLL technology are explored to produce low-cost, large-area, flexible, and high-efficiency solar cells, which will greatly satisfy Qingdao and even Shandong regions for low-cost flexible photovoltaics. Demand for greenhouses.
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