China energy storage net news: according to the Japan, local media reported on a new generation of solar cell "perovskite solar battery materials, apex science and technology research center at the university of Tokyo researchers, without the use of rubidium and other rare metals, 20.5% of high conversion efficiency and stable power generation.
According to the Japan, local media reported on a new generation of solar cell "perovskite solar battery materials, apex science and technology research center at the university of Tokyo researchers, without the use of rubidium and other rare metals, 20.5% of high conversion efficiency and stable power generation.The stability of crystalline structure is achieved by adding many potassium elements on the earth.In the long term durability test, the research team evaluated and discussed the practical application of such enterprises as panasonic and Toshiba.
The so-called perovskite solar cell is a solar cell with a calcium titanium crystal structure.Compared with the current mainstream silicon solar cells, the manufacturing process is simple and the manufacturing cost is low.At present, the effective conversion efficiency is greater than 20% of solar cells, and the use of rare metals such as rubidium and cesium is used to maintain structural stability.
Tokyo university research team under certain conditions by adding potassium crystalline structure, on the premise of not use rare metal, structured layer of generating successfully without defects, due to the electronic flow does not hinder formation, thus improve the conversion efficiency and stability.
In addition, the team also confirmed the use of potassium to change the current and voltage changes to inhibit the "hysteresis" of power generation.It is more effective than the use of rubidium and other metals to achieve more stable generation of electricity.Solar cells are difficult to determine the correct conversion efficiency due to hysteresis, which was a practical problem.
The study by the university of Tokyo is part of the new energy and industrial technology integrated development agency (NEDO) project.The project aims to achieve a transformation efficiency of 25 percent by 2020 and more than 95 percent efficiency after 10,000 hours of irradiation.
Therefore, it is of great significance to consider the practicality and popularization of the future.