Improving Conventional Silicon-Based Solar Cells
Author: Source: Datetime: 2016-10-23 11:13:03
Perovskite material refers to a class of ceramic oxides, similar to the earliest structure in the natural perovskite was found named. With perovskite materials can be made of solar cells, photoelectric conversion efficiency is high, in recent years the scientific community has been optimistic about its prospects. But it also has the performance of instability, easy to decay defects, has been no mature product.
Researchers at Stanford University and Oxford University in the United States have used lead mixed with lead, cesium, iodine and other commonly used materials to produce new perovskite materials. Compared with the current solar power batteries cell materials, monocrystalline silicon, this perovskite material thinner, better flexibility, cost is also cheaper.
According to reports, they designed a new, by two series of perovskite solar cells composed of power generation equipment, with 20.3% of the overall efficiency of the solar energy into electricity, photoelectric conversion efficiency is close to now Market-based silicon-based solar cells.
Researchers say the perovskite solar cell tandem device costs less. Production of silicon-based solar panels need first processed into monocrystalline silicon, the process requires a high temperature of 1600 degrees Celsius, and the manufacture of perovskite solar cells in the laboratory can tin, lead and other common substances processing, and then sprayed at room temperature in the glass on.
The stability of perovskite materials has been a problem. Roof-mounted silicon-based solar panels typically last for 25 years or more, but some perovskite materials degrade rapidly in humid or light environments. Previous experiments have shown that perovskite materials made from tin are particularly unstable.
The researchers found that the thermal stability and air stability of the perovskite solar cells made of tin mixed with various materials and the perovskite solar cells made of tin in the environment of 100 degrees Celsius for 4 days Very good, is the latter has never had.
The study was published in the new issue of Science. One person in charge of research, Stanford University School of Materials Science and Engineering, Professor Michael McGee said that perovskite materials are promising to create high-efficiency solar cells, while reducing manufacturing costs. Another person in charge, Professor of Physics, Oxford University, UK, also believes that perovskite solar power generator cells have many advantages, in the manufacturability and stability of the case to prove, will bring changes to the photovoltaic industry.
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