The United States scientists imitate the structure of insect compound eye, design a strong and durable perovskite solar cells, to overcome the weakness of perovskite materials vulnerable to damage.
Experiments show that the new type of battery can continuously operate for six weeks in an environment with a temperature of 85 degrees Celsius and a relative humidity of 85%, and still maintain a high power generation efficiency.
The perovskite material has excellent photoelectric properties and low manufacturing cost. The disadvantage is that the structure is fragile, and it is easily broken under the action of external forces, and can not tolerate high temperature and high humidity, and does not meet the requirements for long-term outdoor operation of solar cells.
Insect compound eyes consist of a large number of tiny hexagonal eye surfaces, which are in a honeycomb structure. One eye damage will not affect the function of other parts. Each eye has a protective stent around it. Researchers at Stanford University in the United States drew on this structure and used a large number of miniature perovskite batteries to form a honeycomb, forming a large battery.
Researchers in the United States "Energy and Environmental Science" magazine reported that each micro-battery is wrapped by a small hexagonal stent, the stent is made of epoxy resin, low cost, solid structure, not easily broken, basically does not affect Photoelectric properties of perovskite materials.