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An international research team has created a new type of flexible solar cell, which they say can completely change the future of wearable technology. This solar cell is described as ultra-light and flexible, and ten times thinner than human hair. The team said that the shelf life of this solar cell is estimated to reach 11.5 years, and the degradation rate during operation is extremely low.
Another key feature of this technology is that batteries are cheap and can be produced quickly through a continuous printing process. The researchers described their device as a mechanically robust light absorber capable of manufacturing ultra-flexible solar cells. The power conversion efficiency of the battery after 1000 bends was 13%, and the efficiency retention rate was 97%.
The team said that its equipment can produce 130 watts of electricity per square meter. Although the 13% efficiency does not sound high, it is currently the most efficient of the organic solar cells. Tests have shown that the solar cell can be treated in a unique way, and after 4736 hours of operation, its performance has only decreased by 4.8%. The battery can run for 20,000 hours, which is about 2.5 years, with minimal performance degradation. The size of this battery is very small, only 2 cm square, light weight, can be supported by petals, and at the same time can produce 9.9 watts of power per gram of battery.
Scientists believe that after further testing, the device can be used as a battery replacement for various devices such as mobile phones, watches, Internet of Things devices and biosensors. The researchers developed the material with a simple post-annealing method to improve the mechanical stability and final stability of the organic battery. The small size of this cell makes it possible to produce low-cost solar cells through a continuous printing method, which makes it ideal for mass production.
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