Engineers have presented a new technology for creating photovoltaic cells. Solar panels based
The researchers used a semiconductorgallium arsenide to create two types of photovoltaic devices. One of them was a design on a chip, created by stacking various materials on top of each other. The cells included an ultra-thin layer of light-absorbing gas, which is the key to their resistance to radiation.
In the second case, additionally usedsilver rear mirror for improved light absorption. The thickness of both devices did not exceed 120 nm. It is about a thousand times thinner than a human hair.
Scheme of two types of elements. Image: Barthel et al., Journal of Applied Physics
To test the stability of the structure againstexternal influences, the researchers irradiated the created photovoltaic cells with protons that imitate cosmic radiation. Testing has shown that ultra-thin designs are much better able to withstand external impacts.
Solar panels are widely used inspace research. However, modern structures accumulate defects over time under the influence of radioactive irradiation. At the same time, electricity generation is reduced.
The researchers believe that the new technologywill extend the life of solar panels and increase the efficiency and duration of space missions. In addition, low weight will reduce the size of the payload, and hence the cost of putting satellites into orbit.
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On the cover: ultra-thin photovoltaic cells. Image: Armin Barthel