One step closer to the vision of turning windows into energy sources. This is how the research team describes their breakthrough, where they developed solar cells with high efficiency and high light transmission.
It has been described as “solar windows”, ie panels that act as both solar cells and ordinary windows. And now I mean researchers in Australia that an important step has been taken towards the dream of self-sufficient skyscrapers.
The technology where semi-transparent solar cells replace window glass has developed rapidly in recent years and some that are at the forefront are a research group at Monash Unviersty. Two years ago, they showed a prototype that had an efficiency of 17 percent and still let through 10 percent of the visible light.
Now, two more perovskit alternatives have been developed that certainly do not have the same efficiency – but which are more window-like.
These two have efficiencies of 15.5 and 4.1 percent, respectively, but the big advantage is that they let through 20.7 and 52.4 percent of the light. And it is precisely light penetration that gives them a wider area of use.
– This work is a big step forward towards realizing high efficiency and stable perovskit units that can be used as solar windows to access a completely untapped market, says project manager Jack Jaseniak in a statement.
In the perovskite cells used by the team, it has been concluded that a combination of cesium and formamidinium are the ones that give the best performance. But not only that, the chemical composition also showed radiant stability over time when tested for long exposure to light and heat – that is, the type of environment in which they are intended to be used.
The research has been published in Advanced Science and it appears that after 1,000 hours of constant light, the solar cells still had 85 percent of their initial efficiency left.
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