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Painting with ink that you only see when it lands on the canvas: it may seem mysterious, but it is “ just ” a new technique from materials science that can have a major impact on the new generation of solar cells and LEDs.
AMOLF researchers Lukas Helmbrecht and Wim Noorduin have developed a reactive ink which – in combination with the right substrate – becomes a semiconductor that emits colored light. The ink itself does not emit light, neither does the background and both have no color, but if they come into contact with each other, they react to each other and you get colored light in the right setting.
Why is this an improvement over what already existed? It is about making perovskite, a promising material that is important for this new generation of solar cells and LEDs. With the old techniques, you needed several layers of different types of perovskite to get the right colors for your phone screen, for example. With this new technique you only need one coat which can take care of all these colors and which is also easier to apply. Less material and less effort.
You can find the article here: Ion exchange lithography: localized ion exchange reactions for spatial modeling of perovskite semiconductors and insulators.
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