Teams of researchers from numerous institutions in China have achieved direct lithography of compositionally adjustable perovskite nanocrystals inside glass.In their paper published in the journal ChemistryThe group describes their experiments involving direct lithography of colored perovskite nanocrystals (PNCs) that yield the desired pattern.
Perovskite is a type of mineral with certain desirable properties: optical properties Useful for creating fuel cells, Electronic device, Cathode and LED etc. However, as researchers have pointed out, the treatment of minerals usually involves the use of special solutions, and it is noted that structural stability is further reduced. They also state that recent previous work on incorporating NCs into glass has been used to obtain photonic functions from minerals, but it is difficult to achieve. In this new initiative, researchers have developed a new approach. Performs compositionally adjustable 3D direct lithography using ultrafast laser pulses. Perovskite NC. Their approach used a laser to heat the glass and also increase the pressure. As a result, the liquid nanophase was separated.
Researchers used oxide glass made of lead, cesium, and halides that had been treated to remove impurities. We then used a trial-and-error approach to fine-tune the laser that elicits the structure inside the glass sample. Then a laser was used to etch the 3D pattern onto the glass. The first attempt involved etching pixel dots with different emission wavelengths and showed the possibility of using techniques for manufacturing micrometer sized LEDs. Researchers tracked it by etching a three-dimensional colored pattern containing images of letters, numbers, and symbols.They also demonstrated the possibility of etching colorful arrays and creating them using their technique. GlassBase memory device.
Researchers note that the etching process can be changed by changing the timing of the pulses. laser.. They also note that this process can be used to create materials for use in optical applications by etching patterns with the desired wavelength adjustment.They also point out that the manufactured products are much more stable than the products used in solution. etching— Even when exposed to temperature fluctuations and other environmental conditions.
Ke Sun et al, 3D direct lithography of stable perovskite nanocrystals in glass, Chemistry (2022). DOI: 10.1126 / science.abj2691
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Realization of direct lithography of perovskite NC with adjustable composition inside glass
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