St Petersburg University scientists have found a new way to create rod-shell whisker-like nanocrystals from indium, gallium and nitrogen. They managed to achieve a high indium content in the core of such nanocrystals, which opens prospects for new technologies in optoelectronics. The researchers noted that their structure shields intense radiation even at room temperature, which is especially important for LEDs, lasers and solar panels.
The InGaN alloy used in electronics has limitations due to difficulties in synthesizing stable layers. Traditional methods of applying the material are faced with the formation of defects and delaminations. Scientists announced that their new approach makes it possible to create nanocrystals directly on the silicon substrate. This became possible thanks to a mechanism by which the indium content in the rod reached 40%, and in the shell – about 4%, significantly exceeding previous figures.
The resulting nanostructures exhibit high optical quality, and their properties make it possible to vary the emission wavelength. Project leader Rodion Reznik explained that the growth of the rod is ensured by the balance of atoms in the initial stage, when the conditions change, the next shell is formed. This method opens up new possibilities for creating LEDs and lasers with advanced properties.
Source: Ferra
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