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Chemistry platform for the ultrafast continuous synthesis of high quality III-V quantum dots.

A chemistry platform for the fast continuous synthesis of III-V quantum dots is demonstrated. III-nitride QDs are prepared using short residence times (less than 30 s) in a one-step continuous process with supercritical solvents. GaN QDs prepared via this route exhibit strong UV photoluminescence with a structuring of the emission signal at low temperature (5K), confirming their high quality. An example of metal site substitution is given with the synthesis of InxGa1-xN solid solution. A continuous bandgap shift towards lower energies is demonstrated when increasing indium content with strong photoluminescence signals from UV to visible. The chemistry platform proposed could be easily extrapolated to binary and ternary III phosphides or arsenides with the homologous V source.