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At the same time, our structural analyses indicate that the epitaxial constraints may be responsible for controlling the observed property peaks.
The findings may guide us more in optimizing the properties of the quaternary alloy of Bi were grown by modified Bridgman method, details can be found in the method section.
The observation of the multiband emission is possible because of relatively long recombination lifetimes.
Longer than 1 ns lifetimes for holes photoexcited to the lower valence subband offer a potential of using the alloy as an intermediate band semiconductor for solar power conversion applications.