Synthesis of Bulk Nanocrystal In(As, P)

Colloidal III-V group quantum dots (QDs) are widely studied as a promising optoelectronic material, which is not restricted by regulations on hazardous substances. However, synthesizing large-sized (>10 nm) QDs even bulk nanocrystals with high-quality remains challenging. Here, we successfully synthesized In(As,P) QDs with a first excitonic absorption up to approximately 1750 nm. By suppressing the secondary nucleation, we can grow In(As, P) QDs to bulk size of 20 nm. The synthetic procedures introduced here are expected to significantly advance the development of III-V nanocrystals opto-electronic technology based on non-restricted materials.