Indium phosphide is the leading Cd-free quantum dot material for application in photoluminescence down-conversion display and lighting technologies. To date the performance of InP quantum dots has lagged behind cadmium selenide in terms of both luminescence line width and quantum yield. Extensive studies in our lab have implicated kinetically persistent magic-sized cluster intermediates as a leading contributor to polydispersity in these samples, providing new opportunities for achieving high color purity. Now, using a combination of X-ray emission and solid-state NMR spectroscopy we have studied the evolution of oxidized phosphorus species during both synthesis and shell growth. Correlations of this data with observed steady-state and time resolved absorption and luminescence will be used to reveal the role of interfacial oxidation on the luminescence properties of InP QDs.

Innovations in indium phosphide chemistry and characterization for emissive applications

2019 Spring National Meeting

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