Research Projects

Two-dimensional (2D) nanoplatelets (NPLs) have shown unique spectroscopic properties, such as fast lifetimes, high color purity, and suppressed Auger recombination due to stricter momentum selection rules. Recent successes with CdSe NPLs have demonstrated the potential for NPLs in future photonic devices. However, the regulation of toxic heavy metals hinders their widespread application in the photonic industry. The development of luminescent NPLs made of nontoxic metals is essential for the implementation of 2D materials in lighting technology. Indium phosphide (InP)-based quantum dots are well-established photonic materials and have been successfully applied in QLED TV. This study proposes designing a 2D nanostructure of InP and investigating their opto-electronic properties for potential application in LEDs. There is currently no direct synthesis method for InP NPLs, but colloidal routes using single source precursors can improve control of final size and shape. Optical properties will be manipulated by making the shell or crown of ZnS, ZnSe, or GaP using colloidal heterostructure engineering. With steady-state and ultrafast optical spectroscopy at room and cryogenic temperatures, feedback on NPL synthesis can be obtained, allowing for optimization and obtaining a prototype device like an LED. These electrically driven, wavelength-selected light sources can find applications for ultrapure lighting and display, with their efficiency relying on optimized material parameters.