Doping in solution vs. doping in plasma Principal Investigators

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Efficient and uniform doping of zinc oxide nanocrystals via plasma synthesis Doping in solution vs. doping in plasma Principal Investigators Eray Aydil, Uwe Kortshagen, Andre Mkhoyan (IRG-2) Description and Significance Doping is essential for controlling the optical and electronic properties of compound semiconductor nanocrystals. In solution-based synthesis, often doping efficiencies are low and dopants are excluded from the nanocrystals’ central cores. The research team developed a fundamentally different plasma-based process for synthesizing aluminum-doped zinc oxide nanocrystals. Due to the high chemical reactivities of the doping species in the plasma, dopants were incorporated irreversibly throughout nanocrystal growth, resulting in high doping efficiency and uniform dopant distribution. Supported by UMN MRSEC Award DMR# 1420013 Kortshagen, Aydil, Mkhoyan et al. Nano Lett. 2015, 15, 8162–8169.

Efficient incorporation Chemical potential Synthesis time Plasma Solution Zn/Al in gas-phase ions/radicals Zn in NC Al in NC Zn/Al in solvated species High reactivity Efficient incorporation Uniform distribution