An Alternative of CdSe Nanocrystal Emitters

The doping of semiconductor nanocrystals has posed a challenge in the production and consistent growth process of ZnSe nanocrystals. In “An Alternative of CdSe Nanocrystal Emitters: Pure and Tunable Impurity Emissions in ZnSe Nanocrystals” Narayan Pradhan, David Goorskey, Jason Thessing, and Xiaogang Peng propose to separate the doping process from nanocrystal growth. The authors describe two methods: “Growth-doping” and “Nucleation-doping”. The Growth-doping method begins with standard ZnSe nanocrystals that are then doped on the surface and then allowed to continue growing around the doped layer. The Nucleation-doping method was performed by adding the doping material prior to the formation of the nanocrystals so the doped material was at the center of the nanocrystal. These methods produce nanocrystals that remove the environmental drawbacks of using cadmium-based nanocrystals while maintaining good thermal and PL control. For more information, read the full article here.

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