Plasmon enhanced colloidal nanocrystal composites incorporating Au nanoparticles in a repeating layered architecture

In summary, we presented plasmonic high-efficiency Au-CdTe nanocomposite films in a three-dimensional construction of repeating layers. These composites integrate Au nanoparticles at a fixed optimal dielectric spacing and plasmon-couple them with CdTe nanocrystal emitters for significantly enhanced emission. In the Au-CdTe nanocomposite film, we showed that the emission of CdTe NCs is increased by 4.37 fold and the quantum efficiency is increased by 43%, reaching a high level of 30% in film. This proof-of-concept demonstration of plasmonic AuCdTe nanocomposite films opens a new direction for the development of future NC-based optoelectronic devices.