Composite Supraparticles with Tunable Light Emission

作者：Montanarella Federico; Altantzis Thomas; Zanaga Daniele; Rabouw Freddy T; Bals Sara; Baesjou Patrick; Vanmaekelbergh Daniel^*; van Blaaderen Alfons

来源：ACS Nano, 2017, 11(9): 9136-9142.

DOI：10.1021/acsnano.7b03975

• quantum dot
• nanocrystal
• assembly
• supraparticles
• tunable emission
• white light

Robust luminophores emitting light with broadly tunable colors are desirable in many applications such as light-emitting diode (LED)-based lighting, displays, integrated optoelectronics and biology. Nanocrystalline quantum dots with multicolor emission, from core- and shell-localized excitons, as well as solid layers of mixed quantum dots that emit different colors have been proposed. Here, we report on colloidal supraparticles that are composed of three types of Cd(Se,ZnS) core/(Cd,Zn)S shell nanocrystals with emission in the red, green, and blue. The emission of the supraparticles can be varied from pure to composite colors over the entire visible region and finetuned into variable shades of white light by mixing the nanocrystals in controlled proportions. Our approach results in supraparticles with sizes spanning the colloidal domain and beyond that combine versatility and processability with a broad, stable, and tunable emission, promising applications in lighting devices and biological research.

• 出版日期2017-9