Controlling the direction of light emission in anisotropic perovskite nanoparticles using alignment, fusing, and surface interactions

 

Next generation optoelectronic devices require extremely bright emitters with tunable properties, such as color tunability and preferential light emission angle, that can be produced at large scales. Perovskite nanocrystals (PNCs) are an excellent candidate for this challenge as they can achieve extremely high quantum yields with a wide color gamut and have demonstrated interesting quantum phenomena. Recently, the alignment electric dipoles within perovskite nanocrystal films, which governs angular light emission and energy transfer rates, was shown to be variable based on the local environment, which is unique to this class of materials.

 

In this talk, Eisler will describe her group’s work on exploring how surface effects and neighbor interactions are affected by assembles of CsPbBr₃ nanoparticles. They synthesized films of CsPbBr₃ nanocrystals and used back focal plane microscopy to quantify how structure, packing, and local environment drive the electronic transition alignments.