jz8b01466_si_001.pdf (1.32 MB)
Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo
journal contribution
posted on 2018-06-14, 00:00 authored by Aleksandar R. Milosavljević, Dušan K. Božanić, Subha Sadhu, Nenad Vukmirović, Radovan Dojčilović, Pitambar Sapkota, Weixin Huang, John Bozek, Christophe Nicolas, Laurent Nahon, Sylwia PtasinskaWe
report an investigation of lead halide perovskite CH3NH3PbBr3 nanocrystals and associated ligand
molecules by combining several different state-of-the-art experimental
techniques, including synchrotron radiation-based XPS and VUV PES
of free-standing nanocrystals isolated in vacuum. By using this novel
approach for perovskite materials, we could directly obtain complete
band alignment to vacuum of both CH3NH3PbBr3 nanocrystals and the ligands widely used in their preparation.
We discuss the possible influence of the ligand molecules to apparent
perovskite properties, and we compare the electronic properties of
nanocrystals to those of bulk material. The experimental results were
supported by DFT calculations.