Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo
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AuthorsMilosavljević, Aleksandar R.
Božanić, Dušan K.
Bozek, John D.
Article (Published version)
© 2018 American Chemical Society
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We 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.
Source:Journal of Physical Chemistry Letters, 2018, 9, 13, 3604-3611
- U.S. Department of Energy Office of Science, Office of Basic Energy Sciences (DE-FC02-04ER15533 (NDRL no: 5205))
- Modeling and Numerical Simulations of Complex Many-Body Systems (RS-171017)
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-172056)
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
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- SOLEIL synchrotron radiation facility (20170609)
- SOLEIL synchrotron radiation facility (20160324)