Abstract
Engineering the surface energy through careful manipulation of the surface chemistry is a convenient approach to control quantum confinement and structure dimensionality during nanocrystal growth. Here, we demonstrate that the introduction of pyridine during the synthesis of methylammonium lead bromide (MAPbBr3) perovskite nanocrystals can transform three-dimensional (3D) cubes into two-dimensional (2D) nanostructures. Density functional theory (DFT) calculations show that pyridine preferentially binds to Pb atoms terminating the surface, driving the selective 2D growth of the nanostructures. These 2D nanostructures exhibit strong quantum confinement effects, high photoluminescence quantum yields in the visible spectral range, and efficient charge transfer to molecular acceptors. These qualities indicate the suitability of the synthesized 2D nanostructures for a wide range of optoelectronic applications.
Original language | English (US) |
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Pages (from-to) | 4393-4400 |
Number of pages | 8 |
Journal | Chemistry of Materials |
Volume | 29 |
Issue number | 10 |
DOIs | |
State | Published - May 23 2017 |
Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Materials Chemistry