title: Colloidal Synthesis of CH3NH3PbBr3Nanoplatelets with Polarized Emission through Self-Organization.
abstract: We report a combined experimental and theoretical study of the synthesis of CH3NH3PbBr3nanoplatelets through self-organization. Shape transformation from spherical nanodots to square or rectangular nanoplatelets can be achieved by keeping the preformed colloidal nanocrystals at a high concentration (3.5 mg mL-1) for 3 days, or combining the synthesis of nanodots with self-organization. The average thickness of the resulting CH3NH3PbBr3nanoplatelets is similar to the size of the original nanoparticles, and we also noticed several nanoplatelets with circular or square holes, suggesting that the shape transformation experienced a self-organization process through dipole-dipole interactions along with a realignment of dipolar vectors. Additionally, the CH3NH3PbBr3nanoplatelets exhibit excellent polarized emissions for stretched CH3NH3PbBr3nanoplatelets embedded in a polymer composite film, showing advantageous photoluminescence properties for display backlights.
authors.affiliation: School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Lige
authors.initials: L
authors.lastname: Liu
authors.affiliation: Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science & Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Huang
authors.affiliation: School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Longfei
authors.initials: L
authors.lastname: Pan
authors.affiliation: School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Li-Jie
authors.initials: LJ
authors.lastname: Shi
authors.affiliation: School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Bingsuo
authors.initials: B
authors.lastname: Zou
authors.affiliation: School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Luogen
authors.initials: L
authors.lastname: Deng
authors.affiliation: Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science & Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Haizheng
authors.initials: H
authors.lastname: Zhong
keywords: halide perovskites; nanodots; nanoplatelets; photoluminescence; polarization