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Colloidal Synthesis of CH 3 NH 3 PbBr 3 Nanoplatelets with Polarized Emission through Self‐Organization
Author(s) -
Liu Lige,
Huang Sheng,
Pan Longfei,
Shi LiJie,
Zou Bingsuo,
Deng Luogen,
Zhong Haizheng
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201610619
Subject(s) - nanodot , colloid , nanocrystal , materials science , nanoparticle , square (algebra) , dipole , photoluminescence , chemical engineering , composite number , nanotechnology , self assembly , chemical physics , optoelectronics , chemistry , composite material , geometry , mathematics , organic chemistry , engineering
We report a combined experimental and theoretical study of the synthesis of CH 3 NH 3 PbBr 3 nanoplatelets 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 CH 3 NH 3 PbBr 3 nanoplatelets 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 CH 3 NH 3 PbBr 3 nanoplatelets exhibit excellent polarized emissions for stretched CH 3 NH 3 PbBr 3 nanoplatelets embedded in a polymer composite film, showing advantageous photoluminescence properties for display backlights.