School of Physics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
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.
Angew Chem Int Ed Engl. 2017 Feb 6;56(7):1780-1783. doi: 10.1002/anie.201610619. Epub 2017 Jan 11.
We report a combined experimental and theoretical study of the synthesis of CH NH PbBr 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 ) for 3 days, or combining the synthesis of nanodots with self-organization. The average thickness of the resulting CH NH PbBr 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 NH PbBr nanoplatelets exhibit excellent polarized emissions for stretched CH NH PbBr nanoplatelets embedded in a polymer composite film, showing advantageous photoluminescence properties for display backlights.
我们通过自组装报告了 CH NH PbBr 纳米板的合成的实验和理论研究。通过将预先形成的胶体纳米晶体在高浓度（3.5mg/mL）下保持 3 天，或者将纳米点的合成与自组装相结合，可以实现从球形纳米点到方形或矩形纳米板的形状转变。所得 CH NH PbBr 纳米板的平均厚度与原始纳米颗粒的尺寸相似，我们还注意到一些具有圆形或方形孔的纳米板，表明形状转变经历了一个通过偶极-偶极相互作用以及偶极矢量重新排列的自组织过程。此外，在聚合物复合膜中嵌入拉伸的 CH NH PbBr 纳米板的 CH NH PbBr 纳米板表现出优异的偏振发射，为显示背光灯提供了有利的光电性能。
