Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self-Organization

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• 作者：Lige Liu ; Sheng Huang ; Longfei Pan ; Dr. Li-Jie Shi ; Prof. Bingsuo Zou ; Prof. Luogen Deng and Prof. Haizheng Zhong
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：February 6, 2017
• 年：2017
• 卷：129
• 期：7
• 页码：1806-1809
• 全文大小：3432K
• ISSN：1521-3757

文摘

We report a combined experimental and theoretical study of the synthesis of CH₃NH₃PbBr₃ 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 CH₃NH₃PbBr₃ 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 CH₃NH₃PbBr₃ nanoplatelets exhibit excellent polarized emissions for stretched CH₃NH₃PbBr₃ nanoplatelets embedded in a polymer composite film, showing advantageous photoluminescence properties for display backlights.