Self-assembled template-confined growth of ultrathin CsPbBr3 nanowires
Self-assembled template-confined growth of ultrathin CsPbBr3 nanowires
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超细 CsPbBr3 纳米线的自组装模板限制生长
DOI：
10.1016/j.apmt.2019.100449
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发表时间：
2020-03
影响因子：
8.3
通讯作者：
Zhipeng Ci
中科院分区：
文献类型：
--
作者：
Linghui Zhang;Qisheng Sun;Youkui Xu;Lili Han;Qian Wang;Yangchun Yu;Zhiwen Jin;Shikuan Yang;Zhipeng Ci
由于CsPbBr3晶体生长速度极快，超薄(如∼2 nm)CsPbBr3纳米线的制备对现有方法仍然具有挑战性。在这里，我们发展了一种自组装纳米模板约束生长的概念来制备超薄的CsPbBr3纳米线。在使用由聚甲基丙烯酸甲酯(PMMA)、PbBr2、CsBr3和封端剂组成的N，N-二甲基甲酰胺(DMF)溶液的电纺过程中，PMMA链将组装成纳米通道，在电纺PMMA纤维中充当纳米模板。由于纳米通道中前驱体的数量非常有限，通过DMF蒸发制备了超薄的CsPbBr3纳米线。在PMMA纤维中或分散在甲苯中的CsPbBr3纳米线显示出明亮的蓝色发光。CsPbBr3产物的结构可以通过搅拌时间以及PMMA、PbBr2和CsBr3在DMF中的用量来调整。综上所述，我们开发了一种在电纺过程中通过自组装模板限制生长的概念来工程化超细CsPbBr3纳米结构的新方法，这可能会在蓝光发光二极管和其他光电子器件中找到潜在的应用。
Fabrication of ultrathin (e.g., ∼2 nm) CsPbBr3 nanowires is still challenging for existing methods, for the extremely fast crystal growth process of CsPbBr3. Here, we developed a self-assembled nanotemplateconfined growth concept to prepare ultrathin CsPbBr3 nanowires. During electrospinning using the N,N-dimethylformamide (DMF) solution composed of polymethyl methacrylate (PMMA), PbBr2, CsBr, and capping agents, PMMA chains would assemble into nanochannels acting as nanotemplates within the electrospun PMMA fibers. Owing to the very limited amount of precursors within the nanochannels, ultrathin CsPbBr3 nanowires were prepared after DMF evaporation. The CsPbBr3 nanowires within the PMMA fibers or dispersed in toluene showed bright blue luminescence. The structure of the CsPbBr3 products could be adjusted by the stirring time, as well as the amount of PMMA, PbBr2, and CsBr in DMF. Overall, we developed a new method towards engineering ultrafine CsPbBr3 nanostructure through self-assembled template-confined growth concept during electrospinning, which may find potential applications in blue light emitting diodes and other optoelectronic devices.
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