Xu Leimeng, Li Jianhai, Dong Yuhui, Xue Jie, Gu Yu, Zeng Haibo, Song Jizhong
School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China.
MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China.
ACS Appl Mater Interfaces. 2019 Jun 12;11(23):21100-21108. doi: 10.1021/acsami.9b04761. Epub 2019 May 28.
Intriguing optoelectronic features of low-dimensional perovskites drive researchers to develop novel nanostructures for exploring new photophysical properties and meeting the requirements of future practical applications. Here, we report the facile and universal synthesis of metal halide perovskite nanotubes (NTs) in a micro alkylammonium emulsion system for the first time. The [PbBr]-based NTs with a diameter of 300 nm and length of 100 μm were synthesized through the reaction of PbBr and long-chain bromide in advance, which can be controllably converted into general metal halide perovskite APbBr (A = Cs, FA, MA) with preserved tubular morphology by introducing the Cs, MA, and FA cations. Importantly, the NTs can readily couple with other nanofillers exhibiting tunable and novel optoelectronic properties demonstrated by the photodetectors. The device performance can be significantly improved and broadened to infrared photoresponse through the introduction of Au nanocrystal (NC) plasma and PbS NCs, respectively. These results demonstrate that the metal halide perovskite NTs are expected to enrich the diversity of nanostructures and have a huge potential in the fabrication of integrated, light-manipulated, and miniaturized electronic and photonic devices.
低维钙钛矿引人入胜的光电特性驱使研究人员开发新型纳米结构，以探索新的光物理性质并满足未来实际应用的需求。在此，我们首次报道了在微烷基铵乳液体系中简便且通用地合成金属卤化物钙钛矿纳米管（NTs）。通过预先使PbBr与长链溴化物反应合成了直径为300 nm、长度为100 μm的基于[PbBr]的NTs，通过引入Cs、MA和FA阳离子，其可可控地转化为具有保留管状形态的通用金属卤化物钙钛矿APbBr（A = Cs、FA、MA）。重要的是，NTs能够轻松地与其他纳米填料耦合，光探测器展示出其具有可调谐且新颖的光电特性。通过分别引入金纳米晶体（NC）等离子体和PbS NCs，器件性能可得到显著改善并拓宽至红外光响应。这些结果表明，金属卤化物钙钛矿NTs有望丰富纳米结构的多样性，并在集成、光控和小型化电子及光子器件的制造中具有巨大潜力。
