Ren Kuankuan, Xiang Yanhong, Dong Keqian, Yue Shizhong, Li Chunhe, Fang Zebo, Feng Fei
Zhejiang Engineering Research Center of MEMS, School of Mathematical Information, Shaoxing University, Shaoxing, 312000, China.
State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.
Small. 2024 Dec;20(51):e2406681. doi: 10.1002/smll.202406681. Epub 2024 Oct 10.
Exploring new low-cost and controllable synthesis methods for perovskite nanowires plays an important role in achieving their large-scale applications. However, there have been no studies on the synthesis of cesium lead halide nanowires using the electrodeposition method. In this study, the single-crystal mixed-halide W-CsPbIBr nanowires are first synthesized via a low-cost and controllable electrodeposition method. The growth process of the W-CsPbIBr nanowires is observed in situ by using a metallurgical microscope. It is found that the W-CsPbIBr nanowires are grown via the oriented attachment of B-CsPbIBr nanocubes. More importantly, the mixed-halide W-CsPbIBr nanowires can transform into single-crystal B-CsPbIBr nanowires at a moderate annealing temperature. The obtained B-CsPbIBr nanowires are applied to nanolasers, and two lasing peaks are observed at 679 and 675 nm, with a threshold of 277.6 µJ cm. These results can promote the development of growth methods for perovskite nanomaterials, which can broaden the applicability of perovskite nanowires in integrated nanophotonic and optoelectronic devices.
探索钙钛矿纳米线新的低成本且可控的合成方法对于实现其大规模应用具有重要作用。然而，尚未有关于使用电沉积法合成铯铅卤化物纳米线的研究。在本研究中，首次通过低成本且可控的电沉积法合成了单晶混合卤化物W-CsPbIBr纳米线。利用金相显微镜原位观察W-CsPbIBr纳米线的生长过程。发现W-CsPbIBr纳米线是通过B-CsPbIBr纳米立方体的定向附着生长而成。更重要的是，混合卤化物W-CsPbIBr纳米线在适度退火温度下可转变为单晶B-CsPbIBr纳米线。将所得的B-CsPbIBr纳米线应用于纳米激光器，在679和675nm处观察到两个激光峰，阈值为277.6µJ/cm²。这些结果可推动钙钛矿纳米材料生长方法的发展，这能够拓宽钙钛矿纳米线在集成纳米光子和光电器件中的适用性。
