Zhang Dong-Ming, Zu Ke-Lei, Yu Mu-Bing, Chen Nan, Hu Jun-Tao, Dong Qi-Long, Shi Chang-Sheng, Wang Deng-Ke, Ding Huai-Yi, Leng Mei, Zhao Yong-Biao, Lu Zheng-Hong
Department of Physics, School of Physics and Astronomy, Yunnan University, Kunming 650500, China.
Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering, School of Physics and Astronomy, Yunnan University, Kunming 650500, China.
J Phys Chem Lett. 2024 Aug 8;15(31):7892-7900. doi: 10.1021/acs.jpclett.4c02009. Epub 2024 Jul 26.
Low-dimension metal halide perovskites are attractive for bandgap tunable optoelectronic materials. Among them, 1-D CsPbBr quantum wires (QWs) are emerging as promising deep-blue luminescent material. However, the growth dynamics of 1-D perovskite QWs are intricate, making the study and control of 1-D QWs highly challenging. In this study, a strategy for controlling both the length and width of the CsPbBr QWs was realized. The temperature-dependent isotropic growth mechanism was revealed and employed as the main tool for the oriented growth of 1-D CsPbBr QWs for various aspect ratios. Our results pave the way for the controlled synthesis of ultrasmall perovskite nanocrystals.
低维金属卤化物钙钛矿对于带隙可调谐的光电子材料具有吸引力。其中，一维CsPbBr量子线（QWs）正成为有前景的深蓝色发光材料。然而，一维钙钛矿量子线的生长动力学很复杂，使得对一维量子线的研究和控制极具挑战性。在本研究中，实现了一种控制CsPbBr量子线长度和宽度的策略。揭示了温度依赖性各向同性生长机制，并将其用作实现不同纵横比的一维CsPbBr量子线定向生长的主要工具。我们的结果为超小钙钛矿纳米晶体的可控合成铺平了道路。
