Shi Xinyu, Li Zhilin, Cao Mengyan, Rao Zhihui, Zhao Xiujian, Gong Xiao
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Inorg Chem. 2022 Sep 5;61(35):14095-14101. doi: 10.1021/acs.inorgchem.2c02140. Epub 2022 Aug 22.
Due to the toxicity and instability issues of lead halide perovskites, lead-free perovskites have recently emerged as a viable alternative. However, significant optical band gaps of lead-free perovskites exert influence on their luminescent properties. Fortunately, the addition of dopants becomes an efficacious solution. The current widely utilized methods for synthesizing perovskites almost require high temperatures, a long period, and atmosphere protection, which cost more energy and resources. In this paper, we report that RbZrCl:Sb perovskite phosphors can be easily prepared by a wet grinding approach at room temperature, which is a more efficient and facile process. Due to the self-trapped excitons of the host structure and Sb ions, the produced samples display blue-white and orange fluorescence under UV lamp irradiation at 254 and 365 nm, respectively. In the photoluminescence spectrum, the doped perovskite exhibits an emission peak at 630 nm under excitation at 365 nm. Importantly, the prepared phosphors have tunable emissions related to the excitation wavelength. In addition, our produced powders show remarkable stability at room temperature, laying the foundations for this approach to be widely used in perovskite production.
由于卤化铅钙钛矿的毒性和稳定性问题，无铅钙钛矿最近成为一种可行的替代物。然而，无铅钙钛矿较大的光学带隙对其发光性能产生影响。幸运的是，添加掺杂剂成为一种有效的解决方案。目前广泛使用的合成钙钛矿的方法几乎都需要高温、长时间以及气氛保护，这消耗更多的能源和资源。在本文中，我们报道了RbZrCl:Sb钙钛矿荧光粉可以通过室温湿磨法轻松制备，这是一个更高效且简便的过程。由于主体结构和Sb离子的自陷激子，所制备的样品在254和365 nm的紫外灯照射下分别呈现蓝白色和橙色荧光。在光致发光光谱中，掺杂的钙钛矿在365 nm激发下在630 nm处呈现发射峰。重要的是，所制备的荧光粉具有与激发波长相关的可调发射。此外，我们制备的粉末在室温下表现出显著的稳定性，为该方法在钙钛矿生产中的广泛应用奠定了基础。
