Recently, vacancy-ordered double perovskite phosphors have garnered significant attention due to their high quantum efficiency, elevated carrier mobility, and favorable fluorescence properties. Vacancy ordered double perovskite phosphors has poor fluorescence properties due to the high number of vacancies. The fluorescence characteristics and stability can be enhanced through strategic ion doping. This study synthesized Zr⁴⁺ ion-doped Cs₂SnCl₆: 5%Te using hydrochloric acid-assisted precipitation method. The inclusion of Zr⁴⁺ ions in proper proportions facilitated Jahn-Teller structural distortion in Te⁴⁺, thereby enhancing the generation of bright yellow-green emission. The photoluminescence quantum yield (PLQY) achieved a peak of 70.9% at a Zr⁴⁺ ion doping level of 15%. Furthermore, a water stability test was conducted on the phosphors. At 15% doping with Zr ions, The Cs₂Zr_0.15Sn_0.8Cl₆: 5%Te phosphors demonstrated a remarkable stability, which maintained 100% of its initial fluorescence intensity after immersion in water for 14 hours, proving the excellent stability of the phosphors against water exposure. A white light-emitting diode (WLED) with color coordinates of (0.3486, 0.364), a correlated color temperature of 4915 K, and a color-rendering index (Ra) of 86 was prepared using Cs₂Zr_0.15Sn_0.8Cl₆: 5%Te phosphor. This development offers a novel and eco-friendly approach to solid state lighting.

中文翻译：

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Zr4+ 离子掺杂 Cs2SnCl6 的增强荧光和水稳定性：用于高性能 WLED 的 5%Te 荧光粉


最近，空位有序双钙钛矿荧光粉因其高量子效率、高载流子迁移率和良好的荧光特性而受到广泛关注。空位排序双钙钛矿荧光粉由于空位数量多，荧光性能较差。通过策略离子掺杂可以增强荧光特性和稳定性。本研究采用盐酸辅助沉淀法合成了 Zr⁴⁺ 离子掺杂的 Cs₂SnCl₆：5%Te。以适当比例包含 Zr⁴⁺ 离子促进了 Te⁴⁺ 中的 Jahn-Teller 结构畸变，从而增强了亮黄绿色发射的产生。光致发光量子产率 （PLQY） 在 Zr⁴⁺ 离子掺杂水平为 15% 时达到 70.9% 的峰值。此外，还对荧光粉进行了水稳定性测试。在 15% 掺杂 Zr 离子时，Cs₂Zr_0.15Sn_0.8Cl₆：5%Te 荧光粉表现出显著的稳定性，在水中浸泡 14 小时后仍保持 100% 的初始荧光强度，证明了荧光粉对水暴露的优异稳定性。使用 Cs₂Zr_0.15Sn_0.8Cl₆： 5%Te 荧光粉制备了色坐标为 （0.3486， 0.364）、相关色温为 4915K、显色指数 （Ra） 为 86 的白色发光二极管 （WLED）。这一发展为固态照明提供了一种新颖且环保的方法。