| K+/Na+比例的调控对双钙钛矿Cs2NaBiCl6:Mn2+结构和光学性质的影响 | |
| Effect of regulating K+/Na+ ratio on the structure and optical properties of double perovskite Cs2NaBiCl6:Mn2+ | |
| 摘要: 采用溶剂热法合成了一系列Cs2NaBiCl6:Mn2+与Cs2Na1-xKxBiCl6:Mn2+荧光粉，并通过理论计算与实验表征相结合的方式系统研究了其晶体结构和发光性能。结果表明，Cs2NaBiCl6:Mn2+体系表现出以[BiCl6]3-八面体为中心的局域激发吸收近紫外光，随着Mn2+掺杂浓度的增加，[BiCl6]3-向Mn2+发生能量转移，从而促进了Mn2+的d轨道之间的电子跃迁并产生橙黄色发光。进一步引入 K+后，Cs2NaBiCl6:Mn2+发光强度和颜色纯度得到提升。实验证实 K+的引入有效调谐了 Cs2NaBiCl6:Mn2+的态密度组成，促进了[BiCl6]3-的 1S0→3P1,2电子跃迁，增强了Cs2NaBiCl6:Mn2+的发光强度，并利用CIE软件计算得到其色纯度为93.58%。最终结果表明，Cs2Na1-xKxBiCl6:Mn2+具有较强的橙黄色发光特性。 | |
| 关键词: Cs2NaBiCl6|Mn2+|双钙钛矿|掺杂|光学性能 | |
| 基金项目: 国家自然科学基金(No.52072086)资助。 | |
| Abstract: A series of Cs2NaBiCl6:Mn2+ and Cs2Na1-xKxBiCl6:Mn2+ phosphors were synthesized using a solvothermal method. Crystal structures and optical properties were systematically studied through theoretical calculations and experimental measurements. The results showed that in the Cs2NaBiCl6:Mn2+ system, localized excitation absorption near ultraviolet light centered on the [BiCl6]3- octahedron was observed. With the increase of Mn2+ doping concentration, energy transfer from [BiCl6]3- to Mn2+ promoted electronic transitions between the d orbitals of Mn2+ and produced orange‐yellow luminescence. After further introducing K+, the photoluminescence (PL) intensity and color purity of Cs2NaBiCl6:Mn2+ were enhanced. It was confirmed that the introduction of K+ effectively tuned the density of states composition of Cs2NaBiCl6:Mn2+ and promoted the 1S0→3P1,2 electron transition of [BiCl6]3-, thus enhancing the PL intensity of Cs2NaBiCl6:Mn2+, and the color purity was calculated to be 93.58% using CIE software. The final results suggested that Cs2Na1-xKxBiCl6:Mn2+ had strong orange‐yellow luminescent properties. | |
| Keywords: Cs2NaBiCl6|Mn2+|double perovskite|doping|optical property | |
| 投稿时间：2024-11-28 修订日期：2025-05-08 | |
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