Abstract In this paper, we report a simple one-pot strategy to synthesize highly stable SiO2-coated orange-yellow CsPb0.7Mn0.3Br0.75Cl2.25 quantum dots with strong orange-yellow photoluminescence. The microstructure characterization indicates that the CsPb0.7Mn0.3Br0.75Cl2.25 quantum dots were effectively encapsulated by the SiO2. The SiO2-coated CsPb0.7Mn0.3Br0.75Cl2.25 quantum dots show higher humidity stability and thermal stability than the CsPb0.7Mn0.3Br0.75Cl2.25 quantum dots without SiO2 coating. The white light-emitting diodes (WLEDs) were obtained by coating orange-yellow CsPb0.7Mn0.3Br0.75Cl2.25@SiO2 and blue CsPbBrCl2@SiO2 quantum dots on the ultraviolet gallium nitride light-emitting diode chip. The as-prepared white light-emitting diodes show bright white light emission with a color coordinate of (0.3347, 0.2825), color rendering index of 82 and correlated color temperature of 5329 K. The results provide a simple method to fabricate stable orange-yellow luminescent material for white light-emitting diodes.

中文翻译：

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室温一锅法合成高稳定性SiO2包覆Mn掺杂全无机钙钛矿CsPb0.7Mn0.3Br0.75Cl2.25量子点，用于亮白光发光二极管

摘要 在本文中，我们报道了一种简单的一锅法合成具有强橙黄色光致发光的高度稳定的 SiO2 包覆的橙黄色 CsPb0.7Mn0.3Br0.75Cl2.25 量子点。微观结构表征表明CsPb0.7Mn0.3Br0.75Cl2.25量子点被SiO2有效地包封。SiO2 涂层的 CsPb0.7Mn0.3Br0.75Cl2.25 量子点比没有 SiO2 涂层的 CsPb0.7Mn0.3Br0.75Cl2.25 量子点表现出更高的湿度稳定性和热稳定性。通过在紫外氮化镓发光二极管芯片上涂覆橙黄色CsPb0.7Mn0.3Br0.75Cl2.25@SiO2和蓝色CsPbBrCl2@SiO2量子点获得白色发光二极管（WLED）。所制备的白光发光二极管发出明亮的白光，色坐标为 (0.3347, 0.2825)，