In this work, carbon nanodots (CNDs) were synthesized from extract of mango leaves. Sphere nanodots were formed rapidly by one-step microwave heating. The photoluminescence (PL) of the CNDs was found greatly dependent on the reaction temperature. The emission peak position of the CNDs changed from 550[Formula: see text]nm to 430[Formula: see text]nm when the heating temperature increased from 120[Formula: see text]C to 150[Formula: see text]C. Particularly, the CNDs synthesized at 130[Formula: see text]C showed multi-band emission at 411[Formula: see text]nm, 480[Formula: see text]nm and 530[Formula: see text]nm, providing emitting color from blue to yellow. Moreover, the free chlorophyll molecules in the solution added red fluorescence at 670[Formula: see text]nm, and the integrated emitting color of the CNDs solution was close to white. Coated on a commercial 365[Formula: see text]nm light-emitting diode (LED) chip, the CNDs showed greenish white light with CIE coordinates of (0.37, 0.44). This work provided a one-pot, rapid and green method to obtain multi-emissive CNDs toward white LEDs.

中文翻译：

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通过对白光发光二极管的反应温度对生物质衍生碳纳米点的颜色调谐

在这项工作中，碳纳米点（CNDs）是从芒果叶的提取物中合成的。通过一步微波加热快速形成球形纳米点。发现 CND 的光致发光 (PL) 很大程度上取决于反应温度。当加热温度从120[公式：见文]C升高到150[公式：见文]C时，CNDs的发射峰位置从550[公式：见文]nm变为430[公式：见文]nm。特别地，在 130[公式：见文本]C 合成的 CND 在 411[公式：见文本]nm、480[公式：见文本]nm 和 530[公式：见文本]nm 处显示出多波段发射，提供发光颜色从蓝色到黄色。此外，溶液中的游离叶绿素分子在670[式：见正文]nm处增加了红色荧光，CNDs溶液的综合发光颜色接近于白色。涂覆在商业 365 [公式：见正文]nm 发光二极管 (LED) 芯片上，CND 显示绿白光，CIE 坐标为 (0.37, 0.44)。这项工作提供了一种一锅法、快速且绿色的方法来获得针对白光 LED 的多发射 CND。