Proposing a simple strategy for developing full-color carbon quantum dots (CQDs) and exploring how the luminescence can be tuned and improved is attractive and encouraging. Herein, blue, green, yellow-green, and orange-red CQDs doped with heteroatoms were synthesized in one pot and separated by column chromatography, with emission peaks of 435 nm, 495 nm [photoluminescence quantum yield (PLQY) of 88.9%], 525 nm, and 595 nm (full width at half-maximum of 31 nm), respectively. The abundant C–O/C–O–C electron donor groups greatly improve the PLQY of green CQDs, and the expended effective conjugated domains (particle size, doped chlorine, and conjugated nitrogen) of CQDs boost the red-shifts of emission spectra. Energy transfer (ET) in a concentrated mixed solution of CQDs was discovered, and possible ET mechanisms are proposed. Furthermore, a high-efficiency white light-emitting diode with Commission Internationale de L’Eclairage coordinates of (0.361, 0.369), a correlated color temperature of 4534 K, and a high color rendering index of 90.8 was fabricated.

中文翻译：

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基于掺杂策略的全色碳量子点一步绿色溶剂热合成

提出一种开发全色碳量子点 (CQD) 的简单策略并探索如何调整和改进发光是有吸引力和令人鼓舞的。在此，一锅法合成了掺杂杂原子的蓝色、绿色、黄绿色和橙红色 CQDs，并通过柱色谱分离，发射峰分别为 435 nm、495 nm [光致发光量子产率 (PLQY) 为 88.9%]，分别为 525 nm 和 595 nm（半峰全宽为 31 nm）。丰富的 C-O/C-O-C 电子供体基团极大地提高了绿色 CQDs 的 PLQY，并且 CQDs 的有效共轭域（粒径、掺杂氯和共轭氮）增加了发射光谱的红移。发现了 CQD 的浓缩混合溶液中的能量转移 (ET)，并提出了可能的 ET 机制。此外，