Tricolor White-Light-Emitting Carbon Dots with Multiple-Cores@Shell Structure for WLED Application
Tricolor White-Light-Emitting Carbon Dots with Multiple-Cores@Shell Structure for WLED Application
复制标题
用于WLED应用的多核@壳结构三色白光碳点
DOI：
10.1021/acsami.8b03529
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发表时间：
2018-06-13
影响因子：
9.5
通讯作者：
Lu, Changli
中科院分区：
文献类型：
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作者：
Zhang, Tianyi;Zhao, Feifei;Lu, Changli
过去几年，碳点（CD）因其出色的光学性能和广泛的应用而迅速发展。然而，具有长波长蓝光发射的CD的设计和控制对于它们在不同领域的实际应用仍然是巨大的挑战。以5-氨基-1，10-邻菲罗啉和柠檬酸为原料，采用一锅水热法制备了具有红、绿色、蓝三色发光的氮掺杂多核@壳结构AC-CD，并对AC-CD的生长过程进行了监控。利用AC-CD表面基团的独特配位能力，探索了不同荧光发射的起源。结果表明，所制备的AC-CD的荧光性质具有明显的浓度依赖性，通过调节AC-CD的浓度可以获得67%的高荧光量子产率（QY）。通过调节多核@壳结构的AC-CD的激发和浓度，从QY为29%的单个碳点进行纯白光发射（0.33，0.33; Commission Internationale de l 'Elcairage坐标）。此外，由于其优异的光致发光性能，AC-CD作为白光发光材料，具有良好的抗光漂白性能和温度稳定性，可用于白光发光二极管的制备。
The past few years have witnessed the rapid development of carbon dots (CDs) due to their outstanding optical properties and a wide range of applications. However, the design and control of CDs with long-wavelength multicolor emission are still huge challenges to be addressed for their practical use in different fields. Here, novel nitrogen-doped multiple-core@shell-structured AC-CDs with tricolor emissions of red, green, and blue were constructed via one-pot hydrothermal method from 5-amino-1,10-phenanthroline and citric acid as reactants and the growth process of AC-CDs was monitored with the reaction time in the synthetic system. The origin of different fluorescence emissions was explored using the unique coordination ability of the surface groups of AC-CDs. An obvious concentration dependence of fluorescent properties was observed for the as-prepared AC-CDs, and a highly fluorescent quantum yield (QY) of 67% for red emission at 630 nm can be obtained by adjusting concentration of AC-CDs. The pure white-light emission (0.33, 0.33; Commission Internationale de l'Elcairage coordinate) was carried out from single carbon dot with QY of 29% through regulation of the excitation and concentration of multiple-core@shell-structured AC-CDs. In addition, because of their excellent photoluminescent properties, the white-emitting AC-CDs as emitting phosphor can be easily used in the fabrication of white-light-emitting diode with good anti-photobleaching and temperature stability.