The photoluminescent of carbon dots (CDs) was significantly quenched when CDs were densely deposited on glass substrates, which limited their applications. In this work, the luminescent enhancement of blue CDs with polymer of polyvinylpyrrolidone (PVP) is explored by coupling with an “Island” Ag film. The fluorescence intensity of CDs enhances nearly 5-fold. Furthermore, the application of Ag/CDs/PVP in LEDs was explored, the luminous efficiency is up to 39.2 lm W −1 . After 10 h of continuous operation, the luminous intensity of the blue LED can still be maintained above 95%, which suggests that the stability of this blue LED is very good.

中文翻译：

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“ Islands” Ag膜增强了固态蓝色碳点的发光能力，可用于高效发光二极管

当将CD致密地沉积在玻璃基板上时，碳点（CD）的光致发光被明显淬灭，这限制了它们的应用。在这项工作中，通过与“ Island” Ag膜偶联，探索了聚乙烯吡咯烷酮（PVP）聚合物对蓝色CD的发光增强作用。CD的荧光强度提高了近5倍。此外，探索了Ag / CDs / PVP在LED中的应用，发光效率高达39.2 lm W -1。连续运行10小时后，蓝色LED的发光强度仍可保持在95％以上，这表明该蓝色LED的稳定性非常好。