Exploration of solid-state efficient red emissive carbon dots (CDs) phosphors is strongly desired for the development of high performance CDs-based white light-emitting diodes (WLEDs). In this work, enhanced red emissive CDs-based phosphors with photoluminescence quantum yields (PLQYs) of 25% were prepared by embedding red emissive CDs (PLQYs of 23%) into polyvinyl pyrrolidone (PVP). Because of the protection of PVP, the phosphors could preserve strong luminescence under long-term UV excitation or being mixed with conventional packaging materials. By applying the red emissive phosphors as the color conversion layer, WLEDs with high color rendering index of 92 and color coordinate of (0.33, 0.33) are fabricated.

迫切需要开发固态高效红色发射碳点（CD）荧光粉，以开发基于CD的高性能白光发光二极管（WLED）。在这项工作中，通过将红色发光CD（23％的PLQYs）嵌入聚乙烯吡咯烷酮（PVP）中，制备了光致发光量子产率（PLQYs）为25％的增强型红色发光CDs荧光粉。由于PVP的保护，磷光体可以在长期的紫外线激发下或与常规包装材料混合后保持强发光。通过将红色发光磷光体用作颜色转换层，可以制造具有92的高显色指数和（0.33，0.33）的色坐标的WLED。