Conventional white lightings based on light-emitting diodes (LEDs) lack deep red, which is responsible for their low color rendering index (CRI). To apply red quantum-dot (QD) caps is one way to improve the color-rendering property of white LEDs. Red QD caps were fabricated using CdSe/ZnS QDs in the acrylic resin matrix and applied to conventional white LED lighting, which clearly showed a significant increase in the CRI, especially R9 associated with the strong red. Optical simulation was carried out to find out the optimized structure of the QD caps. The CRI increased while the optical efficiency decreased as the color conversion efficiency increased, which suggested that there should be a compromise between the two properties. It was found that to form a non-absorbing optical cavity in the QD cap was an effective way to achieve high CRI values while maintaining a moderately good optical efficiency.

基于发光二极管（LED）的常规白色照明缺乏深红色，这是其低显色指数（CRI）的原因。应用红色量子点（QD）盖帽是一种改善白色LED的显色性的方法。红色QD灯头是在丙烯酸树脂基质中使用CdSe / ZnS QD制成的，并应用于常规的白色LED照明，这显然显示出CRI的显着提高，尤其是与强红色相关的R9。进行光学仿真以找出QD瓶盖的优化结构。随着颜色转换效率的增加，CRI增加而光学效率降低，这表明这两种性能之间应该折衷。