This study developed flexible light-emitting diodes
(LEDs) with warm white and neutral white light. A simple
ultraviolet flip-chip sticking process was adopted for the pumping
source and combined with polymer and quantum dot (QD) films
technology to yield white light. The polymer-blended flexible LEDs
exhibited higher luminous efficiency than the QD-blended flexible
LEDs. Moreover, the polymer-blended LEDs achieved excellent
color-rendering index (CRI) values (Ra = 96 and R9 = 96), with
high reliability, demonstrating high suitability for special
applications like accent, down, or retrofit lights in the future. In
places such as a museum, kitchen, or surgery room, its high R9 and
high CRI characteristics can provide high-quality services.