Smart quantum dot LEDs with simulated solar spectrum for intelligent lighting

Abstract

LED light bulbs that simulate solar spectrum were fabricated using CdSe core–shell quantum dots in combination with GaN blue-light chips. They exhibited excellent optical properties such as white CIE coordinates of (0.33, 0.33), high color rendering index (CRI) of 98 and correlated color temperature (CCT) of 5352 K. Moreover, a circuit system was used to control the LEDs so that the lighting spectrum changes with the time in a day to simulate the actual solar spectrum. The results show that the sun-like spectrum smart bulbs not only have good optical properties and high electrical stability, but also can automatically adjust their spectrum according to the time, making the lighting natural. This work makes sun-like lighting conditions for some special environments to promote the application of smart bulbs in smart lighting.

CRI-Based Smart Lighting System That Provides Characteristics of Natural Light

“…Oh et al applied four LED light sources with assorted color characteristics to produce LED lighting that satisfies a CRI above 90 [17]. Zhao et al introduced a technology that helped achieve a color rendering index higher than 98 under specific color temperature conditions through Smart quantum dot LED [18]. In addition, lighting companies have released LED light sources with a CRI higher than 95 to realize a spectrum like natural light [19].…”