Blue-laser-diode–based high CRI lighting and high-speed visible light communication using narrowband green-/red-emitting composite phosphor film

Abstract

We experimentally demonstrate high-speed visible light communication (VLC) and high-quality solid-state lighting (SSL) using polymethyl-methacrylate-doped phosphor film based on cesium lead bromide quantum dot ( CsPbB r 3 -QD) and potassium fluorosilicate K 2 Si F 6 : M n 4 + , which is excited by a blue gallium nitride laser diode. A 1.6 Gbps data rate is achieved by employing a non-return-to-zero on–off keying modulation scheme. The measured bit error rate of 2.7 × 10 − 3 adheres to the standard threshold ( 3.8 × 10 − 3 ) of forward error correction. Moreover, the generated white-light source has a high color rendering index of 93.8 and a correlated color temperature of 4435 K, and it exhibits a Commission Internationale de l’Eclairage (CIE) 1931 chromaticity coordinate at (0.3556, 0.3520), which is close to the ideal CIE value of white light (0.3333, 0.3333). This work opens up exciting possibilities for future high-speed indoor VLC and high-quality SSL.

Blue Laser Diode-Based Visible Light Communication and Solid-State Lighting

“…We demonstrated a color-rendering index (CRI) of 93.8, a correlated color temperature (CCT) of 4435 K, and a data rate of 1.6 Gbps under NRZ-OOK modulation by an exciting blue laser diode polymethyl methacrylate (PMMA) doped phosphor film based on cesium lead bromide quantum dot ( 3 CsPbBr -QD) and potassium fluorosilicate 4 26 : K SiF Mn + (KSF) [56]. Figure 14(a) shows the optical spectrum of generated white light in which blue, red, and green fluorescent components are observed.…”

Triple-layer Design of YVO4:Eu3+, YF3:Mn2+, and YAG:Ce3+: the Potential for Advancement of Remote Phosphor Structure to Get Better Chromaticity and Luminescence at High Color Temperatures

“…The color rendering of this structure showed improvement, but low light extraction efficiency [11]- [13]. The problem of these two phosphor structures is that the phosphor layer contacts directly with the LED chip, which caused the increase in the thermal generation at their interface, leading to the fast decay of phosphor materials and large amounts of backscattered lights [14]. As the significant backscattering was reported, a considerable proportion of light trapped and lost in the phosphor layer consequently occurred, leading to inferior luminescence.…”

The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode

“…White light emitting diodes (WLEDs), a means of illumination has gained their popularities in the past few years due to their outstanding advantages, for instance, consistency, duration, and environmentall friendly [1]- [3]. With such benefits, they are predicted to substitute conventional lighting means in the upcoming years.…”

“…An alternative method is to mix ultra-violet LED (in the range from 380 to 420 nm) and RGB together. As a result, developing novel phosphors, which are stimulated efficiently in the near ultra-violet region, is a critical possibility that deserves immediate attention [1], [7], [8]. When activated by Eu 2+ , due to various advantages, such as strong consistency physiccally as well as chemically and bad heat extinguishing, and nitride/oxynitride hosts that created strong luminescence, this substance becomes an ideal for primary materials.…”