Single-Phase Organic–Inorganic Hybrid Nanoparticles for Warm-White Lighting

White light-emitting diodes (W-LEDs) are an important solid-state lighting source, thanks to their superior properties. Here, a single-phase phosphor composed of organic–inorganic hybrid nanoparticles having a potential application in W-LEDs is successfully prepared. Green facile hydrothermal synthesis is used to obtain the phosphor integrated LaF3:Pr3+ with inexpensive sodium dodecyl benzene sulfonate (SDBS). It emits bright white light excited by ultraviolet (UV, λ = 365 nm) light. Moreover, its color coordinates and temperature are (0.365, 0.412) and 4606 K, respectively, according to the Commission Internationale de L’Eclairage (CIE). Meanwhile, phosphor shows good thermal stability and long photoluminescence decay time. Therefore, it would be a potential material for warm-white lighting.