The use of orange-red emitting Ba2Ca(BO3)2:Sm3+ phosphor to improve chromaticity and luminance of conventional white leds

Abstract

The characteristics of configuration and illumination of Sm³⁺ incorporated Ba₂Ca(BO₃)₂ samples produced using the traditional solid-status approach are discussed in this study. The luminescence measurement of the prepared red phosphor and phosphor-conversion sheet for white light emitting diodes (WLED) were conducted with Mie-scattering Monte Carlo simulation and MATLAB computation. The phosphor demonstrated a broad emission range with the prominent emission peak at ~601 nm under the 402 nm radiation, originated from the Sm³⁺ ion’s ⁴G_5/2 and ⁶H_7/2 transfer. The use of Ba₂Ca(BO₃)₂:Sm³⁺ (abbreviation is BC(BO):Sm) in combination with CaCO₃ nanoparticles and yellow phosphor to form a conversion layer demonstrates the increase in red spectrum band of the generated white light. By varying the concentration of CaCO₃ amount and maintain the BC(BO):Sm concentration constant, the improvement in specific properties of WLED can be accomplished. According to the findings, the phosphor Ba₂Ca(BO₃)₂:Sm³⁺ can be utilized with a near ultraviolet (n-UV) or blue chip for producing quality-enhanced WLEDs.