Improvement of optical properties of one-dimensional CaAl12O19:Mn4+ phosphor via Er3+- and Tb3+- doped bioactive glass powders

Until now, because of the being a candidate for the red-emitting material the CaAl12O19:Mn4+ phosphor (CAO: Mn) has been widely used especially in white light-emitting diodes (WLEDs). In this study, the emission-based luminescence properties of CaAl12O19:Mn4+ red phosphor synthesized via sol-gel method was studied in the absence and presence of Er3+- and Tb3+-doped 13-93 bioactive glass powders in ethyl cellulose (EC) matrix in detail. Upon the addition of un-doped and Er3+- and Tb3+- doped bioactive glass powders, the CAO:Mn phosphor resulted in 44%, 92% and 88% increase in the emission intensity, respectively. The luminescence and decay time characteristics of the synthesized phosphor were also investigated in terms of microsecond time scale. The proposed material may bring a new inside for the existing problems of the red phosphors regarding the brightness, colour correlation temperature and colour rendering index.

Automated summary

In this study, the red-emitting material CaAl12O19:Mn4+ phosphor (CAO: Mn) synthesized via sol-gel method was investigated in the presence of Er3+- and Tb3+-doped 13-93 bioactive glass powders. The addition of doped bioactive glass powders resulted in significant increases in emission intensity. The synthesized phosphor showed promising potential for addressing issues related to red phosphors in terms of brightness, color correlation temperature, and color rendering index.