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

Abstract

Until now, because of the being a candidate for the red-emitting material the CaAl 12 O 19 :Mn 4+ phosphor (CAO:Mn) has been widely used especially in white light-emitting diodes (WLEDs). In this study, the emission-based luminescence properties of CaAl 12 O 19 :Mn 4+ red phosphor synthesized via sol-gel method was studied in the absence and presence of Er 3+ - and Tb 3+ -doped 13–93 bioactive glass powders in ethyl cellulose (EC) matrix in detail. Upon the addition of un-doped and Er 3+ - and Tb 3+ - 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. • The optical properties of the CaAl 12 O 19 :Mn 4+ (CAO:Mn) along with Er 3+ - and Tb 3+ - doped bioactive glass powders were evaluated. • The intensity CAO:Mn; has been enhanced along with 1% Er 3+ - and 5% Tb 3+ - doped bioactive glass powders up to 92% and 88%, respectively. • The improvement in the efficiency of the phosphor has been performed by a cost-effective way.