Abstract
We report on Y3Al5O12: Ce3+ ceramic phosphor plate (CPP) using nano phosphor for high power laser diode (LD) application for white light in automotive lighting. The prepared CPP shows improved luminous properties as a function of Ce3+ concentration. The luminous properties of the Y3Al5O12: Ce3+ CPP nano phosphor are improved when compared to the Y3Al5O12: Ce3+ CPP with bulk phosphor, and hence, the luminous emittance, luminous flux, and conversion efficiency are improved. The Y3Al5O12: Ce3+ CPP with an optimal Ce3+ content of 0.5 mol % shows 2733 lm/mm2 value under high power blue radiant flux density of 19.1 W/mm2. The results indicate that Y3Al5O12: Ce3+ CPP using nano phosphor can serve as a potential material for solid-state laser lighting in automotive applications.
Highlights
We report on Y3Al5O12: Ce3+ ceramic phosphor plate (CPP) using nano phosphor for high power laser diode (LD) application for white light in automotive lighting
Ceramic phosphor plate (CPP) is combined with a laser diode because it is very different from high power blue laser diodes, which provide both optical and thermal stability compared with the mixture of organic resin with phosphor
The ground state is split into a doublet of two excitation bands at 338 and 450 nm, which was attributed to electronic transition from 2F5/2 to the split excited 5d states band in the ground state of the Ce3+ ion[24]
Summary
We report on Y3Al5O12: Ce3+ ceramic phosphor plate (CPP) using nano phosphor for high power laser diode (LD) application for white light in automotive lighting. The results indicate that Y3Al5O12: Ce3+ CPP using nano phosphor can serve as a potential material for solid-state laser lighting in automotive applications. The output power and external quantum efficiency (EQE) of laser diodes increase linearly as a function of operating current, and the colour stability of the laser emission peak is maintained[9,10] These characteristics make Y3Al5O12: Ce3+ phosphor an attractive excitation source for new high-power LD in white light applications. To fabricate the CPP using bulk-type phosphor, solid state reaction method is required at high temperature[13].
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