Cathodoluminescence and its temperature dependence in Tm‐doped Al
 
 x
 
 Ga
 
 1–
 x
 
 N thin films

We report on the growth and optical properties of Tm-doped AlGaN layers by organometallic vapor phase epitaxy (OMVPE). The morphological and optical properties of Tm-doped GaN (GaN:Tm) and Tm-doped AlGaN (AlGaN:Tm) were investigated by Nomarski differential interference contrast microscopy and photoluminescence (PL) characterization. Nomarski images reveal an increase of surface roughness upon doping Tm into both GaN and AlGaN layers. The PL characterization of GaN:Tm shows emission in the near-infrared range originating from intra-4f shell transitions of Tm3+ ions. In contrast, AlGaN:Tm also exhibits blue light emission from Tm3+ ions. In that case, the wider band gap of the AlGaN host allows energy transfer to higher states of the Tm3+ ions. With time-resolved PL measurements, we could distinguish three types of luminescent sites of Tm3+ in the AlGaN:Tm layer, having different decay times. Our results confirm that Tm ions can be doped into GaN and AlGaN by OMVPE, and show potential for the fabrication of novel high-color-purity blue light emitting diodes.

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Growth and optical characteristics of Tm-doped AlGaN layer grown by organometallic vapor phase epitaxy

Takatsu

Fuji

Tatebayashi

et al. 2018

Journal of Applied Physics

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Cathodoluminescence and its temperature dependence in Tm‐doped Al _x Ga _{1–
x} N thin films

Cited by 1 publication

References 14 publications

Growth and optical characteristics of Tm-doped AlGaN layer grown by organometallic vapor phase epitaxy

Growth and optical characteristics of Tm-doped AlGaN layer grown by organometallic vapor phase epitaxy

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Cathodoluminescence and its temperature dependence in Tm‐doped Al x Ga 1– x N thin films

Cited by 1 publication

References 14 publications

Growth and optical characteristics of Tm-doped AlGaN layer grown by organometallic vapor phase epitaxy

Growth and optical characteristics of Tm-doped AlGaN layer grown by organometallic vapor phase epitaxy

Contact Info

Product

Resources

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Cathodoluminescence and its temperature dependence in Tm‐doped Al _x Ga _{1–
x} N thin films