首页> 外文期刊>Optics Letters >Carrier-mediated 1.55 (mu)m photoluminescence from single Er~(3+) center in SnO_(2) nanocrystals
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Carrier-mediated 1.55 (mu)m photoluminescence from single Er~(3+) center in SnO_(2) nanocrystals

机译:SnO_(2)纳米晶体中单个Er〜(3+)中心的载流子介导的1.55μm光致发光

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摘要

We report the successful incorporation of Er~(3+) ions into SnO_(2) nanocrystals via a solvothermal method, with a resulting Er~(3+) concentration of the order of 10~(19) cm~(-3). Upon excitation above the SnO_(2) bandgap at 300 nm, intense and well-resolved Er~(3+)-related photoluminescence (PL) at 1.55 (mu)m was observed at room temperature. The results of PL excitation and ultraviolet/visible diffuse reflectance spectra indicate that the excitation is a carrier-mediated process with an energy transfer from the SnO_(2) host to Er~(3+). For the above-gap excitation, only a single type of Er~(3+) luminescence center located at a centrosymmetric site was identified. The near-infrared luminescence dynamics and the weak PL thermal quenching of Er~(3+) were also revealed.
机译:我们报道了通过溶剂热法成功地将Er〜(3+)离子掺入SnO_(2)纳米晶体中,导致Er〜(3+)浓度约为10〜(19)cm〜(-3)。在300nm处在SnO_(2)带隙以上激发后,在室温下观察到1.55μm的强烈且良好分辨的Er〜(3+)相关的​​光致发光(PL)。 PL激发和紫外/可见漫反射光谱的结果表明,该激发是载流子介导的过程,其能量从SnO_(2)主体转移到Er〜(3+)。对于上述间隙激发,仅鉴定出位于中心对称位点的单一类型的Er〜(3+)发光中心。还揭示了Er〜(3+)的近红外发光动力学和弱PL热猝灭。

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