Confinement effect and low-defect density-induced long lifetime Er silicate nanowire embedded in silicon oxide film.
Confinement effect and low-defect density-induced long lifetime Er silicate nanowire embedded in silicon oxide film.
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DOI：
10.1364/oe.391094
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发表时间：
2020-04
期刊：
影响因子：
3.8
通讯作者：
Hao Shen;Yuhan Gao;Deren Yang;Dongsheng Li
中科院分区：
文献类型：
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作者：
Hao Shen;Yuhan Gao;Deren Yang;Dongsheng Li
在这项研究中，我们开发了一种减少Er-Er相互作用的策略，以追求更高Er浓度的Er化合物的长寿命和高效率发光。研究了硅酸铒纳米线在氧化硅薄膜中的光学性质随退火温度和气氛的变化规律。通过同时降低缺陷密度和Er-Er相互作用，获得了长寿命的α-Er2Si2O7：844微米S晶体。α-Er2Si2O7纳米线的低缺陷密度主要归因于以下几个方面：无羟基污染、表面有效钝化和氧空位饱和。Er-Er离子之间的相互作用受α-Er2Si2O7纳米线中声子态密度效应的影响。更重要的是，由于纳米限制效应，fi-α-Er2Si2O7纳米线的上转换发光也得到了有效的降低。
In this study, we have developed a reduced Er-Er interaction strategy for pursuing long lifetime and high efficiency luminescence in Er compounds with higher Er concentration. Annealing temperature and atmosphere dependence of the optical properties from Er silicate nanowires embedded in silicon oxide films have been investigated. The record long lifetime α-Er2Si2O7 of 844 µs is achieved through simultaneously reducing defect density and Er-Er interaction. The low-defect density in the α-Er2Si2O7 nanowires is mainly attributed to following aspects: no hydroxyl groups contamination, effective surface passivation and saturation of oxygen vacancies. The interaction of Er-Er ions is confined by the alteration of phonon density of states effects in the α-Er2Si2O7 nanowires. More significantly, the up-conversion emissions in the α-Er2Si2O7 nanowires also reduce effectively because of the nanoconfinement effect.