油胺
纳米晶
化学
光致发光
发光
硫化物
纳米结构
稀土
胶体
量子点
纳米技术
材料科学
光化学
吸收(声学)
化学工程
光电子学
矿物学
物理化学
有机化学
工程类
复合材料
作者
Guillaume Gouget,Morgane Pellerin,Rabih Al Rahal Al Orabi,Lauriane Pautrot‐d'Alençon,Thierry Le Mercier,Christopher B. Murray
摘要
We report the synthesis of colloidal EuS, La2S3, and LaS2 nanocrystals between 150 and 255 °C using rare-earth iodides in oleylamine. The sulfur source dictates phase selection between La2S3 and LaS2, which are stabilized for the first time as colloidal nanocrystals. The indirect bandgap absorption of LaS2 shifts from 635 nm for nanoellipsoids to 365 nm for square-based nanoplates. Er3+ photoluminescence in La2S3:Er3+ (10%) is sensitized by the semiconducting host in the 390–450 nm range. The synthetic route yields tunable compositions of rare-earth sulfide nanocrystals. Interaction of light with these novel semiconducting nanostructures hosting rare-earth emitters should be attractive for applications that require broadband sensitization of RE emitters.
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