材料科学
原子层沉积
光子上转换
锐钛矿
薄膜
纳米颗粒
涂层
纳米技术
发光
兴奋剂
化学工程
光电子学
光催化
化学
工程类
催化作用
生物化学
作者
Fatma Trabelsi,Frédéric Mercier,Elisabeth Blanquet,Alexandre Crisci,R. Boichot,Danying Chen,Rached Salhi
标识
DOI:10.1016/j.jlumin.2022.119282
摘要
This paper investigates the upconversion luminescence modification of codoped nanoparticles with lanthanides ions based thin films through adding a coating. First, these nanoparticles based thin films composed of Er3+-Yb3+ co-doped anatase-TiO2 are prepared using spin coating technique supported by a design of experiment (DOE) approach with the Hadamard matrix of order 4 to improve the deposition conditions. For the coating step, different thicknesses of Al2O3 layer are realised by thermal atomic layer deposition (T-ALD) onto the surface of Er3+-Yb3+ co-doped anatase-TiO2 nanoparticles based thin films. The results show that the ALD-Al2O3 coating can benefit the luminescence properties of the upconversion nanoparticles based thin films. Thin ALD-Al2O3 (10 nm) coated stack exhibits similar upconversion luminescence as the uncoated nanoparticles based film but insures also their stability. Meanwhile, for 100 nm ALD-Al2O3 coating, enhancement of the upconversion green emission by 98% at the expense of the red emission compared to uncoated sample is observed. This results are promising to be applied in photovoltaics field.
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