Enhancement of light extraction in Y3Al5O12:Tb3+ thin films through nanopatterning

被引：3

作者：

Nyalosaso, Jeff L. ^{[1
]}

Potdevin, Audrey ^{[1
]}

Reveret, Francois ^{[2
]}

Disseix, Pierre ^{[2
]}

Mahiou, Rachid ^{[1
]}

Chadeyron, Genevieve ^{[1
]}

机构：

[1] Univ Clermont Auvergne, CNRS, SIGMA Clermont, ICCF, F-63000 Clermont Ferrand, France

[2] Univ Clermont Auvergne, CNRS, SIGMA Clermont, Inst Pascal, F-63000 Clermont Ferrand, France

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 213卷 / 213期

关键词：

Sol-gel process; Langmuir-Blodgett; LEDs; Surface nanostructuring; Light extraction; EFFICIENCY; PHOSPHORS; TB3+; LUMINESCENCE; LITHOGRAPHY; EXCITATION; CRYSTALS; DESIGN; LEDS;

D O I：

10.1016/j.ces.2019.115416

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Light extraction is a key parameter to improve the performances of optical devices. Nanopatterned Y3Al5O12:Tb3+ luminescent coatings usable in such devices have been elaborated and have shown enhanced emission efficiency compared to their unpatterned counterparts. These nanostructured films were obtained by using the colloidal lithography combined with the Langmuir-Blodgett technique. It is the first time to our knowledge that this patterning technique is directly applied on YAG matrix. Resulting nanostructuring is a hexagonal network capable of modifying the light travelling path within the substrate. Conventional and angular-resolved photoluminescence were investigated on both unpatterned and patterned samples. Due to the nanostructuring, the extraction efficiency is improved by 26% and 131% depending on the crystallinity of the sample. Noticeably, nanostructuring is found to have an influence on the angular distribution of photoluminescence whose intensity has been evaluated to its maximum normal to the film surface. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：11

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