Enhancement of light extraction efficiency with different molar amount of europium in TiO2 :Eu3+ for WLEDs

被引：3

作者：

Mun, Ju Young ^{[1
]}

Park, Jin Young ^{[1
]}

Park, Sung Jun ^{[1
]}

Yang, Hyun Kyoung ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept LED Convergence Engn, Busan 48547, South Korea

来源：

OPTIK | 2017年 / 136卷

基金：

新加坡国家研究基金会;

关键词：

TiO2:Eu3+; Light extraction efficiency; Solvothermal; LUMINESCENCE PROPERTIES; SPECTROSCOPY;

D O I：

10.1016/j.ijleo.2017.02.031

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To evaluate of light extraction efficiency and structural properties, Eu3+ doped TiO2 sphere were prepared by means of solvothermal reaction method. The influence of Eu3+ concentration on the size and surface morphology of TiO2 spheres were examined by taking the scanning electron microscope and transmission electron microscope images. When the Eu3+ ion was introduced in anatase phase, the intense red emission of 612.5 nm was observed under the excitation at 392.5 nm. The emission intensity increased with increasing the concentration of Eu3+ ions. Moreover, the diffused reflectance spectra of Eu-3+ doped TiO2 spheres exhibited higher reflectivity by high concentration of Eu3* ions. When the blue LED chip is coated with a combination 10 mol% Eu3+ doped TiO2 spheres and commercial Y3Al5O12:Ce3+ phosphor, a pleasant WLED with a high intensity, a CRI of 62 and a CCT of 4938 k, which are enhanced light extraction efficiency, is achieved. (C) 2017 Elsevier GmbH. All rights reserved.

引用

页码：595 / 601

页数：7

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