Blue and red light photoluminescence emission at room temperature from CaTiO3 decorated with α-Ag2WO4

被引：18

作者：

Mondego, Mayara ^{[1
]}

de Oliveira, Regiane C. ^{[1
]}

Penha, Maya ^{[1
]}

Li, Maximo Siu ^{[2
,3
]}

Longo, Elson ^{[1
,3
]}

机构：

[1] Univ Fed Sao Carlos, CDMF UFSCar, POB 676, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Sao Paulo, IFSC, POB 369, BR-13560970 Sao Carlos, SP, Brazil

[3] Univ Estadual Paulista, CDMF UNESP, POB 355, BR-14801907 Araraquara, SP, Brazil

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 07期

基金：

巴西圣保罗研究基金会;

关键词：

Optical properties; Decoration; Calcium titanate; Silver tungstate; RAMAN-SPECTROSCOPY; LUMINESCENCE PROPERTIES; ORDER-DISORDER; PEROVSKITE; TITANATE; DIFFRACTION; REFINEMENT; TUNGSTATE; BEHAVIOR; POWDER;

D O I：

10.1016/j.ceramint.2017.01.121

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

CaTiO3 (CT) and alpha-Ag2WO4 (AW) semiconductors are widely known for their interesting electrical and photoluminescence (PL) properties. In this study, we decorated CT with AW for obtaining CaTiO3:alpha-Ag2WO4 (CT:AW), and investigated the properties of the produced materials, especially their PL properties. The X-ray diffraction peaks of the synthesized microcrystals were well indexed to the orthorhombic phase for all the samples. Two morphologies: cube-like for CT and rod-like for AW were observed by field-emission scanning electron microscopy (FE-SEM). The FE-SEM and transmission electron microscopy (TEM) studies indicated the presence of rod-shaped AW deposited on the surfaces of cube-shaped CT morphology. PL emission of the decorated samples overlaps all the visible region spectra because of the contribution from both the constituent materials that induce maximum emissions in the blue and red regions. The examination of Commission Internationale de Mclairage (CIE) coordinates confirmed that the decorated samples exhibit favored emission the red wavelength region.

引用

页码：5759 / 5766

页数：8

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