Dy3+: B2O3-Al2O3-ZnF2-NaF/LiF oxyfluoride glasses for cool white or day white light-emitting applications

被引：21
作者：
Lakshminarayana, G. [1 ]
Vighnesh, K. R. [2 ]
Prabhu, Nimitha S. [2 ]
Lee, Dong-Eun [3 ]
Yoon, Jonghun [4 ]
Park, Taejoon [5 ]
Kamath, Sudha D. [2 ]
机构：
[1] Kyungpook Natl Univ, Intelligent Construct Automat Ctr, 80 Daehak Ro, Daegu 41566, South Korea
[2] Manipal Acad Higher Educ, Glass Proc Lab, Dept Phys, Manipal Inst Technol, Manipal 576104, India
[3] Kyungpook Natl Univ, Sch Architecture & Civil Engn, 80 Daehak Ro, Daegu 41566, South Korea
[4] Hanyang Univ, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea
[5] Hanyang Univ, Dept Robot Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea
来源：
OPTICAL MATERIALS | 2020年 / 108卷
基金：
新加坡国家研究基金会;
关键词：
Dy3+: B2O3-Al2O3-ZnF2-NaF-LiF glass; Mixed alkali effect; Luminescence; Correlated color temperature; Color purity; WLEDs; PHOSPHOR-IN-GLASS; LUMINESCENCE PROPERTIES; BAND-GAP; ALKALI; LEDS; PHOTOLUMINESCENCE; ABSORPTION; IONS;
D O I：
10.1016/j.optmat.2020.110186
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structural, thermal and optical characteristics of 0.5 mol% Dy3+-doped oxyfluoride zinc alumino borate glasses were studied by XRD, FTIR, DSC, optical absorption, and luminescence approaches. All FTIR spectra indicate the presence of functional groups like BO4 and BO3 units, and AlO6 groups. Dy3+ shows emission bands at 483 nm (F-4(9/2) -> H-6(15/2) transition, blue), 575 nm (F-4(9/2) -> H-6(13/2) transition, yellow), and 663 nm (F-4(9/2) -> H-6(11/2) transition, weak red), respectively, under 350 nm excitation. Among all samples, 54.5B(2)O(3)-5Al(2)O(3)-10ZnF(2)-30NaF-0.5Dy(2)O(3) glass exhibits the highest intensity for all observed emission bands. The emission spectral data were used to compute yellow/blue (Y=B) ratios, color chromaticity coordinates (x, y), correlated color temperatures (CCT), D-uv, and color purity (CP) of the samples. The deduced color coordinates (0.345, 0.350), 5003 K CCT at-0.001 D-uv with 9% color purity for 54.5B(2)O(3)-5Al(2)O(3)-10ZnF(2)-30NaF-0.5Dy(2)O(3) sample hints it as a potential candidate for WLEDs application.
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页数：9
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