Judd-Ofelt itemization and influence of energy transfer on Sm3+ ions activated B2O3-ZnF2-SrO-SiO2 glasses for orange-red emitting devices

被引:48
作者
Ravina [1 ]
Naveen [1 ]
Sheetal [1 ]
Kumar, V [2 ]
Dahiya, S. [3 ]
Deopa, Nisha [1 ]
Punia, R. [1 ]
Rao, A. S. [4 ]
机构
[1] Chaudhary Ranbir Singh Univ, Dept Phys, Rohtak Bypass Rd, Jind 126102, Haryana, India
[2] Graph Era Deemed Univ, Dept Elect & Commun Engn, Dehra Dun 248002, Uttarakhand, India
[3] Maharshi Dayanand Univ, Dept Phys, Rohtak 124001, Haryana, India
[4] Delhi Technol Univ, Dept Appl Phys, Bawana Rd, New Delhi 110042, India
关键词
Glasses; Inokuti-hirayama model; Energy transfer; Photoluminescence; Judd-ofelt; Theory; Dexter theory; ALUMINO BORATE GLASSES; TUNGSTEN TELLURITE GLASSES; OPTICAL-PROPERTIES; DY3+ IONS; SPECTROSCOPIC INVESTIGATIONS; FLUORESCENCE PROPERTIES; BOROSILICATE GLASSES; W-LEDS; PHOTOLUMINESCENCE; ABSORPTION;
D O I
10.1016/j.jlumin.2020.117651
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Augmenting the photoluminescence (PL) properties of Samarium (Sm3+) doped Zinc Strontium fluoro-borosilicate glass (ZSFBSi glass) by varying the Sm3+ ions concentration unlocks new prospects for their application as luminescent devices. This paper presents absorption, photoluminescence (PL), energy transfer and color chromaticity parameterization of ZSFBSi glass doped with Sm3+ ions concentrations. The Judd-Ofelt (J-O) theory in correlation with absorption as well as PL spectra leads to the estimation of radiative parameters of the excited luminescent states of Sm3+ ions needed to understand the luminescent potentiality of the as-prepared glasses. The absorption spectral data reveals the nature of bonding between Sm3+ ions and oxygen ligands in the as-quenched glasses as ionic and the result is consistent with the J-O analysis. The PL spectra of as-quenched glasses exhibit greenish-yellow, orange-red, light red and red color ascribed to (4)G(5/2) -> H-6(5/2), H-6(7/2), H-6(9/2), H-6(11/2) emission bands at 563, 599, 646 and 706 nm, respectively. The PL intensity enhances with an escalation in Sm3+ ions content until 1.0 mol% and reduces thereafter, owing to a proficient energy transfer (ET) process. The Dexter theory and Inokuti-Hirayama (I-H) model identified the foremost ET process associated with the as quenched glasses as dipole-dipole in nature. The CIE color coordinates (x, y) and Correlated Color Temperature (CCT) were calculated to cognize the effectiveness of as-quenched glasses in radiative cool white emission. The estimated branching ratios, emission cross-sections, gain bandwidth, quantum efficiency, optical gain, color coordinates and CCT finally reveals that the as-quenched glasses can be used in luminescent devices and amide all, 1.0 mol% Sm2O3 in ZSFBSi glass is highly appropriate for white LEDs as well as orange-red luminescent devices.
引用
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页数:13
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