کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7934612 | 1512939 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and luminescence properties of Mn4+-dopant Ca14Zn6Ga10âxAlxO35 solid solution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and luminescence properties of Mn4+-dopant Ca14Zn6Ga10âxAlxO35 solid solution Synthesis and luminescence properties of Mn4+-dopant Ca14Zn6Ga10âxAlxO35 solid solution](/preview/png/7934612.png)
چکیده انگلیسی
Mn4+-activated oxide phosphors, owing to their desirable spectral features, eco-friendly and low cost, are emerging as a new class of non-rare-earth red phosphors for warm white LEDs. However, these phosphors possess low photoluminescence quantum efficiency excited by blue chip currently. Herein we report an isostructural solid solution of Ca14Zn6Ga10âxAlxO35: 0.15Mn4+ (0 ⤠x ⤠10) synthesized by a traditional solid-state reaction route. The microstructure and luminescent performance of this red-emitting phosphor are investigated in detail with the aids of X-ray diffraction, diffuse reflection spectra, photoluminescence spectra/decay/QE, and temperature-dependent PL/QE measurements. Blue shift of energy peaks of 4A2 â 4T1 and 4A2 â 4T2 transition is illustrated by the Tanabe-Sugano diagram and the configurational coordinate diagram. The crystal field strength (Dq) and the Racah parameters (B and C) are carefully calculated to estimate the nephelauxetic effect β respectively. Particularly we achieve external and internal quantum efficiencies as high as 26.1% and 40.3% for Ca14Zn6Ga6Al4O35: 0.15Mn4+ excited by 466â¯nm, the highest one ever reported in Mn4+ activated oxide phosphors under the similar condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 3, June 2018, Pages 301-307
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 3, June 2018, Pages 301-307
نویسندگان
Yiyang Zhou, Weiren Zhao, Chongrui Lu, Zifeng Liao,