کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7840149 | 1505865 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Correlation between emission properties, valence states of Ce and chemical compositions of alkaline earth borate glasses
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Correlation between emission properties, valence states of Ce and chemical compositions of alkaline earth borate glasses Correlation between emission properties, valence states of Ce and chemical compositions of alkaline earth borate glasses](/preview/png/7840149.png)
چکیده انگلیسی
Although there are many reports investigating emission properties of Ce3+ centers, there is little report on the quantitative Ce3+/(Ce3++Ce4+) ratio, which is one of the most fundamental factors for designing phosphors. In this report, we have investigated the correlation among the optical and emission properties of Ce-doped alkaline earth borate glasses with the Ce3+/(Ce3++Ce4+) ratio determined by X-ray absorption near-edge structure analyses. It is confirmed that the additional carbon increases the population of Ce3+, which is also suggested from the optical absorption edge, Eg opt, due to Ce and the quantum yield (QY). We have revealed that the Ce3+ concentration of the Sr-substituted glass is completely the same as that of the Ca-substituted one that exhibits the highest efficiency, even though the Ce3+ ratio is suggested to depend on the substitution spices from the Eg opt and QY. Therefore, we can conclude that not only the Ce3+ amount but also the local structures of Ce3+ affect the emission properties. In other words, the luminescent efficiency of the Ce3+ centers in amorphous materials strongly depends on the various local coordination states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 197, May 2018, Pages 98-103
Journal: Journal of Luminescence - Volume 197, May 2018, Pages 98-103
نویسندگان
Aya Torimoto, Hirokazu Masai, Go Okada, Noriaki Kawaguchi, Takayuki Yanagida, Takahiro Ohkubo,