دورية أكاديمية
Double-Color Emitting SrSi2O2N2:Eu2+,Yb2+ Oxynitridosilicate Phosphor for Warm White-Light Emitting Diode with Highly Stable Color Chromaticity
| العنوان: | Double-Color Emitting SrSi2O2N2:Eu2+,Yb2+ Oxynitridosilicate Phosphor for Warm White-Light Emitting Diode with Highly Stable Color Chromaticity |
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| المؤلفون: | Kirakosyan, A Kirakosyan, Artavazd, Mnoyan, A Mnoyan, Anush, Cheong, SH Cheong, Sang Hoon, Lee, GY Lee, Ga Yeon, Jeon, DY Jeon, DukYoung |
| بيانات النشر: | ELECTROCHEMICAL SOC INC |
| سنة النشر: | 2013 |
| المجموعة: | Korea Advanced Institute of Science and Technology: KOASAS - KAIST Open Access Self-Archiving System |
| الوصف: | A green to orange emitting nitridosilicate based phosphor was developed for white-LED application. Observed broad-band emission in green to orange range is originated from Eu2+ and Yb2+-trap site of double doped SrSi2O2N2:Eu2+,Yb2+ nitridosilicate phosphor. Energy transfer between activator ions was confirmed by measuring of decay time of the green-emission as energy donor. The effect of co-doping by different ratio of activator ions on the photoluminescence properties was studied. Emission of the obtained phosphor is function of activator ion contents, and by increasing the Yb2+ concentration, the red emission dominants over green emission. The obtained phosphor was combined with InGaN blue-LED chip (lambda = 450 nm) to create white-light. The color balance control was realized by two steps. At first green to orange ratio was optimized by adjusting concentration of Eu2+ and Yb2+ ions. At second step, by increasing amount of phosphor powder the CIE coordinates were shifted from [0.2805; 0.2014] to [0.4071; 03789]. At optimized condition generated white light has color rendering index about 89. The LED based on the developed single-phase double-color emitting nitridosilicate phosphor and blue-LED chip showed high color stability against wide range of forward-bias current (100 to 500 mA at 3 V). (C) 2012 The Electrochemical Society. All rights reserved. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1149/2.025301jss |
| الإتاحة: | https://doi.org/10.1149/2.025301jssTest http://hdl.handle.net/10203/174929Test |
| رقم الانضمام: | edsbas.B3B734DC |
| قاعدة البيانات: | BASE |
| DOI: | 10.1149/2.025301jss |
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