دانلود High Eflciency and Color Rendering Quantum Dots White Light Emitting Diodes Optimized by Luminescent Microspheres Incorporating

ترجمه فارسی High Eflciency and Color Rendering Quantum Dots White Light Emitting Diodes Optimized by Luminescent Microspheres Incorporating
قیمت : 255,000 ریال
شناسه محصول : 2008891
نویسنده/ناشر/نام مجله : Nanophotonics
سال انتشار: 2016
تعداد صفحات انگليسي : 8
نوع فایل های ضمیمه : Pdf+Word
حجم فایل : 2 Mb
کلمه عبور همه فایلها : www.daneshgahi.com
عنوان انگليسي : High Eflciency and Color Rendering Quantum Dots White Light Emitting Diodes Optimized by Luminescent Microspheres Incorporating

چکیده

Abstract

In this research, we have developed an approach by incorporating quantum dots (QDs) with red emission into mesoporous silica microspheres through a non-chemical process and obtained luminescent micro spheres (LMS). Owing to the lattice structure of LMS, QDs were effectively protected from intrinsic aggregation in matrix and surface deterioration by encapsulant, oxygen and moisture. The LMS composite has therefore maintained large extent luminescent properties of QDs, especially for the high quantum efficiency. Moreover, the fabricated white light emitting diode (WLED) utilizing LMS and YAG:Ce yellow phosphor has demonstrated excellent light performance with color coordinates around (x =0.33, y =0.33), correlated color temperature between 5100 and 5500 K and color rendering index of Ra =90, R9 =95. The luminous efficiency of the WLED has reached up to a new record of 142.5 lm/W at 20 mA. LMS provide a promising way to practically apply QDs in lightings and displays with high efficiency as well as high stability.

Keywords: light emitting diodes quantum dots lumines- cent microspheres color rendering index
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