کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5211426 | 1382949 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Yellow light-emitting polymer bearing fluorescein dye units: Photophysical property and application as luminescence converter of a hybrid LED
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Yellow-light emitting polymer particles (spherical shape â¼500-700 nm) were prepared from a solution of polyester bearing fluorescein dye units in tetrahydrofuran, via simple evaporation of the solvent. The morphology of the polymer particles was dependent on the concentration of a base such as triethylamine (TEA), probably due to a change in the balance between interactions among the polymer chains and interactions of the polymer chain with TEA molecules. Thus when a polymer solution containing an appropriate amount of TEA (pH 7.76) was evaporated, the resulting polymer particles became more distinct in the shape and larger in size (â¼1-2 μm). A hybrid light-emitting diode (LED) was fabricated, employing the polymer and a blue LED (460 nm) as a luminescence converter and a primary light source, respectively. When the polymer content was 10 wt.% in epoxy, a white emission was observed (1.81 lm at 20 mA).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 67, Issue 4, April 2007, Pages 341-347
Journal: Reactive and Functional Polymers - Volume 67, Issue 4, April 2007, Pages 341-347
نویسندگان
Periyayya Uthirakumar, Chang-Hee Hong, Eun-Kyung Suh, Youn-Sik Lee,