کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5463909 | 1517193 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis of highly graphitized nitrogen-doped carbon dots and carbon sheets with solid-state white-light emission
ترجمه فارسی عنوان
سنتز نازک از نقاط کربن نیتروژن و ورق کربن با گرافیتی بسیار گرافیتی با انتشار نور سفیدی حالت جامد
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
We report the hydrothermal synthesis of nitrogen-doped carbon dots (NCDs) and carbon sheets (NCSs) with glucose and ammonia as precursors. The formation and N-doping of NCSs were one-step obtained. NCSs are highly graphitized with six-fold symmetry single-crystal character. The optical properties of NCDs and their application as single-phase solid-state phosphors toward white light-emitting diodes (LEDs) were thoroughly investigated. NCDs solutions exhibit strong blue-green emission under ultraviolet (UV) light illumination and possess excitation-dependent photoluminescence (PL) behavior. Irradiated by UV LEDs, NCDs solutions show broad PL in visible spectral region. To resist self-quenching of NCDs powder resulting from aggregations, poly (vinyl alcohol) (PVA) was added into NCDs solution. Without adding any other phosphors, solid-state NCDs/PVA composite demonstrates direct white-light emission. Our research offers a valuable reference for growing highly graphitized NCSs by facile hydrothermal method and developing white UV-LEDs with environment-friendly and metal-free NCDs phosphors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 195, 15 May 2017, Pages 58-61
Journal: Materials Letters - Volume 195, 15 May 2017, Pages 58-61
نویسندگان
X.G. Zheng, H.L. Wang, G.Q. Ding, G.L. Cui, L. Chen, P.H Zhang, Q. Gong, S.M. Wang,