کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398267 | 1505885 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
BCNO phosphors with Al3+ and Ti4+ doping were synthesized and their spectral properties were systematically investigated. The BCNO phosphors with Al3+ doping are mainly composed of amorphous Al2O3 and BCNO nanocrystal. The crystallinity of BCNO phosphors and intensity of B-N related chemical bonds are improved with Al3+ doping which leads to the enhancement of quantum yields from 5.6% to 63.4%. In addition, The BCNO phosphors with Ti4+ doping are consisted of TiO2 with anatase and rutile structures and BCNO nanocrystals. The emission spectra are red shifted from 510Â nm to 555Â nm with the increase of Ti4+ doping, and the excitation intensity is successfully improved by Ti4+ doping in a wide range of 400â500Â nm, which is favorable for blue light excitation. Both the spectral properties and electron transition process can be explained by a simplified energy band diagram. The BCNO phosphors with Al3+ and Ti4+ doping can be good candidates for white LED with ultraviolet and blue light excitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 176, August 2016, Pages 283-291
Journal: Journal of Luminescence - Volume 176, August 2016, Pages 283-291
نویسندگان
Xinghua Zhang, Jingjing Yu, Zunming Lu, Hui Liu, Xiaobo Jia, Chunrong Ren, Xiaojing Yang, Fanbin Meng, Chengchun Tang,