Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs
Spectral modulation of BCNO phosphors by Al3+ and Ti4+ doping for white LEDs
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用于白光 LED 的 Al3 和 Ti4 掺杂对 BCNO 荧光粉的光谱调制
DOI：
10.1016/j.jlumin.2016.04.005
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发表时间：
2016-08
影响因子：
3.6
通讯作者：
Tang Chengchun
中科院分区：
文献类型：
--
作者：
Zhang Xinghua;Yu Jingjing;Lu Zunming;Liu Hui;Jia Xiaobo;Ren Chunrong;Yang Xiaojing;Meng Fanbin;Tang Chengchun
合成了Al~（3+）和Ti~（4+）掺杂的BCNO荧光粉，并对其光谱性质进行了系统的研究。Al~（3+）掺杂的BCNO荧光粉主要由非晶态Al_2O_3和BCNO相组成。Al~（3+）掺杂提高了BCNO荧光粉的结晶度和B-N键的强度，使量子产率从5.6%提高到63.4%。另外，Ti4+掺杂的BCNO荧光粉由金红石型和金红石型的TiO2和BCNO纳米晶组成。随着Ti4+掺杂量的增加，发射光谱从510 nm红移到555 nm，在400 - 500 nm的宽范围内成功地提高了激发强度，有利于蓝光激发。光谱性质和电子跃迁过程都可以用一个简化的能带图来解释。Al3+和Ti4+掺杂的BCNO荧光粉可以作为紫外和蓝光激发的白色LED的良好候选材料。
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 Al2O3and 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 TiO2with anatase and rutile structures and BCNO nanocrystals. The emission spectra are red shifted from 510 nm to 555 nm with the increase of Ti4+doping, and the excitation intensity is successfully improved by Ti4+doping in a wide range of 400−500 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.
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