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In this paper, Er3+/Eu3+ co-doped BiOCl phosphors are synthesized by the conventional solid state method at 500℃, which are characterized by XRD, SEM, absorption spectra, excitation spectra and emission spectra. XRD analysis indicates that the samples exhibit pure tetragonal phase BiOCl. In SEM pictures, the samples exhibit smooth plate-like particles. The absorption spectra indicate that Er3+/Eu3+ ion dopants result in an impurity energy level, and the excitation spectra show that the sample has excellent broadband near ultraviolet (NUV)-exciting ability, which is due to the electronic transitions of the BiOCl bandgap. Under at 380 nm excitation, the emission bands located at 410 nm (2H9/2→4I15/2), 525 nm (2H11/2→4I15/2), 554 nm (4S3/2→4I15/2), 673 nm (4F9/2→4I15/2) of Er3+ ions, and 581 nm (5D0→7F0), 594 nm (5D0→7F1), 622 nm (5D0→7F2), 653 nm (5D0→7F3), 699 nm (5D0→7F4) of Eu3+ ions can be observed, respectively. Moreover, contrary to most of the Er3+/Eu3+-activated phosphors, the Er3+/Eu3+ co-doped BiOCl phosphor shows the unique and effective emission of the violet (Er3+) and far-red (Eu3+), which results from the particular structure of BiOCl crystals. The tunability in color of emitted radiation has been visualized by using chromaticity diagram on changing the doping concentration. Results show that the Er3+/Eu3+ co-doped BiOCl is a promising phosphor for near UV white LEDs.
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Keywords:
- Er3+/Eu3+ co-doped BiOCl /
- near UV excited /
- color tunability
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[18] Li Y J, Zhao Z Y, Song Z G, Wan R H, Qiu J B, Yang Z W, Yin Z Y, Liu X E, Liu Q, Zhou Y T 2015 J. Am. Ceram. Soc. 98 2170
[19] Peng S J, Li L L, Zhu P N, Wu Y Z, Srinivasan M, Mhaisalkar S G, Ramakrishna S, Yan Q Y 2013 Chem. Asian J. 8 258
[20] Zhao Z Y, Dai W W 2014 Inorg. Chem. 53 13001
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[1] Wang Y H, Zhu G, Xin S Y, Wang Q, Li Y Y, Wu Q S, Wang C, Wang X C, Ding X, Geng W Y 2015 J. Rare Earths 33 1
[2] Bandi V R, Grandhe B K, Woo H, Jang K, Shin D, Yi S, Jeong J 2012 J. Alloys Compd. 538 85
[3] Sun X Y, Zhang J H, Zhang X, Lu S Z, Wang X J 2007 J. Lumin. 122 955
[4] Liu H L, Hao Y Y, Xu B S 2013 Acta Phys. Sin. 62 108504 (in Chinese) [刘红利, 郝玉英, 许并社 2013 62 108504]
[5] Cui H, Zhu P F, Zhu H Y, Li H D, Cui Q L 2014 Chin. Phys. B 23 057801
[6] Ye S, Xiao F, Pan Y X, Ma Y Y, Zhang Q Y 2010 Materials Science and Engineering R: Reports 71 1
[7] Dai Q L, Foley M E, Breshike C J, Lita A, Strouse G F 2011 J. Am. Chem. Soc. 133 15475
[8] Liang Z Q, Zhao S L, Cui Y, Tian L J, Zhang J J, Xu Z 2015 Chin. Phys. B 24 037801
[9] Ma C S, Jiao Q, Li L J, Zhou D C, Yang Z W, Song Z G, Qiu J B 2014 Chin. Phys. B 23 057802
[10] Zhang X, Ai Z H, Jia F L, Zhang L Z 2008 J. Phys. Chem. C 112 747
[11] Ye L Q, Deng K J, Xu F, Tian L H, Peng T Y, Zan L 2012 Phys. Chem. Chem. Phys. 14 82
[12] Dash A, Sarkar S, Adusumalli V N, Mahalingam V 2014 Langmuir 30 1401
[13] Li G Q, Zhang X C, Ding G Y, Fan C M, Liang Z H, Han P D 2013 Acta Phys. Sin. 62 127301 (in Chinese) [李国旗, 张小超, 丁光月, 樊彩梅, 梁镇海, 韩培德 2013 62 127301]
[14] Saraf R, Shivakumara C, Behera S, Dhananjaya N, Nagabhushana H 2015 RSC Adv. 5 9241
[15] Li Y J, Song Z G, Li C, Wan R H, Qiu J B, Yang Z W, Yin Z Y, Yang Y, Wang X, Wang Q 2013 Ceram. Int. 39 8911
[16] Li Y J, Song Z G, Li C, Wan R H, Qiu J B, Yang Z W, Yin Z Y, Yang Y, Zhou D C, Wang Q 2013 Appl. Phys. Lett. 103 231104
[17] Kuang Q L, Li Y J, Qiu J B, Yin Z Y, Yang Z W, Song Z G, Wan R H, Liu Q, Zhou Y T 2015 Spectroscopy and Spectral Analysis 35 889 (in Chinese) [邝庆亮, 李永进, 邱建备, 尹兆益, 杨正文, 宋志国, 万荣华, 刘群, 周玉婷 2015 光谱学与光谱分析 35 889]
[18] Li Y J, Zhao Z Y, Song Z G, Wan R H, Qiu J B, Yang Z W, Yin Z Y, Liu X E, Liu Q, Zhou Y T 2015 J. Am. Ceram. Soc. 98 2170
[19] Peng S J, Li L L, Zhu P N, Wu Y Z, Srinivasan M, Mhaisalkar S G, Ramakrishna S, Yan Q Y 2013 Chem. Asian J. 8 258
[20] Zhao Z Y, Dai W W 2014 Inorg. Chem. 53 13001
[21] Yi J, Zhao Z Y 2014 J. Lumin. 156 205
[22] Ferreira R S, Nobre S S, Granadeiro C M, Nogueira H, Carlos L D, Malta O L 2006 J. Lumin. 121 561
[23] Ozawa T C, Fukuda K, Akatsuka K, Ebina Y, Sasaki T, Kurashima K, Kosuda K 2008 J. Phys. Chem. C 112 17115
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