Luminescence in Ca10(PO4)6O:Eu2+,Nd3+

被引:6
作者
Tawalare, P. K. [1 ]
Bhatkar, V. B. [2 ]
Omanwar, S. K. [1 ]
Moharil, S. V. [3 ]
机构
[1] St Gadge Baba Amravati Univ, Dept Phys, Amravati 444602, India
[2] Shri Shivaji Sci Coll, Dept Phys, Amravati 444603, India
[3] Rashtrasant Tukadoji Maharaj Nagpur Univ, Dept Phys, Nagpur 440010, Maharashtra, India
关键词
Near-infrared; Photoluminescence; Neodymium; Eu2+-> Nd3+ energy transfer; Solar photovoltaics; ENERGY-TRANSFER; SOLAR-CELLS; DOWN-CONVERSION; SITE OCCUPANCY; PHOSPHOR; EU2+; HYDROXYAPATITE; CHLOROAPATITE; REFINEMENT; APATITES;
D O I
10.1016/j.optmat.2018.07.018
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Intense blue and near-infrared emissions were observed in Ca-10(PO4)(6)O:Eu2+ and Ca-10(PO4)(6)O:Eu2+,Nd3+ phosphors. The emissions can be excited by broad band in near ultraviolet region. Blue emission is characterized by CIE coordinates 0.1519, 0.0696 which can be useful as a blue component of LED lamp based on near ultraviolet chips. Near-infrared emission is obtained as a consequence of Eu2+-> Nd3+ energy transfer. The efficiency of Eu2+-> Nd3+ energy transfer is as high as 95%. Fast (10 ns) and slow (300 ns) components observed in decay curves could be identified with isolated Eu2+ and Eu2+ ions near Nd3+, respectively. NIR Emission intensity is limited by Nd3+-> Nd3+ energy transfer and the consequent concentration quenching. Critical distances for Eu2+-> Eu2+ and Nd3+-> Nd3+ energy transfers are 18.86 and 12.62 angstrom, respectively. Absorption of near ultraviolet radiations followed by conversion to blue/NIR indicates the potential applications in solid state lighting and solar photovoltaics.
引用
收藏
页码:324 / 329
页数:6
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