TY - JOUR
T1 - A novel pure red phosphor Ca8MgLu(PO4)7:Eu3+ for near ultraviolet white light-emitting diodes
AU - Xie, Feiyan
AU - Dong, Zhiyue
AU - Wen, Dawei
AU - Yan, Jing
AU - Shi, Jianxin
AU - Shi, Jianying
AU - Wu, Mingmei
N1 - Funding Information:
This work was financially supported by Grants from the Joint Funds of the National Natural Science Foundation of China and Guangdong Province (No. U1301242 ), Research Fund for the Doctoral Program of Higher Education of China (RFDP) (No. 20130171130001 ), the Government of Guangdong Province for Industrial Applications of Rare Earth Photoluminescence Materials ( 2012B091000026 ), and the Natural Science Foundation of Huizhou university (No. hzuxl 201301 ).
Publisher Copyright:
© 2015 Elsevier Ltd and Techna Group S.r.l.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Abstract A novel red-emitting phosphor Ca8MgLu(PO4)7:Eu3+ was synthesized by a high-temperature solid-state reaction method. Its crystal structure, photoluminescence emission and excitation spectra, and decay time were investigated in detail. X-ray diffraction (XRD) results indicate that Ca8MgLu(PO4)7 crystallizes in single-phase component with a whitlockite-like structure and the space group R3c of β-Ca3(PO4)2. The emission spectrum shows a dominant peak at 612 nm due to the dipole 5D0→7F2 transition of Eu3+, and the luminescence intensity keeps increasing with increasing the content of Eu3+ to 100%. The excitation spectrum is coupled well with the emission of near ultraviolet (NUV) LED (380-410 nm). The CIE coordinates of Ca8MgLu(PO4)7:Eu3+ phosphor is (0.654, 0.346), being close to the standard value of National Television Standard Committee (NTSC) for red phosphor, (0.670, 0.330). The internal quantum efficiency of the phosphor is 69% under the excitation of 394 nm. The results show that Ca8MgLu(PO4)7:Eu3+ is a very appropriate red-emitting phosphor with a high ratio of red and orange for NUV-based white LEDs.
AB - Abstract A novel red-emitting phosphor Ca8MgLu(PO4)7:Eu3+ was synthesized by a high-temperature solid-state reaction method. Its crystal structure, photoluminescence emission and excitation spectra, and decay time were investigated in detail. X-ray diffraction (XRD) results indicate that Ca8MgLu(PO4)7 crystallizes in single-phase component with a whitlockite-like structure and the space group R3c of β-Ca3(PO4)2. The emission spectrum shows a dominant peak at 612 nm due to the dipole 5D0→7F2 transition of Eu3+, and the luminescence intensity keeps increasing with increasing the content of Eu3+ to 100%. The excitation spectrum is coupled well with the emission of near ultraviolet (NUV) LED (380-410 nm). The CIE coordinates of Ca8MgLu(PO4)7:Eu3+ phosphor is (0.654, 0.346), being close to the standard value of National Television Standard Committee (NTSC) for red phosphor, (0.670, 0.330). The internal quantum efficiency of the phosphor is 69% under the excitation of 394 nm. The results show that Ca8MgLu(PO4)7:Eu3+ is a very appropriate red-emitting phosphor with a high ratio of red and orange for NUV-based white LEDs.
KW - CaMgLu(PO):Eu
KW - Luminescence
KW - Phosphors
UR - http://www.scopus.com/inward/record.url?scp=84930925838&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84930925838&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2015.04.023
DO - 10.1016/j.ceramint.2015.04.023
M3 - Article
AN - SCOPUS:84930925838
SN - 0272-8842
VL - 41
SP - 9610
EP - 9614
JO - Ceramics International
JF - Ceramics International
IS - 8
M1 - 10430
ER -