Synthesis and photoluminescence properties of a red emitting phosphor NaSr_2(NbO_3)_5:RE~(3+)(RE=Sm,Pr) for white LEDs
|
摘要
Rare earth Sm3+,Pr3+doped NaSr2(NbO3)5 red phosphors were successfully synthesized.X-ray diffraction analysis indicated that all the samples were single phased.The luminescence property was investigated in detail by diffuse-reflectance spectra and photoluminescence spectra measurement.Both NaSr2(NbO3)5:Sm3+and NaSr2(NbO3)5:Pr3+phosphors showed strong absorption in near ultraviolet region,which was suitable for application in LEDs.When excited by UV light,they both emitted bright red emission with CIE chromaticity coordinates(0.603,0.397)and(0.669,0.330),respectively.The optimal doping concentration of Sm3+doped NaSr2(NbO3)5was measured to be 0.04 and that for Pr3+doped NaSr2(NbO3)5was 0.01.The integral emission intensity was also measured and compared with the commercial red phosphor Y2O3:Eu3+.The results indicated that NaSr2(NbO3)5:RE3+(RE=Sm,Pr)have potential to serve as a red phosphor for UV pumped white LEDs.
Rare earth Sm3+, Pr3+doped NaSr2(NbO3)5 red phosphors were successfully synthesized. X-ray diffraction analysis indicated that all the samples were single phased. The luminescence property was investigated in detail by diffuse-reflectance spectra and photoluminescence spectra measurement. Both NaSr2(NbO3)5 :Sm3+and NaSr2(NbO3)5 :Pr3+phosphors showed strong absorption in near ultraviolet region, which was suitable for application in LEDs. When excited by UV light, they both emitted bright red emission with CIE chromaticity coordinates(0.603, 0.397) and(0.669, 0.330), respectively. The optimal doping concentration of Sm3+doped NaSr2(NbO3)5 was measured to be 0.04 and that for Pr3+doped NaSr2(NbO3)5 was 0.01. The integral emission intensity was also measured and compared with the commercial red phosphor Y2 O3 :Eu3+. The results indicated that NaSr2(NbO3)5 :RE3+(RE=Sm, Pr) have potential to serve as a red phosphor for UV pumped white LEDs.
Rare earth Sm3+, Pr3+doped NaSr2(NbO3)5 red phosphors were successfully synthesized. X-ray diffraction analysis indicated that all the samples were single phased. The luminescence property was investigated in detail by diffuse-reflectance spectra and photoluminescence spectra measurement. Both NaSr2(NbO3)5 :Sm3+and NaSr2(NbO3)5 :Pr3+phosphors showed strong absorption in near ultraviolet region, which was suitable for application in LEDs. When excited by UV light, they both emitted bright red emission with CIE chromaticity coordinates(0.603, 0.397) and(0.669, 0.330), respectively. The optimal doping concentration of Sm3+doped NaSr2(NbO3)5 was measured to be 0.04 and that for Pr3+doped NaSr2(NbO3)5 was 0.01. The integral emission intensity was also measured and compared with the commercial red phosphor Y2 O3 :Eu3+. The results indicated that NaSr2(NbO3)5 :RE3+(RE=Sm, Pr) have potential to serve as a red phosphor for UV pumped white LEDs.
引文
[1]Nakamura S,Mukai T,SenohNakamura M.Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes.Appl.Phys.Lett.,1994,64:1687.
[2]Crawford M H.LEDs for solid-state lighting:performance challenges and recent advances.IEEE J.Sel.Top.Quantum Electron.,2009,15:1028.
[3]Lin H,Zhang R,Chen D Q,Yu Y L,Yang A P,Wang Y S.Tuning of multicolor emissions in glass ceramics containingγ-Ga2O3andβ-YF3nanocrystals.J.Mater.Chem.C,2013,1:1804.
[4]Tansu N,Zhao H,Liu G,Li X H,Zhang J,Tong H,Ee Y K.III-Nitride photonics.IEEE Photonics J.,2010,2:241.
[5]Chen D Q,Yu Y L,Huang P,Lin H,Shan Z F,Wang Y S.Color-tunable luminescence of Eu3+in LaF3embedded nanocomposite for light emitting diode.Acta Mater.,2010,58:3035.
[6]Lin H,Chen D Q,Yu Y L,Shan Z F,Huang P,Wang Y S,Yuan J L.Nd3+-sensitized upconversion white light emission of Tm3+/Ho3+bridged by Yb3+inβ-YF3nanocrystals embedded transparent glass ceramics.J.Appl.Phys.,2010,107:103511.
[7]Chen D Q,Yu Y L,Lin H,Huang P,Weng F Y,Shan Z F,Wang Y S.CeF3-based glass ceramic:a potential luminescent host for white-light-emitting diode.Opt.Lett.,2009,34:2882.
[8]Huang S,Wei X T,Chen Y H,Yin M.Luminescence properties of a single-host phosphor Ba1.8–w Srw Li0.4SiO4:Ce3+,Eu2+,Mn2+for WLED.J.Rare Earths,2013,31:227.
[9]Liu W R,Lin C C,Chiu Y C,Yeh Y T,Jang S M,Liu R S.ZnB2O4:Bi3+,Eu3+:a highly efficient,red-emitting phosphor.Opt.Express,2010,18:2946.
[10]Sun H Y,Zhang X Y,Bai Z H.Synthesis and characterization of nano-sized YAG:Ce,Sm spherical phosphors.J.Rare Earths,2013,31:231.
[11]Kang D,Yoo H S,Jung S H,Kim H,Jeon D Y.Synthesis and photoluminescence properties of a novel red-emitting Na2Y2Ti3O10:Eu3+,Sm3+phosphor for white-light-emitting diodes.J.Phys.Chem.C,2011,115:24334.
[12]Lanfredia S,Gênovaa D H M,Britob I A O,Limac A R F,Nobrea M A L.Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder.J.Solid State Chem.,2011,184:990.
[13]Almudena T P,Ricardo J,JoséM,González C,Ester G G.Structural effects behind the low temperature nonconventional relaxor behavior of the Sr2NaNb5O15bronze.Inorg.Chem.,2011,50:12091.
[14]Chen Y,Wang J,Liu C M,Kuang X J,Su Q.A host sensitized reddish-orange Gd2MoO6:Sm3+phosphor for light emitting diodes.Appl.Phys.Lett.,2011,98:081917.
[15]Liu T C,Cheng B M,Hu S F,Liu R S.Highly stable red oxynitrideβ-SiAlON:Pr3+phosphor for light-emitting diodes.Chem.Mater.,2011,23:3698.
[16]Li Y Q,Wang Y H,Xu X H,Gong Y,Wang N.Electronic structures and Pr3+photoluminescence characteristics in fresnoite,Sr-frenoite,and Ge-frenoite.J.Am.Ceram.Soc.,2011,94:496.
[2]Crawford M H.LEDs for solid-state lighting:performance challenges and recent advances.IEEE J.Sel.Top.Quantum Electron.,2009,15:1028.
[3]Lin H,Zhang R,Chen D Q,Yu Y L,Yang A P,Wang Y S.Tuning of multicolor emissions in glass ceramics containingγ-Ga2O3andβ-YF3nanocrystals.J.Mater.Chem.C,2013,1:1804.
[4]Tansu N,Zhao H,Liu G,Li X H,Zhang J,Tong H,Ee Y K.III-Nitride photonics.IEEE Photonics J.,2010,2:241.
[5]Chen D Q,Yu Y L,Huang P,Lin H,Shan Z F,Wang Y S.Color-tunable luminescence of Eu3+in LaF3embedded nanocomposite for light emitting diode.Acta Mater.,2010,58:3035.
[6]Lin H,Chen D Q,Yu Y L,Shan Z F,Huang P,Wang Y S,Yuan J L.Nd3+-sensitized upconversion white light emission of Tm3+/Ho3+bridged by Yb3+inβ-YF3nanocrystals embedded transparent glass ceramics.J.Appl.Phys.,2010,107:103511.
[7]Chen D Q,Yu Y L,Lin H,Huang P,Weng F Y,Shan Z F,Wang Y S.CeF3-based glass ceramic:a potential luminescent host for white-light-emitting diode.Opt.Lett.,2009,34:2882.
[8]Huang S,Wei X T,Chen Y H,Yin M.Luminescence properties of a single-host phosphor Ba1.8–w Srw Li0.4SiO4:Ce3+,Eu2+,Mn2+for WLED.J.Rare Earths,2013,31:227.
[9]Liu W R,Lin C C,Chiu Y C,Yeh Y T,Jang S M,Liu R S.ZnB2O4:Bi3+,Eu3+:a highly efficient,red-emitting phosphor.Opt.Express,2010,18:2946.
[10]Sun H Y,Zhang X Y,Bai Z H.Synthesis and characterization of nano-sized YAG:Ce,Sm spherical phosphors.J.Rare Earths,2013,31:231.
[11]Kang D,Yoo H S,Jung S H,Kim H,Jeon D Y.Synthesis and photoluminescence properties of a novel red-emitting Na2Y2Ti3O10:Eu3+,Sm3+phosphor for white-light-emitting diodes.J.Phys.Chem.C,2011,115:24334.
[12]Lanfredia S,Gênovaa D H M,Britob I A O,Limac A R F,Nobrea M A L.Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder.J.Solid State Chem.,2011,184:990.
[13]Almudena T P,Ricardo J,JoséM,González C,Ester G G.Structural effects behind the low temperature nonconventional relaxor behavior of the Sr2NaNb5O15bronze.Inorg.Chem.,2011,50:12091.
[14]Chen Y,Wang J,Liu C M,Kuang X J,Su Q.A host sensitized reddish-orange Gd2MoO6:Sm3+phosphor for light emitting diodes.Appl.Phys.Lett.,2011,98:081917.
[15]Liu T C,Cheng B M,Hu S F,Liu R S.Highly stable red oxynitrideβ-SiAlON:Pr3+phosphor for light-emitting diodes.Chem.Mater.,2011,23:3698.
[16]Li Y Q,Wang Y H,Xu X H,Gong Y,Wang N.Electronic structures and Pr3+photoluminescence characteristics in fresnoite,Sr-frenoite,and Ge-frenoite.J.Am.Ceram.Soc.,2011,94:496.