HomeAbout JournalEditorial BoardSubscriptionsContacts UsCHINESE
Home >> MagazineArticle
Author:LUOXixian(Optoelectr… PhysicsDepartment DalianMaritimeUniver… Dalian116026 Liaoning China) 
Keyword:white light emitting diode nitridosilicates broad excitation band phosphor 
Year,volume(Issue):page number:2008,36(9):1335-1342

High-power white light-emitting diodes(LEDs)with warm white light output are required for the rapid advances in general illumination applications of white LEDs.However,the currently employed oxide phosphors,such as cerium doped yttrium aluminum garnet(YAG:Ce)and Eu2+activated alkaline earth silicate,can hardly meet the challenge;therefore,it is urgent to develop novel phosphors with red-emitting components and excellent temperature-dependent properties.A series of nitridosilicates can be obtained through SiO2,Si2N2O or Si3N4 with M'2O(M'=alkali metals),MO(M=alkaline earth,Zn),Re2O3(Re=rare earth,Al,B),M'3N,M3N2, ReN,AlN,or BN,etc.,such as:M'Si 2 N3,MSiN2,M2Si5N8,MSi2N5,Si3N4·ReN,Si3N4·2ReN,Si3N4·3ReN,Si3N4·6ReN,MReSi4N7, MAlSiN3,Si2N2O·MO,Si2N2O·3MO,Si2N2O·Re2O3,Si2N2O·2Re2O3,Si3N4·2MO,Si3N4·Re2O3,2Si3N4·Re2O3,and SiO2·ReN...... Some of these silicon nitrides/oxynitrides based on(Si,Al)(O,N)4 tetrahedra building units possess higher chemical and thermal stability and stronger covalency than that of the corresponding oxide.Some rare earth ions(such as Eu2 +,Ce 3+and Yb 2+)with a 5d→4f transition exhibit very broad excitation bands and highly efficient long-wavelength emission characteristics in these silicon nitride/oxynitride hosts.Moreover,the chemical composition can be altered over a broad range without changing the crystal structure, which makes it possible to adjust the emission color and chromaticity from the green region to the red region;for example,yel- low-green emission can be realized in silicon oxynitride hosts,and red emission can be achieved in silicon nitride hosts.So cool white to warm white light output can be realized by white LEDs based on these silicate nitride/oxynitride phosphors;furthermore,these white LEDs show the highest color stability with temperature and drive current so far. Recent progress in silicon nitride/oxynitride host luminescent materials with broad excitation bands for phosphor-converted white LEDs are briefly reviewed in this paper,including the crystal structure,spectroscopic properties and application characteristics.We also discuss the application prospects and the trends of research and development of these phosphors.

women want men how to cheat how do i know if my wife cheated
read go reasons wives cheat on their husbands
my husband cheated on me click here women who cheat on husband
abortion pill abortion pill abortion pill
bystolic copay card click bystolic coupon voucher
Foundation item:
国家“863”计划(2004AA001530;2006AA03A137);; 大连海事大学青年教师科研资助及重点项目基金(DLMU-ZL-200713)资助项目
About The Author:
online click open
why do wife cheat on husband why wifes cheat how to cheat wife
my wife cheated on me now what men and women husband cheat

[1]肖志国,石春山,罗昔贤.半导体照明用发光材料[M].北京:化学工业出版社,2008:28–60.XIAO Z G,SHI C S,LUO X X.Luminescence material for semicon-ducting illumination(in Chinese),Beijing:Chemical Industry Press,2008:28–60. [2]SCHLOTTER P,BAUR J,HIELSCHER C,et al.Fabrication and characterization of GaN:InGaN:AlGaN double heterostructure LEDs and their application in luminescence conversion LEDs[J].Mater Sci Eng B,1999,59:390–394. [3]罗昔贤,曹望和,孙菲.硅酸盐基质白光LED用宽激发带发光材料研究进展[J].科学通报,2008,53(9):1010–1016.LUO X X,CAO W H,SUN F.Chin Sci Bull(in Chinese),2008,53(9):1010–1016. [4]COLVIN V,SCHLAMP M,ALIVISATOS A.Light-emitting diodesmade from cadmium selenide nanocrystals and a semiconducting polymer[J].Nature,1994,370:354–357. [5]MUELLER G O,MUELLER-M R,KRAMES M R.Illumination grade white LEDs[J].Proc SPIE,2002,4776:122–130. [6]LIN J,SHI Y J,YANG Y.Improving the performance of polymer light-emitting diodes using polymer solid solutions[J].Appl Phys Lett,2001,79(5):578–580. [7]OHNO Y.Spectral design considerations for white LED color rendering[J].Opt Eng,2005,44(11):111302–111309. [8]?UKAUSKAS A,GASKA R,SHUR M S.White complementary solid-state lamp[J].Leukos,2004,1(1):59–66. [9]HU Y S,ZHUANG W D,YE H Q,et al.Preparation and luminescent properties of(Ca1–xSrx)S:Eu2+red-emitting phosphor for white LED[J].J Lumin,2005111(3):139–145. [10]ZHANG X M,LIANG L F,ZHANG J H,et al.Luminescence proper-ties of(Ca1–xSrx)Se:Eu2+phosphors for white LEDs application[J].Mater Lett,2005,59:749–753. [11]POORT S H M,BLOKPOEL W P,BLASSE G.Luminescence of Eu2+in barium and strontium aluminate and gallate[J].Chem Mater,1995,7:1547–1551. [12]HIROASKI N,OKADA A,MATOBA K.Sintering of Si3N4with the addition of rare-earth oxides[J].J Am Ceram Soc,1988,71:c144–c147. [13]OYAMA Y.Solid solution in the ternary system Si3N4–AlN–Al2O3[J].Jpn J Appl Phys,1972,11:760–761. [14]HAMPSHIRE S,PARK H K,THOMPSON D P,et al.Α'-Sialon ceramics[J].Nature,1978,274(31):880–882. [15]HINTZEN H T,VAN KREVEL J W H,BOTTY G I.Red emitting luminescent material[P].Eur Pat1104799A1.1999–11–30.and related patent US Pat6649946B2,US Pat6682663B2,US Pat2003024438A1,WO Pat01/39574A1,WO Pat01/40403A1. [16]LEE S S,LIM S,SUN S S,et al.Photoluminescence and electrolumi-nescence characteristics of CaSiN2:Eu phosphor[J].Proc SPIE-Int Soc Opt Eng,1997,3241:75–83. [17]HIROSAKI N,SAKUMA K,UEDA K.Light emitting device and lighting fixture[P].Jpn Pat WO2005/078811.2005–08–25. [18]NARUKAWA Y.White-light LEDs[J].Opt Photonics News,2004,15(4):25–29. [19]HAN B,MISHRA K C,RAUKAS M,et al.A Study of Luminescence from Tm3+,Tb3+,and Eu 3+in AlN Powder[J].J Electrochem Soc,2007,154(9):J262–J266. [20]JANSEN S R,MIGCHELS J,HINTZEN H T,et al.Eu-Doped barium aluminum oxynitride with theβ-alumina-type structure as new blue-emitting phosphor[J].J Electrochem Soc,1999,146:800–806. [21]SAKUMA K,HIROSAKI N,KIMURA N,et al.White light-emitting diode lamps using oxynitride and nitride phosphor materials[J].IEICE Trans Electron,2005,E88–C(11):2057–2064. [22]TAMAKI H,KAMESHIMA M,TAKASHIMA S,et al.Nitride phosphor and method for preparation thereof,and light emitting device[P].Eur Pat1433831A1,2004–06–30. [23]JUESTEL T,SCHMIDT T,HOEPPE H,et al.Illumination system comprising a radiation source and a fluorescent material[P].WO Pat2004/055910A1.2002–12–13. [24]VAN KREVEL J W H,HINTZEN H T,METSELAAR R,et al.Long wavelength Ce3+emission in Y—Si—O—N materials[J].J Alloys Compd,1998,268:272–277. [25]VAN KREVEL J W H,HINTZEN H T,METSELAAR R.On the Ce3+luminescence in the melilite-type oxide nitride compound Y2Si3–x?AlxO3+xN4–x[J].Mater Res Bull,2000,35:747–754. [26]HENNING A H,FLORIAN S,OLIVER O,et al.Ca[Si2O2N2]—a novel layer silicate[J].Angew Chem Int Ed,2004,43:5540–5542. [27]LI Y Q,DELSING A C A,DE WITH G,et al.Luminescence proper-ties of Eu2+-activated alkaline-earth silicon-oxynitride MSi2O2–δN2+2/3δ(M=Ca,Sr,Ba):A promising class of novel LED conversion phos-phors[J].Chem Mater,2005,17:3242–3248. [28]KIMURA N,SAKUMA K,HIRAFUNE S,et al.Extrahigh color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode[J].Appl Phys Lett,2007,90:051109. [29]LUO X X,CAO W H,XIAO Z G,Investigation on the distribution of rare earth ions in strontium aluminate phosphors[J].J Alloys Compd,2006,416(1–2):250–255. [30]VOLKER B,THOMAS J,ANDRIES M,et al.Luminescence proper-ties of SrSi2O2N2doped with divalent rare earth ions[J].J Lumin,2006,121:441–449. [31]肖志国,罗昔贤.蓄光型发光材料及其制品,第二版[M].北京:化学工业出版社,2005:197–220.XIAO Z G,LUO X X.Long afterglow luminescence materials and the related applications,2nd ed(in Chinese),Beijing:Chemical Industry Press,2005:197–220. [32]LI Y Q,DE WITH G,HINTZEN H T,Luminescence properties of Eu2+-doped MAl2–xSixO4–xNx(M=Ca,Sr,Ba)conversion phosphor for white LED applications[J].J Electrochem Soc,2006,153(4):G278–G282. [33]HINTZEN H T,LI Y Q.Luminescent material and light emitting diode using the same[P].WO Pat2004/029177A1.2002–09–24. [34]MANDAL H,CAMUSCU N,THOMPSON D P,Comparison of the effectiveness of RARE-earth sintering additives on the high-temperature stability ofα-sialon ceramics[J].J Mater Sci,1995,30:5901–5909. [35]IZHEVSKIY V A,GENOVA L A,BRESSIANI J C,et al.Progress in sialon ceramics[J].J Eur Ceram Soc,2000,20:2275–2295. [36]CAO G Z,METSELAAR R.α'-sialon ceramics:a review[J].Chem Mater,1991,3:242–252. [37]MANDAL H.New developments inα-sialon ceramics[J].J Eur Ceram Soc,1999,19:2349–2357. [38]ELLENS A,HUBER G,KUMMER F,Illumination unit having at least one LED as light source[P].US Pat6657379.2003–12–2,and related patent,US Pat6670,748,US Pat6674233,US Pat2003094893(A1),Jap Pat2003206481(A),EP1296376(A3),DE10147040(A1). [39]KARUNARATNE B S B,LUMBY R J,LEWIS M H.Rare-earth-dopedα-sialon ceramics with novel optical properties[J].J Mater Res,1996,11(11):2790–2794. [40]SHEN Z J,NYGREN M,HALENIUS U.Absorption spectra of rare-earth-dopedα-sialon ceramics[J].J Mater Sci Lett,1997,16:263–266. [41]CHEN W W,SU X L,WANG P L,et al.Comparison of the luminescence properties of Dy3+inα-sialon and oxynitride glass[J].J Am Ceram Soc,2005,88(10):2955–2956. [42]VAN KREVEL J W H,VAN RUTTEN J W T,MANDAL H,et al.Luminescence properties of terbium-,cerium-,or europium-dopedα-sialon materials[J].J Solid State Chem,2002,165:19–24. [43]XIE R J,HIROSAKI N,MITOMO M,et al.Photoluminescence of cerium-dopedα-sialon materials[J].J Am Ceram Soc,2004,87:1368–1370. [44]XIE R J,HIROSAKI N,MITOMO M,et al.Photoluminescence of rare-earth-doped Ca-α-sialon phosphors:composition and concentration dependence[J].J Am Ceram Soc,2005,88(10):2883–2888. [45]XIE R J,MITOMO M,XU F F,et al.Preparation of Ca-α-sialon ceramics with compositions along the Si3N4–1/2Ca3N2:3AlN Line[J].Z Metallkd,2001,92(8):931–936. [46]XIE R J,MITOMO M,UHEDA K,et al.Preparation and luminescence spectra of calcium-and rare-earth(R=Eu,Tb,and Pr)-codopedα-sialon ceramics[J].J Am Ceram Soc,2002,85:1229–1234. [47]XIE R J,HIROSAKI N,SAKUMA K,et al.Eu2+-doped Ca-α-sialon:A yellow phosphor for white light-emitting diodes[J].Appl Phys Lett,2004,84(26):5404–5406. [48]XIE R J,HIROSAKI N,MITOMO M,et al.Optical properties of Eu2+inα-sialon[J].J Phys Chem B,2004,108:12027–12031. [49]HIROSAKI N,XIE R J,KIMOTO K,et al.Characterization and properties of green-emittingβ-sialon:Eu2+powder phosphors for white light-emitting diodes[J].Appl Phys Lett,2005,86:211905. [50]XIE R J,HIROSAKI N,MITOMO M,et al.Highly efficient white-light-emitting diodes fabricated with short-wavelength yellow oxynitride phosphors[J].Appl Phys Lett,2006,88:101104. [51]XIE R J,HIROSAKI N,MITOMO M,et al.Strong green emission from alpha-sialon activated by divalent ytterbimn under blue light irra-diation[J].J Phys Chem B,2005,109(19):9490–9494. [52]MITOMO M,XIE R J,HIROSAKI N,et al.Synthesis and photo-luminescence properties ofβ-sialon:Eu2+(Si6?zAlzOzN8?z:Eu2+)[J].J Electrochem Soc,2007,154(10):J314–J319. [53]HUPPERTZ H,SCHNICK W.Synthese,Kristallstruktur und eigens-chaften der nitridosilicate SrYbSi4N7und BaYbSi4N7[J].Z Anorg Allg Chem,1997,623:212–217. [54]ZHANG H C,HORIKAWA T,MACHIDA K.Preparation,structure,and luminescence property of Y2Si4N6C:Ce3+and Y2Si4N6C:Tb3+[J].J Electrochem Soc,2006,153(7):H151–H154. [55]INOUE Z,MITOMO M,NOBUO II.A crystallographic study of a new compound of lanthanum silicon nitride LaSi3N5[J].J Mater Sci,1980,15:2915–2920. [56]UHEDA K,TAKIZAWA H,ENDO T,et al.Synthesis and lumi-nescent property of Eu3+-doped LaSi3N5phosphor[J].J Lumin,2000,87–89:967–969. [57]PIAO X Q,HORIKAWA T,HANZAWA H,et al.Photoluminescence properties of Ca2Si5N8:Eu2+nitride phosphor prepared by carbothermal reduction and nitridation method[J].Chem Lett,2006,35(3):334–335. [58]UHEDA K,HIROSAKI N,YAMAMOTO H.Host lattice materials in the system Ca3N2–AlN–Si3N4for white light emitting diode[J].Phys Stat Sol(a),2006,203(11):2712–2717. [59]H?PPE H A,LUTZ H,MORYS P,et al.Luminescence in Eu2+-doped Ba2Si5N8:fluorescence,thermoluminescence,and upconversion[J].J Phy Chem Solids,2000,61:2001–2006. [60]LI Y Q,VAN STEEN J E J,VAN KREVEL J W H,et al.Lumines-cence properties of red-emitting M2Si5N8:Eu2+(M=Ca,Sr,Ba)LED conversion phosphors[J].J Alloys Compd,2006,417:273–279. [61]SCHLIEPER T,MILIUS W,SCHNICK W.High temperature synthe-ses and crystal structures of Sr2Si5N8and Ba2Si5N8[J].Z Anorg Allg Chem,1995,621:1380–1384. [62]HUPPERTZ H,SCHNICK W.Eu2Si5N8and EuYbSi4N7.The first nitridosilicates with a divalent rare earth metal[J].Acta Crystallogr,1997,C53:1751–1753. [63]LI Y Q,WITH G DE,HINTZEN H T.Luminescence properties of Ce3+-activated alkaline earth silicon nitride M2Si5N8(M=Ca,Sr,Ba)materials[J].J Lumin,2006,116:107–116. [64]UHEDA K,HIROSAKI N,YAMAMOTO Y,et al.Luminescence properties of a red phosphor,CaAlSiN3:Eu2+,for white light-emitting diodes[J].Electrochem Solid-State Lett,2006,9(4):H22–H25. [65]SAKUMA K,OMICHI K,KIMURA N,et al.Warm-white light-emitting diode with yellowish orange sialon ceramic phosphor[J].Opt Lett,2004,29:2001–2003. [66]MUELLER-MACH R,MUELLER G,KRAMES M R,et al.Highly efficient all-nitride phosphor-converted white light emitting diode[J].Phys Stat Sol(a),2005,202(9):1727–1732.

how to catch a cheater online go
bystolic copay card bystolic coupon voucher
cialis discount coupons coupons for cialis 2016 cialis 2015 coupon
Service and feedback:
Article download】【Add to Wishlist
Editorial Department of Journal of the Chinese Ceramic Society
Address: No.11 Sanlihe Road, Beijing, China    P.C.:100831