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OALib Journal期刊
ISSN: 2333-9721
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均相有序双钙钛矿sr2camoo6:eu3+荧光粉的制备及其发光性能
, PP. 30-37
Keywords: 双钙钛矿,edta-柠檬酸联合络合法,荧光粉,白光leds
Abstract:
采用乙二胺四乙酸(edta)-柠檬酸联合配位法在较低温度下制备eu3+掺杂的双钙钛矿sr2camoo6橙红色荧光粉,借助x线衍射、扫描电镜、紫外可见漫反射光谱和荧光光谱研究不同煅烧温度下粉体的结构和发光性能,并进行结构精修和态密度的第一性原理计算。结果表明:在900℃下即得到b位高度有序的离子掺杂的双钙钛矿粉体,其结构为bo6八面体周期性间隔排列且小角度倾斜的空间群为p21/n的正交双钙钛矿结构;粉体在近紫外区强而宽的吸收源于moo6八面体中o2p轨道到mo4d轨道的电荷迁移,并由此发射以无禁戒的磁偶极跃迁橙光为主,但在蓝光激发下以发射宇称禁戒部分解除的电偶极红光为主;随着煅烧温度的升高,粉体的晶粒尺寸、b位有序度及颗粒尺寸都增大,1100℃下煅烧的粉体具有最高的发光强度。
| [1] | narukaway,nikii,izunok,etal.phosphor-conversionwhitelightemittingdiodeusingingannear-ultravioletchip[j].japanesejournalofappliedphysics:letters,2002,41(4a):371-373.
|
| [2] | yes,xiaof,panyx,etal.phosphorsinphosphor-convertedwhitelight-emittingdiodesrecentadvancesinmaterials,techniquesandproperties[j].materialsscience&engineeringr-reports,2010,71(1):1-34.
|
| [3] | 张其土,张乐,韩朋德,等.白光led用光转换无机荧光粉[j].化学进展,2011,23(6):1108-1122.
|
| [4] | kimt,kangs.potentialredphosphorforuv-whiteleddevice[j].journalofluminescence,2007,122:964-966.
|
| [5] | xiea,yuanxm,wangjj,etal.synthesisandphotoluminescencepropertyofredphosphorslieu1-xyx(wo4)0.5(moo4)1.5forwhiteled[j].scienceinchinaseriese:technologicalsciences,2009,52(7):1913-1918.
|
| [6] | guocf,chent,luanl,etal.luminescentpropertiesofr2(moo4)3:eu3+(r=la,y,gd)phosphorspreparedbysol-gelprocess[j].journalofphysicsandchemistryofsolids,2008,69(8):1905-1911.
|
| [7] | sivakumarv,varadarajuuv.synthesis,phasetransitionandphotoluminescencestudiesoneu3+-substituteddoubleperovskites-anovelorange-redphosphorforsolid-statelighting[j].journalofsolidstatechemistry,2008,181(12):3344-3351.
|
| [8] | segallmd,lindanpjd,probertmj,etal.first-principlessimulation:ideas,illustrationsandthecastepcode[j].journalofphysics:condensedmatter,2002,14:2717-2744.
|
| [9] | sivakumarv,varadarajuuv.apromisingorange-redphosphorundernearuvexcitation[j].electrochemicalandsolidstateletters,2006,9(6):35-38.
|
| [10] | steele-robertv.thestoryofanewlightsource[j].naturephotonics,2007,1(1):25-26.
|
| [11] | poncefa,bourdp.nitride-basedsemiconductorsforblueandgreenlight-emittingdevices[j].nature,1997,386(6623):351-359.
|
| [12] | 贺香红,周健,连宁,等.白光led用新型红色荧光粉的组成与发光性能的关系[j].硅酸盐通报,2009,28(4):741-750.
|
| [13] | 张艳.钼酸盐红色荧光粉的水热合成及性能研究[d].石家庄:河北师范大学,2009.
|
| [14] | 王涛,井艳军,朱月华,等.白光led用钨、钼酸盐红色荧光粉的研究进展[j].中国照明电器,2008(2):16-20.
|
| [15] | shisk,liuxr,gaoj,etal.spectroscopicpropertiesandintensered-lightemissionof(ca,eu,m)wo4(m=mg,zn,li)[j].spectrochimicaacta:molecularandbiomolecularspectroscopy,2008,69(2):396-399.
|
| [16] | chenct,huangcy,linym,etal.structureandmicrowavedielectricpropertyrelationsinbariumcobaltmagnesiumniobateceramics[j].japanesejournalofappliedphysics,2011,50(9):091503-091508.
|
| [17] | haoj,cociveram.opticalandluminescentpropertiesofundopedandrare-earth-dopedga2o3thinfilmsdepositedbyspraypyrolysis[j].journalofphysicsd:appliedphysics,2002,35:433.
|
| [18] | webermj.multiphononrelaxationofrare-earthionsinyttriumorthoaluminate[j].physicalreview:b,1973,8(1):54-64.
|
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