169 resultados para Ce^3
Resumo:
(CE)[1,2 ] . ,CE (1 0 - 12 1 0 - 9L ) , . (FASI) CE[3] , CE ,[4 ] . [Ru(bpy) 2 + 3] (ECL ) CE (CE-ECL) . ,[5 7] . , , . TPA , 1 0 0 , Pro , , 1 0 46 . (TPA) (Pro) .1 TPA(Acros ) , Pro(...
Resumo:
CdSiO_3:RE~(3+)(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu)XRD10503CdSiO_3Y~(3+),La~(3+),Gd~(3+),Lu~(3+)Ce~(3+),Nd~(3+),Ho~(3+),Er~(3+),Tm~(3+),Yb~(3+)420 nm, Pr~(3+),Sm~(3+),Eu~(3+),Tb~(3+),Dy~(3+),420 nm,
Resumo:
The measurements of VUV-UV photoluminescence emission (PL) and photoluminescence excitation (PLE) spectra of rare earth ions activated strontium orthophosphate [Sr-3(PO4)(2):RE, RE = Ce, Sm, Eu, Tb] are performed. Whenever the samples are excited by VUV or UV light, the typical emission of Ce-3+,Ce- Sm3+, Eu3+, Eu2+ and Tb3+ ions can be observed in PL spectra, respectively. The charge transfer bands (CTBs) of Sm3+ and Eu3+ are found, respectively, peaking at 206 and 230nm. The absorption bands peaking in the region of 150-160 nm are assigned to the host lattice sensitization bands, i.e., the band-to-band transitions of PO43- grouping in Sr-3(PO4)(2). It is speculated that the first f-d transitions of Sm3+ (Eu3+), and the CTB of Tb3+ are, respectively, located around 165 (14 3) and 167 urn by means of VUV-UV PLE spectra and relational empirical formula, these f-d transitions or CT bands are included in the bands with the maxima at 150-160 nm, respectively. The valence change of europium from trivalent to divalent in strontium orthophosphate prepared in air is observe by VUV-UV PL and PLE spectra.
Resumo:
The luminescence properties of Ce3+, Gd3+, and Tb3+ have been investigated in the compound CaAl2B2O7. The single excitation band peaking at about 320 nm and single emission band peaking at about 384 nm for Ce3+, without the characteristic doublet, are attributed to the extensive crystal-field splitting of 4f ground state. The emission of Gd3+ consists of well-known sharp lines and two weak bands around 319.5 and 325 nm. These bands are due to the coupling of Gd3+ with BO33- groups. The green emission of Tb3+ is considerably sensitized by Ce3+. Energy transfer from Ce3+ to Tb3+ in CaAl2B2O7 is efficient. (C) 1997 Elsevier Science Ltd.
Resumo:
LaP_3O_9:CeGdTb.XLaP_3O_9,,,a=11.19(?),b=8.54(?),c=7.28(?).Ce~(3+),Ce~(3+)Gd~(3+),,Ce~(3+)Tb~(3+),Tb~(3+),LaP_3O_9:CeTb.Ce-TbGd,Gd~(3+).Ce~(3+),Ce~(3+)Gd~(3+),Ce~(3+)Tb~(3+).
Resumo:
Ce_xGd_(1-x)P_5O_(14), P2_1/c, Gd ,(1-x), Gd~(3+)314nm Ce~(3+), Ce~(3+) Gd~(3+)
Resumo:
With the method of high temperature solid state reaction and stockbarger, we synthesized a series of powder phosphors of KMgF3-Ce3+, KMg1-alphaMalphaF3-Ce3+(M = Be2+, Ca2+) and the single crystal of KMgF3-Ce3+. We tested their excitation and emission spectra, found two emission centers in KMgF3-Ce3+ and demonstrated that they resulted from different charge compensating ways. By the structural analysis on KMgF3-Ce-3+ from a four-cycle diffractometer and spectral analysis on KMg1-alphaMalphaF3-Ce3+(M = Be2+, Ca2+), we deduced that Ce3+ ion only.substituted K+ site in KMgF3.
Resumo:
,,CaS: Ce~(3+)CaS:Bi~(3+)N.Singh et al.(3)CaS:Cu,AlCaS:Cu,ClUV8075CaS :Cu~+,UV(366nm),100,
Resumo:
Ce_xGd_yTb_(1-x-y)P_5O_(14)..,P2_(1/c).Ce_(0.9)Gd_(0.1)P_5O_(14)Ce_(0.9)Tb_(0.1)P_5O_(14)La_(0.8)Gd_(0.1)Tb_(0.1)P_5O_(14).,GdCe_xTb_(1-x)P_5O_(14).Ce_xGd_yTb_(1-x-y)P_5O_(14)Ce~(3+)Tb~(3+),Ce~(3+),Tb~(3+)~5D_4~F_J~5D_3~7F_J.
Resumo:
Ln~(3+)Ce~(3+)Gd~(3+),Gd~(3+)Ce~(3+)Ce_xGd_(1-x)P_5O_(14)X,Ce_xGd_(1-x)P_5O_(14)CeP_5O_(14)
Resumo:
Tb K IQ_4KOHK_2S_2O_8, Tb .Tb Tb~(4+),,420nm.Ce~(3+) KIO_4KOH , Ce~(4+),Ce~(4+)420nm ,,,. Tb 510~(-5)510~(-4)M , Beer ,Tb 1% Tb ,
Resumo:
LaF_3,LuF_3,CaF_2,SrF_2BaF_2Ce~(3+)5d,,5d
Resumo:
0.010.1molEu_2O_3Dy_2O_3CeO_2,,,Eu~(3+)~5D_0~7F_2,Dy~(3+),Ce~(3+),
Resumo:
Ln~(3+)Ce~(3+),Eu~(3+)Yb~(3+)CeP_5O_(14)Ce~(3+),Ce~(3+)302nm,Ce~(3+),Yb~(3+),Yb~(3+),Ce~(3+)
