The optical properties of N,N’-bis (Inaphthyl)N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine (NPB) and tris (8-hydroxyquinolinato) aluminum (Alq3) organic materials used as hole transport and electron transport layers i...The optical properties of N,N’-bis (Inaphthyl)N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine (NPB) and tris (8-hydroxyquinolinato) aluminum (Alq3) organic materials used as hole transport and electron transport layers in organic light-emitting devices (OLED) have been investigated. The NPB and Alq3 layers were prepared using thermal evaporation method. The results show that the energy band gap of Alq3 is thickness independence while the energy band gap of NPB decreases with the increasing of sample thickness. For the case of photoluminescence the Alq3 with thickness of 84 nm shows the highest relative intensity peak at 510 nm.展开更多
Tris(8-hydroxyquinolinato)aluminium(AlQ_(3)),a classic fluorescent molecule insensitive to oxygen,is encapsulated as a vip fluorophore into a highly porous coordination framework[Zn_(4)O(bpz)_(2)(bdc)](MAF-X10,H_(2)...Tris(8-hydroxyquinolinato)aluminium(AlQ_(3)),a classic fluorescent molecule insensitive to oxygen,is encapsulated as a vip fluorophore into a highly porous coordination framework[Zn_(4)O(bpz)_(2)(bdc)](MAF-X10,H_(2)bpz=3,3’,5,5’-tetramethyl-4,4’-bipyrazole,H_(2)bdc=1,4-benzenedicarboxylic acid)to obtain a highly luminescent host-vip hybrid material AlQ_(3)@MAF-X10 combining the advantages of excellent fluorescence of AlQ_(3),high oxygen permeability of MAF-X10,and the resonance energy transfer between AlQ_(3) and MAF-X10.Photoluminescence studies showed that AlQ_(3)@MAF-X10 exhibits yellowish green fluorescence with a Stokes shift(9606 cm^(-1))as large as those of phosphorescent noble metal complexes,long lifetime(37.4 ns)and a considerable oxygen permeability(4.4×10^(-9) mol cm^(-1) s^(-1) bar^(-1)),giving rise to high oxygen sensitivity(88.5% quenched at 1 bar,i.e.,I_(0)/I_(100)=8.7,K_(SV)=7.6 bar^(-1))with fast response and good reversibility.展开更多
文摘The optical properties of N,N’-bis (Inaphthyl)N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine (NPB) and tris (8-hydroxyquinolinato) aluminum (Alq3) organic materials used as hole transport and electron transport layers in organic light-emitting devices (OLED) have been investigated. The NPB and Alq3 layers were prepared using thermal evaporation method. The results show that the energy band gap of Alq3 is thickness independence while the energy band gap of NPB decreases with the increasing of sample thickness. For the case of photoluminescence the Alq3 with thickness of 84 nm shows the highest relative intensity peak at 510 nm.
基金supported by the“973 Project”(2014CB845602 and 2012CB821706)NSFC(21225105,21290173,and 21473260).
文摘Tris(8-hydroxyquinolinato)aluminium(AlQ_(3)),a classic fluorescent molecule insensitive to oxygen,is encapsulated as a vip fluorophore into a highly porous coordination framework[Zn_(4)O(bpz)_(2)(bdc)](MAF-X10,H_(2)bpz=3,3’,5,5’-tetramethyl-4,4’-bipyrazole,H_(2)bdc=1,4-benzenedicarboxylic acid)to obtain a highly luminescent host-vip hybrid material AlQ_(3)@MAF-X10 combining the advantages of excellent fluorescence of AlQ_(3),high oxygen permeability of MAF-X10,and the resonance energy transfer between AlQ_(3) and MAF-X10.Photoluminescence studies showed that AlQ_(3)@MAF-X10 exhibits yellowish green fluorescence with a Stokes shift(9606 cm^(-1))as large as those of phosphorescent noble metal complexes,long lifetime(37.4 ns)and a considerable oxygen permeability(4.4×10^(-9) mol cm^(-1) s^(-1) bar^(-1)),giving rise to high oxygen sensitivity(88.5% quenched at 1 bar,i.e.,I_(0)/I_(100)=8.7,K_(SV)=7.6 bar^(-1))with fast response and good reversibility.
