Magneto-Conductance in Tri-(8-Hydroxyquinoline)Aluminum-Based Organic Light Emitting Diodes  

作　　者：XU Kai YANG De-Zhi MA Dong-Ge 许凯;杨德志;马东阁(State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;Graduate University of the Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022 [2]Graduate University of the Chinese Academy of Sciences,Beijing 100049

出　　处：《Chinese Physics Letters》2013年第8期140-143,共4页中国物理快报（英文版）

基　　金：Supported by the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(20921061);the National Natural Science Foundation of China under Grant Nos 50973104,60906020,21161160442,61036007,and 60937001;the National Basic Research Program of China under Grant Nos 2009CB623604 and 2009CB930603;the Foundation of Jilin Research Council(20090127,201105028)。

摘　　要：The origin of magneto-conductance(MC)in tri-(8-hydroxyquinoline)-aluminum(Alq3)-based organic light emitting diodes is investigated.Our results clearly show that the generated MC is related to the singlet polaron pair dissociation.Further studies on the MC in an electron blocking layer N,N'-bis(lnaphthyl)-N,N'-diphenyl-l,l'-biphentl-4,4'-diamine(NPB)and a hole blocking layer 2,2',2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole(TPBi)-based devices indicate that the holes reaching the cathode from the dissociation of singlet polaron pairs on Alq3 are the main cause of the MC generation.It is found that the MC can be significantly reduced by doping a red fluorescence dye DCJTB as a hole trapper in Alq3.

关 键 词：ALQ3 POLARON doping 

分 类 号：TN3[电子电信—物理电子学]