Title :
Studies on carrier confinement for polymer electroluminescent devices with multilayer structure
Author :
Liu, S.Y. ; Ma, Y.G. ; Wu, Junyong ; Tang, J.G. ; Huang, J.S. ; Tian, U.J. ; Shen, J.C.
Author_Institution :
Nat. Lab. of Integrated Opt. Electron., Jilin Univ., Changchun, China
fDate :
31 Oct-3 Nov 1994
Abstract :
Recently, high luminance and high efficiency were realized in organic thin-film electroluminescence devices with multilayer structure, which include an emitting layer, a hole transporting layer, and an electron transporting layer. Generally these carrier transporting layers have the properties of inhibiting different type carriers such as transporting hole while inhibition electrons, by which the carrier are confinement in emitting layer. In this letter, we report some properties of hole blocking layers which were realized in a double layer structure with ITO/emitting layer/hole blocking layer/Al. In this structure, the emitting layer was 1,1,4,4,-tetraphenyl-1,3-butadiene(TPB) doped poly(N-vinylcarbazole) (PVK), which has large hole mobility, and hole blocking layer was PBD
Keywords :
optical polymers; 1,1,4,4,-tetraphenyl-1,3-butadiene(TPB) doped poly(N-vinylcarbazole); Al; ITO; ITO/emitting layer/hole blocking layer/Al; InSnO; carrier confinement; electron transporting layer; emitting layer; high efficiency; high luminance; hole blocking layer; hole transporting layer; inhibition electrons; large hole mobility; multilayer structure; organic thin-film electroluminescence devices; polymer electroluminescent devices; transporting hole; type carriers; Carrier confinement; Charge carrier processes; Electrodes; Electroluminescent devices; Electron emission; Indium tin oxide; Integrated optics; Nonhomogeneous media; Polymers; Voltage;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1994. LEOS '94 Conference Proceedings. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-1470-0
DOI :
10.1109/LEOS.1994.586614
