TY - JOUR
T1 - Organic light emitting devices based on exciplex interaction from blends of charge transport molecules
AU - Yang, Jihua
AU - Gordon, Keith C.
N1 - Funding Information:
The authors acknowledge support from New Economy Research Fund (UOOX0217).
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2003/7/10
Y1 - 2003/7/10
N2 - Exciplex electroluminescence of indium-tin-oxide glass (ITO)/poly(N -vinylcarbazole)(PVK): N ,N′-diphenyl- N,N′-bis(3-methylphenyl)-[1,1′- biphenyl]-4,4′-diamine(TPD):2,5-bis (5-tert-butyl-2-benzoxazolyl) thiophene (BBOT)/Al devices have been investigated in comparison with ITO/PVK:BBOT/Al device. While the ITO/PVK:BBOT/Al device shows emission dominated by exciplex interaction of PVK with BBOT, the ITO/PVK:TPD:BBOT/Al devices show emission color adjustable by the hybrid exciplex interaction of TPD with BBOT, and this exciplex becomes the primary recombination center at a critical TPD doping concentration. The device efficiency can be improved markedly by incorporating hole transporting poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) and electron transporting 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/tris-(8-hydroxyquinoline) aluminum (Alq3) layers in a structure of ITO/PEDOT:PSS/PVK:TPD:BBOT/BCP/Alq3/Al.
AB - Exciplex electroluminescence of indium-tin-oxide glass (ITO)/poly(N -vinylcarbazole)(PVK): N ,N′-diphenyl- N,N′-bis(3-methylphenyl)-[1,1′- biphenyl]-4,4′-diamine(TPD):2,5-bis (5-tert-butyl-2-benzoxazolyl) thiophene (BBOT)/Al devices have been investigated in comparison with ITO/PVK:BBOT/Al device. While the ITO/PVK:BBOT/Al device shows emission dominated by exciplex interaction of PVK with BBOT, the ITO/PVK:TPD:BBOT/Al devices show emission color adjustable by the hybrid exciplex interaction of TPD with BBOT, and this exciplex becomes the primary recombination center at a critical TPD doping concentration. The device efficiency can be improved markedly by incorporating hole transporting poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) and electron transporting 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/tris-(8-hydroxyquinoline) aluminum (Alq3) layers in a structure of ITO/PEDOT:PSS/PVK:TPD:BBOT/BCP/Alq3/Al.
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U2 - 10.1016/S0009-2614(03)00950-3
DO - 10.1016/S0009-2614(03)00950-3
M3 - Article
AN - SCOPUS:1642551302
SN - 0009-2614
VL - 375
SP - 649
EP - 654
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 5-6
ER -