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Hole transporting layers for organic light emitting diodes

R. TOMOVA1,* , P. PETROVA1, R. STOYCHEVA-TOPALOVA1, A. BUROFF1, J. PIROV1

Affiliation

  1. Central Laboratory of Photoprocesses “Acad. J. Malinowski”, Bulgarian Academy of Sciences, Acad. G Bonchev st., bl. 109, 1113 Sofia, Bulgaria

Abstract

In this work, we have investigated poly(9-vinylcarbazole) (PVK) and N,N’-Bis(3-methylphenyl)- N,N’-diphenylbenzidine (TPD), and the incorporation of TPD in PVK, as hole transporting layers (HTL) for organic light emitting diodes (OLED’s) based on 8-hydroxyquinoline aluminium (Alq3) as a light-emitting and electron transporting layer. The sandwich structures ITO/HTL/Alq3/Al have been obtained on commercial polyethylene terеphtalate (PET) substrates, coated with indium tin oxide (ITO). Several spin-coating solutions were evaluated for deposition of the polymer layer..

Keywords

OLED, PLED, 8-hydroxyquinoline aluminium (Alq3), Poly(9-vinylcarbazole) (PVK), N,N’-Bis(3-methylphenyl)- N,N’-diphenylbenzidine (TPD).

Submitted at: Nov. 1, 2006
Accepted at: Feb. 15, 2007

Citation

R. TOMOVA, P. PETROVA, R. STOYCHEVA-TOPALOVA, A. BUROFF, J. PIROV, Hole transporting layers for organic light emitting diodes, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 2, pp. 501-504 (2007)