DOI: 10.5176/2301-3516_OPAP13.40
Authors: Omwati Rana, Ritu Srivastava, M. N. Kamalasanan, Omwati Rana, M. Zulfequar, and M. Husain
Abstract:
We show that the performance of organic lightemitting diodes (OLEDs) is improved by optimizing the thickness of strong electron acceptor tetrafluro-tetracyanoquinodimethane (F4TCNQ) inserted between indium tin oxide and 2,2’,7,7’- tetrakis-(N,N-di-4-methoxyphenylamino)-9,9’-spirobifluorene (spiroMeOTAD) From results of the electroluminescence (EL)
characteristics of OLEDs with various thicknesses of F4TCNQ, We found that the OLED with a 1nm-thick F4TCNQ had the
lower driving voltage and the increase in current efficiency among the OLEDs. These enhanced EL characteristics are
attributable to the formation of an Ohmic contact at the interfaces composed of ITO/ F4TCNQ/ spiro MeO TAD.
Keywords: Organic light emitting diodes, charge injection, Current–voltage characteristics, efficiency
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