Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

The Optimization of Hole Injection using Composite layer Containing of Graphene Oxide/Molybdenum Oxide in order to Enhance in Lifetime of Organic Light Emitting Diode

Document Type : Original Reaearch Article

Authors
Hassan Alehdaghi
Mohammad Zirak
Department of physics, Hakim Sabzevari University, Sabzevar, Iran.
10.30501/jamt.2019.99514
Abstract
As to the crisis of energy in the recent years, devices manufacturing industry must be go toward the optimizing of energy consumption and increment in the lifetime leading to reduce production cost. Organic light emitting diodes (OLED) are one of the modern generations in the lighting industry that have many advantages such as being light and thin, flexibility, ability to be transparent, and easy to fabricate. These devices consist of hole injecting layer/electron and emissive layer. The main role of hole/electron injection layers is injection of charge carriers to emissive layer where electrons and holes recombinate and create photons. In this work we focused on optimization of hole injection in order to increase lifetime of device. We used the different composition of molybdenum oxide (MoOx) and graphene oxide (GO) in hole injection layer. The maximum efficiency of the devices owned to the composite thin film with 1:1 value ratio (MoOx:GO) that it could be reached to 7.5 lm/W.  The lifetime of the optimization of composite was compared to the standard device fabricated with PEDOT:PSS so that the results showed a 30 times enhancement in lifetime.
Keywords
OLED
MoOx
GO
lifetime
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Journal of Advanced Materials and Technologies
Volume 8, Issue 3
Autumn 2019
Pages 71-77

  • Receive Date 18 April 2018
  • Revise Date 19 November 2018
  • Accept Date 07 May 2019