Organic Light-Emitting Diodes Preparation by Solution Process, Part II: Electrodes

Soleimani Gorgani, Atasheh; Pishvaei, Maliheh; Gorji Kandi, Saeideh; Najafi, Frhood; Yeke Fallah, Vahide

Organic Light-Emitting Diodes Preparation by Solution Process, Part II: Electrodes

Authors

¹ Department of Printing Science and Technology , Institute for Color Science and Technology

² Department of Resins and Additives, Institute for Color Science and Technology

³ Department of Polymer & Color Engineering, Amirkabir University of Technology

⁴ Department of Resins and Additives , Institute for Color Science and Technology

⁵ Department of Printing Science and Technolog, Institute for Color Science and Technology

Abstract

In recent years the organic light-emitting diodes (OLEDs) as smart electronic devices have been successfully developed. Typically, the structure of OLEDs includes an indium tin oxide (ITO) transparent conductive anode, a hole transporting layer (HTL), an emissive layer (EML), an electron transporting layer (ETL), and a metallic cathode. Solution process is more appropriate than other technologies such as vacuum deposition for producing flexible displays. Many efforts have been devoted in the developing the solution processable materials, which have resulted a way to achieve printable roll-to-roll organic optoelectronic devices. The first part of this article described the hole transporting, electron transporting and active layers (HTL, EML, ETL) that able to coat by solution processing technologies such as ink- jet printing and spin coating. Since the anode and cathode layers in conventional OLEDs are produced by non-solution process; therefore, making electrodes are a major challenge in achieving fully solution process. Hence, the second part of this paper discussed about the soluble materials, which used as the anode and cathode in OLED by solution processes

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