Self-assembled monolayer modified MoO3/Au/MoO3 multilayer anodes for high performance OLEDs

• Published in: Electronic materials letters Vol. 13; no. 1; pp. 16 - 24
• Main Authors: Jeong, Daekyun, Lim, Chefwi, Kim, Myeonggi, Jeong, Kyunghoon, Kim, Jae-Hun, Kim, Jiyoung, Park, Jin-Goo, Min, Kyeong-Sik, Lee, Jaegab
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 2017; Springer Nature B.V; 대한금속·재료학회
• Subjects: Anodes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coated electrodes; Condensed Matter Physics; Deposition; Dipole moments; Electrodes; Gold; Materials Science; Molybdenum oxides; Monolayers; Multilayers; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; Optoelectronic devices; Organic light emitting diodes; Self-assembled monolayers; Self-assembly; Stability; Surface energy; Vapor phases; Wetting; Work functions; 전자/정보통신공학; Au/MoO; 3-aminopropyltrimethoxysilane (APS); 1H,1H,2H,2H-perfluorodecyltrichlorosilane (PFS); MoO; organic light emitting diode (OLED); Self Assembled Monolayer (SAM)
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-017-6381-5

We control the work function and the surface energy of the MoO 3 /Au/MoO 3 (MAM) anode of OLEDs by modifying the top MoO 3 layer via vapor phase deposition. The performance and stability of the device are significantly altered depending on the dipole direction of the selfassembled monolayer (SAM) with permanent dipole moment inserted between N,N′-Bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB) film and a MAM anode as well as on the interfacial wetting between the SAM and NPB layer. A CF 3 -terminated monolayer on a MAM electrode improved the performance and stability of the OLEDs relative to a reference device with only a MAM electrode, demonstrating that coating with SAMs via vapor phase deposition is an effective method to engineer the interface of MAM electrode optoelectronic devices.