Cold welding of organic light emitting diode: Interfacial and contact models
J. Asare,
S. A. Adeniji,
O. K. Oyewole,
B. Agyei-Tuffour,
J. Du,
E. Arthur,
A. A. Fashina,
M. G. Zebaze Kana,
W. O. Soboyejo
Affiliations
J. Asare
Department of Theoretical and Applied Physics, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
S. A. Adeniji
Department of Materials Science and Engineering, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
O. K. Oyewole
Department of Theoretical and Applied Physics, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
B. Agyei-Tuffour
Department of Materials Science and Engineering, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
J. Du
Department of Mechanical & Nuclear Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
E. Arthur
Department of Materials Science and Engineering, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
A. A. Fashina
Department of Theoretical and Applied Physics, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
M. G. Zebaze Kana
Department of Theoretical and Applied Physics, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
W. O. Soboyejo
Department of Materials Science and Engineering, African University of Science and Technology, Km 10 Airport Road, Abuja, Federal Capital Territory, Nigeria
This paper presents the results of an analytical and computational study of the contacts and interfacial fracture associated with the cold welding of Organic Light Emitting diodes (OLEDs). The effects of impurities (within the possible interfaces) are explored for contacts and interfacial fracture between layers that are relevant to model OLEDs. The models are used to study the effects of adhesion, pressure, thin film layer thickness and dust particle modulus (between the contacting surfaces) on contact profiles around impurities between cold-welded thin films. The lift-off stage of thin films (during cold welding) is then modeled as an interfacial fracture process. A combination of adhesion and interfacial fracture theories is used to provide new insights for the design of improved contact and interfacial separation during cold welding. The implications of the results are discussed for the design and fabrication of cold welded OLED structures.
