title: A dual-scale metal nanowire network transparent conductor for highly efficient and flexible organic light emitting diodes.
abstract: Although solution processed metal nanowire (NW) percolation networks are a strong candidate to replace commercial indium tin oxide, their performance is limited in thin film device applications due to reduced effective electrical areas arising from the dimple structure and percolative voids that single size metal NW percolation networks inevitably possess. Here, we present a transparent electrode based on a dual-scale silver nanowire (AgNW) percolation network embedded in a flexible substrate to demonstrate a significant enhancement in the effective electrical area by filling the large percolative voids present in a long/thick AgNW network with short/thin AgNWs. As a proof of concept, the performance enhancement of a flexible phosphorescent OLED is demonstrated with the dual-scale AgNW percolation network compared to the previous mono-scale AgNWs. Moreover, we report that mechanical and oxidative robustness, which are critical for flexible OLEDs, are greatly increased by embedding the dual-scale AgNW network in a resin layer.
authors.affiliation: Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, Gwanak-gu, Seoul, South Korea. maxko@snu.ac.kr and Department of Electrical Engineering and Computer Science, the University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Jinhwan
authors.initials: J
authors.lastname: Lee
authors.affiliation: School of Electrical and Computer Engineering, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea. chlee7@snu.ac.kr.
authors.forename: Kunsik
authors.initials: K
authors.lastname: An
authors.affiliation: Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, Gwanak-gu, Seoul, South Korea. maxko@snu.ac.kr.
authors.forename: Phillip
authors.initials: P
authors.lastname: Won
authors.affiliation: Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea and Advanced Institutes of Convergence Technology, Suwon, South Korea.
authors.forename: Yoonseok
authors.initials: Y
authors.lastname: Ka
authors.affiliation: Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea and Advanced Institutes of Convergence Technology, Suwon, South Korea.
authors.forename: Hyejin
authors.initials: H
authors.lastname: Hwang
authors.affiliation: Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, Gwanak-gu, Seoul, South Korea. maxko@snu.ac.kr.
authors.forename: Hyunjin
authors.initials: H
authors.lastname: Moon
authors.affiliation: School of Electrical and Computer Engineering, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea. chlee7@snu.ac.kr.
authors.forename: Yongwon
authors.initials: Y
authors.lastname: Kwon
authors.affiliation: Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, Gwanak-gu, Seoul, South Korea. maxko@snu.ac.kr.
authors.forename: Sukjoon
authors.initials: S
authors.lastname: Hong
authors.affiliation: Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea and Advanced Institutes of Convergence Technology, Suwon, South Korea.
authors.forename: Changsoon
authors.initials: C
authors.lastname: Kim
authors.affiliation: School of Electrical and Computer Engineering, and Inter-University Semiconductor Research Center, Seoul National University, Gwanak-gu, Seoul, South Korea. chlee7@snu.ac.kr.
authors.forename: Changhee
authors.initials: C
authors.lastname: Lee
authors.affiliation: Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, Gwanak-gu, Seoul, South Korea. maxko@snu.ac.kr.
authors.forename: Seung Hwan
authors.identifier: http://orcid.org/0000-0002-7477-0820
authors.initials: SH
authors.lastname: Ko