Robust Transparent and Conductive Gas Diffusion Multibarrier Based on Mg- and Al-Doped ZnO as Indium Tin Oxide-Free Electrodes for Organic Electronics

ACS Applied Materials & Interfaces
Jeong Hyun KwonKyung Cheol Choi

Abstract

Thin-film encapsulation is strictly required to protect transparent, flexible organic light-emitting diodes (OLEDs) based on plastic substrates with poor moisture barrier performances against water vapor and oxygen. However, additional encapsulation process makes OLED fabrication complex and expensive, resulting in lower yield and higher costs for the manufacture of OLEDs. Therefore, to develop simple, transparent conductive gas diffusion barrier (TCGDB) technologies by providing barrier performances to electrodes can be alternatives. Furthermore, TCGDB based on dielectric/metal/dielectric structures exhibit not only excellent barrier performances to protect metallic and organic layers against the ambient environment but also mechanical flexibility overcoming the brittleness of oxides. In this work, to improve the moisture-resistant, electrical, and optical properties of ZnO film, periodical dopant layers were inserted during the deposition of atomic layer deposition ZnO film. These dopant layers make the intrinsic ZnO film more optically and electrically functional. The dopant of MgO with a wide band gap enables blue-shifted optical transmittance, and the dopant of Al atoms makes doped ZnO more electrically conductive. In addi...Continue Reading

References

Jun 22, 2010·Nature Nanotechnology·Sukang BaeSumio Iijima
Feb 7, 2013·Advanced Materials·Chun-Ting ChouFeng-Yu Tsai
Mar 25, 2014·Nature Materials·Florian BouvilleSylvain Deville
Mar 20, 2015·Nature Communications·Hongkyu KangKwanghee Lee
Aug 28, 2015·Advanced Materials·Andreas BehrendtThomas Riedl
Jan 12, 2016·ACS Applied Materials & Interfaces·Hyo-Ju LeeSeong-Ju Park
Jun 3, 2016·ACS Applied Materials & Interfaces·Hong-Kyu SeoTae-Woo Lee
Apr 20, 2018·ACS Applied Materials & Interfaces·Jeong Hyun KwonKyung Cheol Choi

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