ARTICLE
Outcoupling-Enhanced Flexible Organic Light-Emitting Diodes on Ameliorated Plastic Substrate with Built-in IndiumTin-Oxide-Free Transparent Electrode )
Heng-Yang Xiang,†,‡ Yan-Qing Li,*,†,‡ Lei Zhou,†,‡ Hao-Jun Xie,†,‡ Chi Li,†,‡ Qing-Dong Ou,†,‡ Lin-Sen Chen,‡,§ Chun-Sing Lee, Shuit-Tong Lee,†,‡ and Jian-Xin Tang*,†,‡ †
)
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, and ‡Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China, §College of Physics Optoelectronics and Energy, Soochow University, Suzhou 215006, China, and Center of Super-Diamond and Advanced Films, Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
ABSTRACT Enhancing light outcoupling in flexible organic light-emitting diodes (FOLEDs) is an
important task for increasing their efficiencies for display and lighting applications. Here, a strategy for an angularly and spectrally independent boost in light outcoupling of FOLEDs is demonstrated by using plastic substrates with a low refractive index, consisting of a bioinspired optical coupling layer and a transparent conductive electrode composed of a silver network. The good transmittance to full-color emission (>94% over the whole visible wavelength range), ultralow sheet resistance to carrier injection (94% over the whole visible wavelength range), ultralow sheet resistance to carrier injection (
