Outcoupling-Enhanced Flexible Organic Light-Emitting Diodes on Ameliorated Plastic Substrate with Built-in Indium鈥揟in-Oxide-Free Transparent Electrode

详细信息    查看全文

• 作者：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 ; Jian-Xin Tang
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：July 28, 2015
• 年：2015
• 卷：9
• 期：7
• 页码：7553-7562
• 全文大小：724K
• ISSN：1936-086X

文摘

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 (<5 惟 sq^鈥?), and high tolerance to mechanical bending of the ameliorated plastic substrates synergistically optimize the device performance of FOLEDs. The maximum power efficiencies reach 47, 93, 56, and 52 lm W^鈥? for red, green, blue, and white emissions, which are competitive with similarly structured OLEDs fabricated on traditional indium鈥搕in-oxide (ITO) glass. This paradigm for light outcoupling enhancement in ITO-free FOLEDs offers additional features and design freedoms for highly efficient flexible optoelectronics in large-scale and low-cost manufacturing without the need for a high-refractive-index plastic substrate.