用于柔性有机发光二极管的聚（乙烯醇缩丁醛）上随机纳米锥的光提取

Extraction of Light Using Random Nanocone on Poly(vinyl-butyral) for Flexible OLEDs.

作者信息

Lee Dong Jun, Yoon In Seon, Park Cheol Hwee, Choi Junhee, Park Young Wook, Ju Byeong-Kwon

机构信息

Display and Nanosystem Laboratory, Department of Electrical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.

School of Mechanical and ICT Convergence Engineering, SUN MOON University, Chungcheongnam-do, 31460, Republic of Korea.

出版信息

Sci Rep. 2019 Aug 23;9(1):12312. doi: 10.1038/s41598-019-48808-8.

DOI:10.1038/s41598-019-48808-8

PMID:31444381

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6707228/

Abstract

In this study, we designed a smooth, highly flexible, mechanically robust poly(vinyl-butyral) (PVB)/silver nanowire (AgNW) composite transparent conducting electrode (TCE) integrated with a random nanocone (RNC) to enhance the light extraction of flexible organic light-emitting diodes (OLEDs). The RNC was fabricated by reactive-ion etching (RIE) on AgNW embedded in PVB. As the etching time increased, the size of the RNC became larger. The sheet resistance and transmittance of PVB/AgNW with the RNC was 21.7 Ω/sq and ~87%, respectively. For the PVB/AgNW, the change in sheet resistance was only 2.6% when a 2,000-bend test was performed. The maximum external quantum efficiency was 28.3% when RNC 700 s was used as a green phosphorescent OLED. In addition, for current efficiency and power efficiency, RNC 700 s increased 1.4 times over RNC 0 s. RNC is free of viewing-angle-dependent color and brightness distortion. PVB/AgNW and RNC are practical ways to overcome the brittleness of conventional indium tin oxide and improve the efficiency of flexible OLEDs. Finally, this product is expected to be applied to various flexible optical devices.

摘要

在本研究中，我们设计了一种光滑、高度灵活且机械坚固的聚（乙烯醇缩丁醛）（PVB）/银纳米线（AgNW）复合透明导电电极（TCE），其集成了随机纳米锥（RNC），以提高柔性有机发光二极管（OLED）的光提取效率。通过对嵌入PVB中的AgNW进行反应离子蚀刻（RIE）来制备RNC。随着蚀刻时间的增加，RNC的尺寸变大。带有RNC的PVB/AgNW的方阻和透过率分别为21.7Ω/sq和约87%。对于PVB/AgNW，在进行2000次弯曲测试时，方阻的变化仅为2.6%。当使用RNC 700 s作为绿色磷光OLED时，最大外量子效率为28.3%。此外，对于电流效率和功率效率，RNC 700 s比RNC 0 s提高了1.4倍。RNC不存在视角依赖性颜色和亮度失真。PVB/AgNW和RNC是克服传统氧化铟锡脆性并提高柔性OLED效率的实用方法。最后，该产品有望应用于各种柔性光学器件。