Ag nanowire electrode with patterned dry film photoresist insulator for flexible organic light-emitting diode with various designs. (15th December 2018)

• Record Type: Journal Article
• Authors: Kim, Sunho; Hwang, Byungil
• Is Part Of: Materials & design. Volume 160(2018)
• Page Start: 572
• Page End: 577
• Publication Date: 2018-12-15
• Subjects: Dry film photoresist -- Silver nanowire -- Insulator -- Electrode -- Paper -- Organic light-emitting diode; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2018.09.051
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: In this study, the utilization of a dry film photoresist (DFR) was explored for fabricating a patterned insulating layer in Ag nanowire (AgNW) bottom electrodes with various designs for flexible organic light-emitting diodes (OLEDs). With a single hot-pressing step, a pre-patterned DFR insulator was attached onto the AgNW electrodes, thus forming insulated electrodes in desired patterns. In the same hot-pressing step, AgNWs were also embedded into poly(methyl methacrylate), which sufficiently reduced the root mean square (RMS) roughness (~5 nm) for use in OLED lighting. Using DFR, AgNW electrodes with various shapes were fabricated to realize shaped flexible OLED lighting. The performance of OLED lighting employing the AgNW/patterned-DFR insulator electrode was comparable to that of indium‑tin-oxide-based OLED lighting. Further, the DFR insulator was utilized as a planarization layer in a paper-based OLED lighting, which operated well with a turn-on voltage of 3.5 V and maximum luminance of 157 cd/m 2 at 7.5 V. Graphical abstract: Highlights: Ag nanowire flexible transparent electrodes with root mean square below 5 nm were fabricated by a single hot pressing process By using pre-patterned dry film photoresist, shaped Ag nanowire electrodes were fabricated in the same hot pressing process Flexible organic light-emitting diode lightings with various designs were realized with the fabricated electrodes Paper-based organic light-emitting diode lighting was realized using a dry film photoresist planarization layer