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Effect of Laser-Induced Direct Micropatterning on Polymer Optoelectronic Devices

Authors
Yun, ChanghunHan, Joo WonKang, Moon HeeKim, Yong HyunKim, BongjunYoo, Seunghyup
Issue Date
Dec-2019
Publisher
AMER CHEMICAL SOC
Keywords
laser patterning; micropatterning; optoelectronic device; polymer device; light-emitting diode; write-once-read-many (WORM) memory
Citation
ACS APPLIED MATERIALS & INTERFACES, v.11, no.50, pp 47143 - 47152
Pages
10
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
11
Number
50
Start Page
47143
End Page
47152
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/2693
DOI
10.1021/acsami.9b16352
ISSN
1944-8244
1944-8252
Abstract
Solution-processed polymer devices have been studied as a low-cost alternative to the conventional vacuum-processed organic devices. However, forming a specific pattern on polymer semiconductor films without costly lithography is still challenging. Herein, we report a low-cost direct patterning method for polymer optoelectronic devices, which can successfully engrave designated patterns on the polymer semiconductor layer regardless of its size and even after device encapsulation. Irradiation of a 100 ns pulse laser forms high-resolution patterns on devices such as polymer light-emitting diodes and polymer memory devices. The biggest advantage of the proposed patterning method is that it does not produce any physical damage in the device, such as leakage current or degraded light-emitting efficiency. Analysis confirms that the laser-induced heat alters the solid or crystal structure of the polymer semiconducting layers so that the designated areas of the polymer devices can be selectively and deliberately deactivated. We demonstrate the usability of the developed laser-induced direct-patterning method on the polymer devices by engraving a digital image onto "ON-state" light-emitting devices and by generating multiple states onto a 4 x 4 matrix polymer nonvolatile memory.
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