Cited 2 time in webofscience Cited 2 time in scopus

Stress Release Effect of Micro-hole Arrays for Flexible Electrodes and Thin Film Transistors

Title
Stress Release Effect of Micro-hole Arrays for Flexible Electrodes and Thin Film Transistors
Authors
Lee, Gwang JunHeo, Su JinLee, SeungchulYang, Jae HoonJun, Byoung OkKim, Hyun SikJang, Jae Eun
DGIST Authors
Jang, Jae Eun
Issue Date
2020-04
Citation
ACS Applied Materials and Interfaces, 12(16), 19226-19234
Type
Article
Article Type
Article
Author Keywords
flexible electrodeflexible thin film transistormicro-hole arraysbendingfolding
Keywords
SURFACE-TREATMENTTRANSPARENTPERFORMANCEFABRICATIONPOLYIMIDECIRCUITSDISPLAYSADHESIONTFTS
ISSN
1944-8244
Abstract
The effects of micro-hole arrays in the thin metal films were studied as a method to release bending stress in flexible electrodes and flexible thin film transistors (TFTs). Interest in flexible electronics is increasing, and many approaches have been suggested to solve the issue of the electrical failure of electrodes or electrical components such as TFTs after repeated bending. Here, we demonstrate a micro-hole array structure as a common solution to release bending stress. Although micro-size cracks were generated and propagated from the hole edges, the cracks stopped within a certain range when enough stress was released. Moreover, since the crack sites were predictable and controllable, a fatal electrical breakdown in a conductive layer such as a metal electrode or the semiconducting junction of a TFT can be prevented by specifically arranging the hole arrays. Thin film layers fabricated without holes suffered an electrical breakdown due to random crack propagation during bending tests. Aluminum thin film electrodes prepared with arrays of 3 μm diameter holes and 25% hole area showed excellent durability after 300,000 bending cycles. The change in resistance was below 3%. The electrical characteristics of an a-IGZO TFT with the micro-hole structure were almost equivalent to a standard a-IGZO TFT. After 10,000 bending cycles, ION and the ratio of ION/IOFF remained >107 A and ∼107, respectively. Since the effective hole diameter is micrometer in size, fabrication does not require additional process steps or expensive process equipment. Therefore, the approach can be an important way to enhance the reliability of various electrical devices in flexible and wearable applications.
URI
http://hdl.handle.net/20.500.11750/11879
DOI
10.1021/acsami.0c02362
Publisher
American Chemical Society
Related Researcher
  • Author Jang, Jae Eun Advanced Electronic Devices Research Group(AEDRG) - Jang Lab.
  • Research Interests Nanoelectroinc device; 생체 신호 센싱 시스템 및 생체 모방 디바이스; 나노 통신 디바이스
Files:
There are no files associated with this item.
Collection:
Department of Information and Communication EngineeringAdvanced Electronic Devices Research Group(AEDRG) - Jang Lab.1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE