Stable electrical performance of AlGaInP-based red micro-light emitting diode by controlling interfacial morphologies of metal contacts
- Authors
- Lee, Da-Hoon; Seong, Tae-Yeon; Amano, Hiroshi
- Issue Date
- 15-8월-2021
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- AlGaInP-based red micro-LED; AuGe; Ni; Au; Pd; Ge; Unstable electrical property; Interfacial morphology
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.872
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 872
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/127660
- DOI
- 10.1016/j.jallcom.2021.159629
- ISSN
- 0925-8388
- Abstract
- The stable electrical performance of micro-light-emitting diodes (micro-LEDs) is critical to display application. We investigated the effect of the interface morphologies of contacts to n-AlInP on the electrical stability of AlGaInP-based red micro-LEDs. Regardless of chip sizes (100 pm or 10 pm-size), micro-LEDs with Pd/Ge contacts gave lower and stable forward voltages than those with AuGe/Ni/Au contacts. When annealed at 450 ?C, the AuGe/Ni/Au contact underwent seriously inhomogeneous interfacial reactions, resulting in a large variation of interfacial morphologies across the whole contact/AlInP interface. However, the Pd/Ge contact exhibited similar morphologies across the whole interface when annealed. Further, when operated at 800 A/cm2, micro-LEDs with the Pd/Ge contacts underwent less electrical degradation than the ones with the AuGe/Ni/Au contacts. Based on the electrical and scanning transmission electron microscope (STEM) results, the unstable electrical behavior of red micro-LEDs with the AuGe/Ni/Au contact is discussed. ? 2021 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholar.korea.ac.kr/handle/2021.sw.korea/127660)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.