Observation of space-charge-limited current in AlGaN/GaN ultraviolet light-emitting diodes
SCIE
SCOPUS
- Title
- Observation of space-charge-limited current in AlGaN/GaN ultraviolet light-emitting diodes
- Authors
- Park, Jun Hyuk; Kim, Jong Kyu; Cho, Jaehee
- Date Issued
- 2018-03
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- AlGaN-containing ultraviolet light-emitting diodes (UV LEDs) emitting at 285 nm show abnormal diode characteristics below the sub-threshold input voltage region, indicating the existence of a space-charge-limited (SCL) current. Distinct transitions from Ohmic to SCL and further diode currents are observed in UV LEDs, unlike GaInN-based LEDs. Under varied temperatures, the transition voltages from Ohmic to SCL currents and the exponents of the power functions in the current-voltage dependency are influenced by the deactivated trap density in the AlGaN film, indicating that the charge injection and compensation limit for the current within the films in the low-voltage regimes for nitride-based UV LEDs. (C) 2017 Elsevier B.V. All rights reserved.
- Keywords
- EFFICIENCY; EMISSION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50904
- DOI
- 10.1016/j.matlet.2017.12.011
- ISSN
- 0167-577X
- Article Type
- Article
- Citation
- MATERIALS LETTERS, vol. 214, page. 217 - 219, 2018-03
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- There are no files associated with this item.
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