Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer

Chi Hsiang Hsu, Sheng Yi Chen, Wei Cheng Chen, Ching Hong Chang, Chun Yen Chen, Jung Hui Tsai, Wen-Chau Liu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A new and simple Al/aluminum-doped zinc oxide (AZO) composite structure is proposed to act as a transparent conductive layer (TCL) for GaN-based LEDs. The Al/AZO composite layers effectively improve the current spreading performance, compared with an AZO TCL. Experimentally, the specific contact resistance of the studied Al/AZO LED is reduced by about 27.6%, compared with an AZO LED. In addition, under an operating current of 20 mA, the forward voltage and light output power (LOP) of the studied Al/AZO LED are decreased by 0.15 V and increased by 19.5%, respectively. Uniform and enhanced intensities are also found in light emission mapping images of the studied Al/AZO LED. Consequently, based on benefits including simple structure and improved electrical and optical properties, the studied Al/AZO TCL is suitable for GaN-based LED applications.

Original languageEnglish
Article number7982960
Pages (from-to)3678-3682
Number of pages5
JournalIEEE Transactions on Electron Devices
Volume64
Issue number9
DOIs
Publication statusPublished - 2017 Sep 1

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Zinc Oxide
Zinc oxide
Aluminum
Light emitting diodes
Composite materials
Light emission
Contact resistance
Composite structures
Electric properties
Optical properties
Electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Hsu, C. H., Chen, S. Y., Chen, W. C., Chang, C. H., Chen, C. Y., Tsai, J. H., & Liu, W-C. (2017). Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer. IEEE Transactions on Electron Devices, 64(9), 3678-3682. [7982960]. https://doi.org/10.1109/TED.2017.2724599
Hsu, Chi Hsiang ; Chen, Sheng Yi ; Chen, Wei Cheng ; Chang, Ching Hong ; Chen, Chun Yen ; Tsai, Jung Hui ; Liu, Wen-Chau. / Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer. In: IEEE Transactions on Electron Devices. 2017 ; Vol. 64, No. 9. pp. 3678-3682.
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Hsu, CH, Chen, SY, Chen, WC, Chang, CH, Chen, CY, Tsai, JH & Liu, W-C 2017, 'Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer', IEEE Transactions on Electron Devices, vol. 64, no. 9, 7982960, pp. 3678-3682. https://doi.org/10.1109/TED.2017.2724599

Study of a GaN-Based LED with an Al/AZO Composite Transparent Conductive Layer. / Hsu, Chi Hsiang; Chen, Sheng Yi; Chen, Wei Cheng; Chang, Ching Hong; Chen, Chun Yen; Tsai, Jung Hui; Liu, Wen-Chau.

In: IEEE Transactions on Electron Devices, Vol. 64, No. 9, 7982960, 01.09.2017, p. 3678-3682.

Research output: Contribution to journalArticle

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AU - Tsai, Jung Hui

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