Electroless deposition of palladium films on gallium nitride for Schottky diodes

This work presents electroless deposition of palladium films onto gallium nitride from aqueous palladium dichloride using sodium L-ascorbate as the reducing agent in an acidic bath. Profilometry, four-point probe measurements, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy were used to measure film thickness, sheet resistance, resistivity, morphology, and composition. The resistivity of Pd was 1–3 × 10–5 Ω cm. Schottky diodes were produced from plated films, and the barrier heights and ideality factors were determined from current–voltage measurements. Average barrier heights were 1.13–1.26 eV, with ideality factors from 1.02 to 1.05, depending on the gallium nitride epilayer and substrate. A method for depositing palladium-gallium alloy films is also presented onto gold surfaces from palladium dichloride and gallium (III) sulfate using sodium hypophosphite as the reducing agent; however, palladium-gallium alloys were not readily deposited on gallium nitride.

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10854-022-07907-5

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Work Title Electroless deposition of palladium films on gallium nitride for Schottky diodes
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Open Access
Creators
  1. Steven P. Dail
  2. Alex Molina
  3. Ian Campbell
  4. Asad J. Mughal
  5. Suzanne Mohney
Keyword
  1. electroless plating
  2. palladium
  3. gallium nitride
  4. Schottky diodes
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Springer
Publication Date February 18, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1007/s10854-022-07907-5
Deposited August 11, 2022

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  • Updated
  • Added Creator Steven P. Dail
  • Added Creator Alex Molina
  • Added Creator Ian Campbell
  • Added Creator Asad J. Mughal
  • Added Creator Suzanne Mohney
  • Added Accepted_version_of_Electroless_Deposition_of_Palladium_Films_on_Gallium_Nitride_for_Schottky_Diodes.pdf
  • Updated License Show Changes
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    • https://rightsstatements.org/page/InC/1.0/
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  • Updated Work Title, Keyword Show Changes
    Work Title
    • Electroless deposition of palladium films on gallium nitride for Schottky diodes
    • ! Electroless deposition of palladium films on gallium nitride for Schottky diodes
    Keyword
    • electroless plating, palladium, gallium nitride, Schottky diodes
  • Updated Work Title Show Changes
    Work Title
    • ! Electroless deposition of palladium films on gallium nitride for Schottky diodes
    • Electroless deposition of palladium films on gallium nitride for Schottky diodes