Cristin-resultat-ID: 1834916
Sist endret: 20. september 2022, 08:43
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Electrochemically driven degradation of chemical solution deposited ferroelectric thin-films in humid ambient

Bidragsytere:
  • Runar Plunnecke Dahl-Hansen
  • Jonathan Marc Polfus
  • Einar Vøllestad
  • Betul Akkopru-Akgun
  • Lyndsey Denis
  • Kathleen Coleman
  • mfl.

Tidsskrift

Journal of Applied Physics
ISSN 0021-8979
e-ISSN 1089-7550
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2020
Volum: 127
Artikkelnummer: 244101
Open Access

Importkilder

Scopus-ID: 2-s2.0-85087548929

Beskrivelse Beskrivelse

Tittel

Electrochemically driven degradation of chemical solution deposited ferroelectric thin-films in humid ambient

Sammendrag

The ambient humidity significantly accelerates the degradation of lead zirconate titanate (PZT) films in microelectromechanical systems; the cause of such degradation is under debate. Here, it is shown that the degradation of chemical solution derived PZT thin-films in humid conditions is driven by the system's electrochemical activity toward water electrolysis. The layer stacks with Pt-based electrodes exhibited a faster degradation rate owing to their higher electrocatalytic activity compared to Au. A degradation model is proposed based on the electrolysis of liquid or gaseous H2O, involving the evolution of oxygen and hydrogen gas at the top and bottom electrodes. Degradation proceeds above the threshold voltage for a given electrode system and is driven by the evolution and pressure build-up of gaseous species at the PZT/electrode interfaces. The pressure build-up causes film cracking, delamination of the film and electrodes, electrothermal breakdown events, and eventually time-dependent dielectric breakdown. Significantly larger post-breakdown crater sizes in humid than in dry conditions suggests that larger cracks through which dielectric breakdown through humidified air can occur. Overall, these effects are shown to cause sample failure up to six orders of magnitude of time earlier than for operation in dry conditions. Thus, in order to improve the resilience of thin-film systems in humid conditions, it is imperative to protect the electrochemically active electrode components of the device.

Bidragsytere

Runar Plunnecke Dahl-Hansen

  • Tilknyttet:
    Forfatter
    ved Bærekraftig energiteknologi ved SINTEF AS
  • Tilknyttet:
    Forfatter
    ved SINTEF Digital ved SINTEF AS
  • Tilknyttet:
    Forfatter
    ved Institutt for elektroniske systemer ved Norges teknisk-naturvitenskapelige universitet

Jonathan Polfus

Bidragsyterens navn vises på dette resultatet som Jonathan Marc Polfus
  • Tilknyttet:
    Forfatter
    ved Bærekraftig energiteknologi ved SINTEF AS

Einar Vøllestad

  • Tilknyttet:
    Forfatter
    ved Bærekraftig energiteknologi ved SINTEF AS

Betul Akkopru-Akgun

  • Tilknyttet:
    Forfatter
    ved Pennsylvania State University

Lyndsey Denis

  • Tilknyttet:
    Forfatter
    ved Pennsylvania State University
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