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2. Integration of epitaxial LiNbO3 thin films with silicon technology

Author

Bartasyte, Ausrine, primary, Oliveri, Stefania, additional, Boujnah, Sondes, additional, Margueron, Samuel, additional, Bachelet, Romain, additional, Saint-Girons, Guillaume, additional, Albertini, David, additional, Gautier, Brice, additional, Boulet, Pascal, additional, Nuta, Ioana, additional, Blanquet, Elisabeth, additional, Astié, Vincent, additional, and Decams, Jean-Manuel, additional

Published
2024
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3. Integration of epitaxial LiNbO3 thin films with silicon technology.

Author

Bartasyte, Ausrine, Oliveri, Stefania, Boujnah, Sondes, Margueron, Samuel, Bachelet, Romain, Saint-Girons, Guillaume, Albertini, David, Gautier, Brice, Boulet, Pascal, Nuta, Ioana, Blanquet, Elisabeth, Astié, Vincent, and Decams, Jean-Manuel

Subjects
PIEZOELECTRIC thin films, THIN films, SILICON films, MOLECULAR beam epitaxy, CHEMICAL stability, LIQUID films, NANOPOSITIONING systems
Abstract

Development of bulk acoustic wave filters with ultra-wide pass bands and operating at high frequencies for 5th and 6th generation telecommunication applications and micro-scale actuators, energy harvesters and sensors requires lead-free piezoelectric thin films with high electromechanical coupling and compatible with Si technology. In this paper, the epitaxial growth of 36°Y-X and 30°X-Y LiNbO3 films by direct liquid injection chemical vapour deposition on Si substrates by using epitaxial SrTiO3 layers, grown by molecular beam epitaxy, has been demonstrated. The stability of the interfaces and chemical interactions between SrTiO3, LiNbO3 and Si were studied experimentally and by thermodynamical calculations. The experimental conditions for pure 36°Y-X orientation growth have been optimized. The piezoelectricity of epitaxial 36°Y-X LiNbO3/SrTiO3/Si films was confirmed by means of piezoelectric force microscopy measurements and the ferroelectric domain inversion was attained at 85 kV.cm−1 as expected for the nearly stoichiometric LiNbO3. According to the theoretical calculations, 36°Y-X LiNbO3 films on Si could offer an electromechanical coupling of 24.4% for thickness extension excitation of bulk acoustic waves and a comparable figure of merit of actuators and vibrational energy harvesters to that of standard PbZr1− x Ti x O3 films. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Material strategies to enhance the performance of piezoelectric energy harvesters based on lead-free materials

Author

Bartasyte, Ausrine, primary, Clementi, Giacomo, additional, Micard, Quentin, additional, Labbaveettil, Ishamol, additional, Moreira, Arthur Sousa Lopes, additional, Boujnah, Sondes, additional, Ouhabaz, Merieme, additional, Verma, Anjenya, additional, Ichangi, Arun, additional, Malandrino, Graziella, additional, Mathur, Sanjay, additional, Dulmet, Bernard, additional, and Margueron, Samuel, additional

Published
2023
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