Abstract
In this work, we have reported the interface characterization of rf sputtered ZnO/HfO2 in thin film transistor structure by dc current-voltage and admittance spectroscopy. The interface state density (Dit) of 1013 eV−1cm−2 was extracted from the Gp/ω vs ω plot was comparable to value obtained from the subthreshold behavior. The grain boundary trap density (NGB) of 9.12×1012 cm−2 was estimated using Levinson’s model. The interface state density distribution below the conduction band edge shows a decreasing trend with energy below the conduction band edge. We also studied the impact of introducing MgO interfacial layer between ZnO and HfO2 interface as an approach towards decreasing the interface state density.
Similar content being viewed by others
References
M. Stutzmann, I.D. Sharp, J.A. Garrido, Appl. Phys. Lett. 99, 033503 (2011).
S Chang,Y. Song, S. Lee, S. Y. Lee, and B. K. Ju, Appl. Phys. Lett. 92, 192104 (2008)
A. Y. Kang, P. M. Lenahan, and J. F. Conley Jr., Appl. Phys. Lett. 83, 3407 (2003)
W.-Y. Chen, J.-S. Jeng, J.-S. Chen, ECS Solid State Lett. 1 (5) (2012)
J. J. Siddiqui, J. D. Phillips, K. Leedy, and B. Bayraktaroglu, IEEE Electron Device Lett. 32,12 (2011)
P. F. Carcia, R. S. McLean, and M. H. Reilly, Appl. Phys. Lett. 88, 123509 (2006)
R. Martins, P. Barquinha, I. Ferreira, L. Pereira, G. Gonçalves, E. Fortunato, J. Appl. Phys. 101, 044505 (2007)
J. Levinson, F. R. Shepherd, P. J. Scalnon, W. D. Westwod, G. Este, and M. Rider, J. Appl. Phys., 53, 1193 (1982)
E. H. Nicollian and A. Goetzberger, Microelectron. Reliab. 7, 164 (1968).
H. C. Lin, G. Brammertz, K. Martens, G. de Valicourt, L. Negre, W. E. Wang, W. Tsai, M. Meuris, and M. Heyns, Appl. Phys. Lett. 94, 153508 (2009).
G. Chicot, J. Pernot, J.L. Santailler, C. Chevalier, C. Granier, P. Ferret, A. Ribeaud, G. Feuillet and P. Muret, Phys. Status Solidi B, 251, 206 (2014)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Thapaliya, P., Lu, W. & Jha, R. Electrical Characteristics of RF Sputtered ZnO/HfO2 Interfaces in Transparent Thin Film Transistors. MRS Online Proceedings Library 1792, 545 (2015). https://doi.org/10.1557/opl.2015.648
Published:
DOI: https://doi.org/10.1557/opl.2015.648