On the barrier inhomogeneities of polyaniline/p-Si/Al structure at low temperature
Özet
The current-voltage (I-VI) characteristics of Au/polyaniline(PANI)/p-Si/Al structures were determined at various temperatures in the range of 90-300 K. The evaluation of the experimental I-V data reveals a decrease of the zero-bias barrier height (BH) and an increase of the ideality factor (n) with decreasing temperature. It was shown that the occurrence of a Gaussian distribution of then BHs is responsible for the decrease of the apparent BH, increase of the ideality factor n due to barrier height imhomogeneities that prevail at the interface. A Phi(b0) versus 1/T plot has been drawn for evidence of the Gaussian distribution of the barrier height, and Phi(b0) = 0.878 eV and sigma(0) = 0.0943 V for the mean barrier height and zero-bias standard deviation, respectively, have been obtained from this plot. Thus, a modified In(I-0/T-2) - q(2)sigma(0)(2)/2k(2) T-2 versus 1/T plot gives (Phi) over bar (b0) and A* as 0.885 eV and A* = 55.80 A/K-2 cm(2), respectively. Hence, it can be concluded that Au/PANI/p-Si/Al structure has a good rectifying contact and the temperature dependence of I-V characteristics of the rectifying contact on p-Si successfully have been explained on the basis of TE mechanism with Gaussian distribution of the barrier heights. (c) 2004 Elsevier B.V. All rights reserved.
Anahtar kelimeler
Atıf için künye
Aydoğan, Ş., Sağlam, M., & TURUT, A. (2005). On the barrier inhomogeneities of polyaniline/p-Si/Al structure at low temperature. APPLIED SURFACE SCIENCE, 250, 43–49. https://doi.org/10.1016/j.apsusc.2004.12.020
BibTeX
@article{aydogan2005-64208,
author = {Aydoğan, Şakir and Sağlam, Mustafa and TURUT, Abdulmecit},
title = {On the barrier inhomogeneities of polyaniline/p-Si/Al structure at low temperature},
journal = {APPLIED SURFACE SCIENCE},
year = {2005},
volume = {250},
pages = {43--49},
issn = {0169-4332},
doi = {10.1016/j.apsusc.2004.12.020},
url = {https://akademik.atauni.edu.tr/yayinlar/64208-on-the-barrier-inhomogeneities-of-polyanilinep-sial-structure-at-low-temperature}
}