On the examination of temperature-dependent possible current-conduction mechanisms of Au/(nanocarbon-PVP)/n-Si Schottky barrier diodes in wide range of voltage

Abstract

Au/(nanocarbon-PVP)/n-Si SDs were fabricated and their current-conduction mechanisms (CCMs) have been examined in elaborative by utilizing current-voltage (I-V) characteristics in temperature range of 60-340K at (±3V) ranges. The values of ideality factor (n) and zero-bias barrier height (ΦBo) determined from the linear-part of semilogarithmic forward bias IF-VF properties based on Thermionic-Emission (TE) theory revealed that decrease in ΦBo and increase in n with deccreasing temperature. Additionally, Richardson constant (A*) value was found several orders lower than its theoretical value. The values of ΦBo and n changed from 0.173 eV to 0.837 eV and 6.60 to 2.85 with increasing temperature from 60 K to 340 K. This positive temperature-coefficient (α) of ΦBo is inagreement with the bandgap of semiconductor or barrier height (BH) for the ideal diode. The calculated higher value of n at low temperatures was attributed to the inhomogeneities of BH rather than the interlayer, surface-states (Nss), and imageforce lowering. With lowing temperatures, CCMs may be governed by tunneling over the lower barriers, via Nss, and generation recombination (GR), as well as TE and hence a complete description of CCM and understanding of the formation BH, remain a compelling problem. Nss-(Ec-Ess) profile was also obtained from IF-VF data for each temperature.

The Double Gaussian Distribution of Inhomogeneous Barrier Heights in Au/NAMA/n-Si Schottky Diodes

“…30 The ideality factor and barrier height values of Schottky diodes with organic interfacial layer prepared by means of n-Si semiconductor in literature were introduced in Table II. 7,[30][31][32][33] The barrier inhomogeneity in a diode form from dispersion of high and low barrier height local patches. 26 These patches have a nanoscale dimension.…”

Termal Buharlaştırma Yöntemiyle Hazırlanan Al/TiO2/p-Si Schottky Diyotun Elektriksel Özelliklerinin Sıcaklık ve Aydınlanma Şiddetine Bağlı İncelenmesi

“…Burada e efektif engel yüksekliği diğer parametreler literatürde belirtilmiştir [34][35][36][37]. Eşitlik 5a.-5d.…”