dc.contributor.author | Yildirim, N. | |
dc.contributor.author | Dogan, H. | |
dc.contributor.author | Korkut, H. | |
dc.contributor.author | Turut, A. | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T10:14:01Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T10:14:01Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0217-9792 | |
dc.identifier.uri | https://dx.doi.org/10.1142/S0217979209053564 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/10034 | |
dc.description | WOS: 000272468100002 | en_US |
dc.description.abstract | We have prepared the sputtered Ni/n-GaAs Schottky diodes which consist of as deposited, and diodes annealed at 200 and 400 degrees C for 2 min. The effect of thermal annealing on the temperature-dependent current-voltage (I-V) characteristics of the diodes has been experimentally investigated. Their I-V characteristics have been measured in the temperature range of 60-320 K with steps of 20 K. It has been seen that the barrier height (BH) slightly increased from 0.84 (as-deposited sample) to 0.88 eV at 300 K when the contact has been annealed at 400 degrees C. The SBH increased where as the ideality factor decreased with increasing annealing temperature for each sample temperature. The I-V measurements showed a dependence of ideality factor n and BH on the measuring temperature that cannot be explained by the classical thermionic emission theory. The experimental data are consistent with the presence of an inhomogeneity of the SBHs. Therefore, the temperature dependent I-V characteristics of the diodes have been discussed in terms of the multi-Gaussian distribution model. The experimental data good have agree with the fitting curves over whole measurement temperature range indicating that the SBH inhomogeneity of our as-deposited and annealed Ni/n-GaAs SBDs can be well-described by a double-Gaussian distribution. The slope of the nT versus T plot for the samples has approached to unity with increasing annealing temperature and becomes parallel to that of the ideal Schottky contact behavior for the 400 degrees C annealed diode. Thus, it has been concluded that the thermal annealing process translates the metal-semiconductor contacts into thermally stable Schottky contacts. | en_US |
dc.description.sponsorship | Turkish Scientific and Technological Research Council of Turkey (TUBITAK) [105T487]; Atatrk University [BAP2006/51] | en_US |
dc.description.sponsorship | This work was supported by The Turkish Scientific and Technological Research Council of Turkey (TUBITAK) (Project No. 105T487) and Atatrk University (Project No. BAP2006/51). The authors wish to thank TUBITAK and Atatrk University. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | WORLD SCIENTIFIC PUBL CO PTE LTD | en_US |
dc.relation.isversionof | 10.1142/S0217979209053564 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Schottky barrier diodes | en_US |
dc.subject | thermionic emission | en_US |
dc.subject | barrier height inhomogeneity | en_US |
dc.subject | GaAs | en_US |
dc.subject | thermal annealing | en_US |
dc.title | DEPENDENCE OF CHARACTERISTIC DIODE PARAMETERS IN Ni/n-GaAs CONTACTS ON THERMAL ANNEALING AND SAMPLE TEMPERATURE | en_US |
dc.type | article | en_US |
dc.relation.journal | INTERNATIONAL JOURNAL OF MODERN PHYSICS B | en_US |
dc.contributor.department | [Yildirim, N.] Bingol Univ, Fac Sci & Arts, Dept Phys, Bingol, Turkey -- [Dogan, H.] Cumhuriyet Univ, Dept Elect & Elect Engn, Fac Engn, TR-58140 Sivas, Turkey -- [Korkut, H. -- Turut, A.] Ataturk Univ, Fac Sci, Dept Phys, TR-25240 Erzurum, Turkey | en_US |
dc.contributor.authorID | YILDIRIM, Nezir -- 0000-0002-1864-2269; YILDIRIM, Nezir -- 0000-0002-1864-2269 | en_US |
dc.identifier.volume | 23 | en_US |
dc.identifier.issue | 27 | en_US |
dc.identifier.endpage | 5249 | en_US |
dc.identifier.startpage | 5237 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |