| Yazarlar (1) |
Doç. Dr. Abdullah AKKAYA
Kırşehir Ahi Evran Üniversitesi, Türkiye |
| Özet |
| We report the electrical properties of the Au/n–GaAs devices with and without thin organic interface layer. Methylene blue(MB) is a heterocyclic aromatic chemical compound with the molecular formula C16H18N3SCl. The MB layer was formedby spin coating technique on chemically cleaned gallium arsenide (GaAs) substrate. The current–voltage (I–V) characteristicsof the Au/MB/n–GaAs metal-insulator-semiconductor (MIS) and Au/n–GaAs metal-semiconductor (MS) devices have beeninvestigated at room temperature. The MS and MIS devices I–V characteristics showed a good rectification, and they wereanalyzed based on the thermionic emission (TE) theory. The ideality factor (n) and the barrier height (${\Phi b}^{(IV)}$) from the I–Vcharacteristics was determined as 1.131±0.006 and 0.782±0.005 eV for MS device and 1.336±0.057 and 0.950±0.008 eV forMIS device, respectively. A Cheung’s method and modified Norde's function has been used to extract the parameters includingthe ($\Phi_b$) and the series resistance ($\R_S$).Distributions of the interface state density ($D_{it}$) of the MS and MIS devices were derived from I–V measurements. Our resultsindicate that the Au/MB/n–GaAs device had lower interface state density values than the Au/GaAs device. Also non-saturatedreverse bias current was investigated by the using a Pole-Frenkel emission model. Furthermore, the optical and morphologicalproperties of MB layer were investigated by the Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) andUV-vis Spectrophotometer (UV-vis). |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | Ulusal alan endekslerinde (TR Dizin, ULAKBİM) yayımlanan tam makale |
| Dergi Adı | Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering |
| Dergi ISSN | 1302-3160 |
| Dergi Tarandığı Indeksler | TR DİZİN |
| Makale Dili | Türkçe |
| Basım Tarihi | 12-2018 |
| Sayı | 3 |
| Sayfalar | 756 / 767 |
| Doi Numarası | 10.18038/aubtda.357685 |
| Makale Linki | http://dx.doi.org/10.18038/aubtda.357685 |
| Atıf Sayıları | |
| Google Scholar | 5 |
