The influence of the physicochemical processes on the electrical response of Al/p-Si structure with etched surface
Yükleniyor...
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this paper, the electrochemical etching process is used for surface modifcation of the p-Si wafer, named as porous silicon (PS), in the metal–semiconductor (MS) type Schottky diode (SD) with a structure of Al/p-Si. Five regions of PS wafer with diferent etching rates are selected for comparison of them which are called P2, P3, P4, and P5 (P1 is the reference area without porosity). The morphological, structural, and electrical properties of the PS used in the MS-type SD are investigated using feld-emission scanning electron microscope (FE-SEM) images, energy dispersive X-ray (EDX) analysis, and current–voltage (I–V) characteristics, respectively. The FE-SEM images show a meaningful efect on the porosity. The EDX spectrum demonstrates the importance of the chemical efects in addition to the physical changes in the porosity process of the p-Si wafer. The reverse-saturation current (I0), ideality factor (n), barrier height at zero-bias (?B0), and series/shunt electrical resistances are also computed and compared. Some of these parameters (n, Rs, BH) are determined using diferent methods, namely Thermionic emission (TE), Cheung functions, and modifed Norde, and they exhibit strong agreement with each other. The energy-dependent profles of surface states (Nss) are estimated from the I–V data by considering the voltage dependence of ?B (V) and n(V). All the experimental fndings indicate that the etching process of the p-Si wafer signifcantly infuences the electrical performance of the Al/p-Si Schottky diode by increasing the extent of etching.
Açıklama
Anahtar Kelimeler
Shottky diode (SD); Porous silicon surface; Electric properties; Energy dependent profle of surface states
Kaynak
Applied Physics A: Materials Science and Processing
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
130
Sayı
4
