Spreading resistance modeling for rapid extraction of contact resistivity with a four-point probe

2021-09-15
Turkay, Deniz
Tsoi, Konstantin
Donercark, Ergi
Turan, Raşit
Yerci, Selçuk
Extraction of contact resistivity (ρc) with the four-point probe (4PP) method requires considerably fewer fabrication and measurement steps compared to conventional alternatives (e.g. the transfer length method, TLM). Yet, the method is rarely used, mainly due to the requirement of 3D simulations used in the data fitting procedure. Moreover, a work analyzing the details of the method, which can provide a quantitative guideline to the users, is lacking in the literature. In this work, we show that the 3D simulations can be replaced with a spreading resistance model (SRM) implemented in a numerical calculation platform (e.g. MATLAB). Using the SRM, we achieve drastically short calculation durations (<1 s) compared to durations of 3D simulations based on the finite element method. We show that the resolution and reliability of the extracted ρc depends critically on geometrical and electrical parameters of the system, such as the probe tip spacing and sheet resistances of the layers. We also present an alternative measurement procedure that is fully based on 4PP measurements of only one substrate, which eliminates the need for an eddy-current measurement or an additional set of dedicated samples. We demonstrate the viability of the 4PP method in experiments by comparing the results with those obtained by the TLM, for ρc between 5 × 10−3 to 1 × 100 Ω cm2. Lastly, we provide a free software that can execute the calculations discussed herein.
Solar Energy Materials and Solar Cells

Suggestions

Zero average index design via perturbation of hexagonal photonic crystal lattice
Moradi, Shahram; GÖVDELİ, ALPEREN; Kocaman, Serdar (2017-11-01)
We study the effect of one-dimensional lattice compression on photoriic band diagram and apply it to form a superlattice in order to obtain zero-Ti gap. Modulated hexagonal lattice has the ability to provide both positive and negative effective refractive indices. We analyze the dispersion characteristics in case the positions of holes in the lattice are varied in the orthogonal direction of applied light direction. We then compare modified structures with the conventional lattice and study the influence of...
Flexible waveguides with amorphous photonic materials
Sarihan, Murat Can; Yilmaz, Yildirim Batuhan; Erdil, Mertcan; Aras, Mehmet Sirin; Yanik, Cenk; Wong, Chee Wei; Kocaman, Serdar (2019-01-01)
Amorphous photonic materials offer an alternative to photonic crystals as a building block for photonic integrated circuits due to their shared short-range order. By using the inherent disorder of amorphous photonic materials, it is possible to design flexible-shaped waveguides that are free from restrictions of photonic crystals at various symmetry axes. Effects of disorder on photonic crystal waveguide boundaries have examined before, and it is shown that flexible waveguides with high transmission are pos...
Yielding of two-layer shrink-fitted composite tubes subject to radial pressure
Eraslan, Ahmet Nedim (Springer Science and Business Media LLC, 2005-12-01)
Yielding of two-layer shrink-fitted composite tubes with axially constrained ends subject to either internal or external pressure is investigated in detail. In the framework of small deformations, a state of plane strain and von Mises yield criterion, analytical expressions are obtained for critical values of the pressure leading to plastic flow. It is shown that, depending on material properties and tube dimensions, different modes of plastic deformation may occur. Yielding may commence at the inner tube o...
NEMATIC-SMECTIC A TRICRITICAL PHASE-TRANSITION IN BINARY MIXTURE OF LIQUID-CRYSTALS
Yurtseven, Hasan Hamit (1992-10-01)
The nematic-smectic A tricritical phase transition has been studied in binary mixtures of liquid crystals. By making the analogy between the "quasi-binary" fluid mixture and binary mixture of liquid crystals, we adapt the thermodynamic model for fluid mixtures due to Griffiths to the case of mixtures of liquid crystals.
Simultaneous dissolution and uptake of nutrients in microalgal treatment of the secondarily treated digestate
Ulgudur, Nilufer; Bayramoğlu, Tuba Hande; Demirer, Goksel N. (Elsevier BV, 2019-11-01)
Anaerobic digestion processes result in large volumes of digestates which still require the development of elaborate and viable management options to improve the sustainability of these processes. Coupling of secondary anaerobic treatment with a microalgal nutrient removal process may serve benefits such as residual biogas and associated greenhouse gas capture from the digestate content, microalgal biomass build-up and its further valorization. This study investigated the applicability a microalgal nutrient...
Citation Formats
D. Turkay, K. Tsoi, E. Donercark, R. Turan, and S. Yerci, “Spreading resistance modeling for rapid extraction of contact resistivity with a four-point probe,” Solar Energy Materials and Solar Cells, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85109690302&origin=inward.