Spreading Resistance Modeling for Contact Resistivity Extraction in Ohmic Multilayer Structures With Circular Electrodes

Date

2021-12-01

Author

Turkay, Deniz
Tsoi, Konstantin
Donercark, Ergi
Turan, Raşit
Yerci, Selçuk

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

136
views

0
downloads

Contacts featuring multiple layers of materials in combination with metal electrodes enabled record-high power conversion efficiencies for solar cells in recent years. Minimizing the contact resistivity in these multilayer structures is critical to achieve a high device performance and rapid characterization methods are crucial for the experimental analysis of this aspect. However, commonly used test methods and the associated mathematical formulations to extract contact resistivity are not designed for samples with multiple layers. In this work, we analyze formulations describing the resistance measured in ohmic multilayer test structures, which are used to fit and extract an unknown contact resistivity. We focus on a contacting scheme with circular electrodes, commonly named after Cox and Strack (CS), and analyze a material configuration consisting of a thick Si substrate fully coated with a thin conductive layer (CL). We demonstrate the applicability and accuracy of various spreading resistance models (SRMs) from the literature to calculate the measured resistance and compare the results with those obtained by the finite element method (FEM). Moreover, we present a new SRM with a closed-form expression for the measured resistance, which is computationally more efficient than the existing SRMs. Last, we demonstrate the applicability of this model in experiments with (n)c-Si/(i)a-Si:H/(n)a-Si:H/indium tin oxide (ITO) test structures.

Subject Keywords

Contact resistivity, ohmic contact, DISK ELECTRODE, EFFICIENCY, MICROSCOPY, INTERFACES, SLAB, COX

URI

https://hdl.handle.net/11511/94966

Journal

IEEE TRANSACTIONS ON ELECTRON DEVICES

DOI

https://doi.org/10.1109/ted.2021.3117187

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Efficient Light Trapping in Inverted Nanopyramid Thin Crystalline Silicon Membranes for Solar Cell Applications MAVROKEFALOS, Anastassios; HAN, Sang Eon; Yerci, Selçuk; Branham, Matthew S.; CHEN, Gang (2012-06-01) Thin-film crystalline silicon (c-Si) solar cells with light-trapping structures can enhance light absorption within the semiconductor absorber layer and reduce material usage. Here we demonstrate that an inverted nanopyramid light-trapping scheme for c-Si thin films, fabricated at wafer scale via a low-cost wet etching process, significantly enhances absorption within the c-Si layer. A broadband enhancement in absorptance that approaches the Yablo-novitch limit (Yablo-novitch, E. J. Opt. Soc. Am. 1987, 72, ...
MoOx/Ag/MoOx multilayers as hole transport transparent conductive electrodes for n-type crystalline silicon solar cells Akdemir, Ozan; Borra, Mona Zolfaghari; Nasser, Hisham; Turan, Raşit; Bek, Alpan (Wiley, 2020-03-25) Substitution of highly doped layers with conventional transparent conductive electrodes as carrier collecting and selective contacts in conventional crystalline silicon (c-Si) solar cell configurations is crucial in increasing affordability of solar cells by lowering material costs. In this study, oxide/metal/oxide (OMO) multilayers featuring molybdenum oxide (MoOx) and silver (Ag) thin films are developed by thermal evaporation technique, as dopant-free hole transport transparent conductive electrodes (HTT...
Broadband spectral splitting of white light via 2D diffractive optical elements Başay, Yalın; Yüce, Emre (The Scientific and Technological Research Council of Turkey, 2018-10-01) An effective way of increasing the efficiency of solar cells is to spectrally split sunlight into several frequencies and absorb each frequency using appropriate photovoltaic materials. In this study, we establish a method to show spectral splitting of broadband solar light via iteratively optimized diffractive optical elements. We develop an algorithm in order to calculate 2D holographic patterns that focus two different frequencies to designated positions.
Characterization and contact resistivity studies of ito thin films for use in silicon heterojunction solar cells Güler, Seçil; Erçelebi, A. Çiğdem.; Department of Physics (2020) Transparent conductive oxides (TCO) are widely used in optoelectronic devices such as flat panel displays and solar cells. Indium tin oxide, due to its wide optical bandgap and high transmittance in the visible spectrum, is commonly used for device applications such as anti-reflective coating, front TCO layer in silicon heterojunction solar cells. When ITO is used as TCO layer, the carrier transport mechanism through the junction is improved due to the decrease in the free carrier absorption. In this study,...
Polymer light emitting diodes and organic solar cells towards ito free devices and high efficiency devices using electrochemically synthesized polymers / Hızalan Özsoy, Gönül; Toppare, Levent Kamil; Department of Chemistry (2017) In this study, polymer based solar cells and polymer based light emitting diodes were constructed. In the third and fourth chapters of this study, effect of terminal units and effect of molecular weight on electroluminescence and photovoltaic properties were investigated. Triphenyl end capped polymer P1 based PLED shows luminance value of 10411cd/m2 at 8.5V whereas benzene end capped polymer P2 based PLED has the peak luminance value of 14583cd/m2 at 8V. P2 based photovoltaic devices exhibited superior perf...

Citation Formats

D. Turkay, K. Tsoi, E. Donercark, R. Turan, and S. Yerci, “Spreading Resistance Modeling for Contact Resistivity Extraction in Ohmic Multilayer Structures With Circular Electrodes,” IEEE TRANSACTIONS ON ELECTRON DEVICES, vol. 68, no. 12, pp. 6344–6351, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/94966.