Evaluating conducting network based transparent electrodes from geometrical considerations

Kumar, Ankush

doi:10.1063/1.4939280

Title: Evaluating conducting network based transparent electrodes from geometrical considerations

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Abstract

Conducting nanowire networks have been developed as viable alternative to existing indium tin oxide based transparent electrode (TE). The nature of electrical conduction and process optimization for electrodes have gained much from the theoretical models based on percolation transport using Monte Carlo approach and applying Kirchhoff's law on individual junctions and loops. While most of the literature work pertaining to theoretical analysis is focussed on networks obtained from conducting rods (mostly considering only junction resistance), hardly any attention has been paid to those made using template based methods, wherein the structure of network is neither similar to network obtained from conducting rods nor similar to well periodic geometry. Here, we have attempted an analytical treatment based on geometrical arguments and applied image analysis on practical networks to gain deeper insight into conducting networked structure particularly in relation to sheet resistance and transmittance. Many literature examples reporting networks with straight or curvilinear wires with distributions in wire width and length have been analysed by treating the networks as two dimensional graphs and evaluating the sheet resistance based on wire density and wire width. The sheet resistance values from our analysis compare well with the experimental values. Our analysis on various examplesmore »« less

Authors:

Kumar, Ankush ^[1]

Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, 560064 Bangalore (India)

Publication Date:: Thu Jan 07 00:00:00 EST 2016

OSTI Identifier:: 22494867

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 119; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; CURRENTS; ELECTRIC CONTACTS; ELECTRODES; GRAPH THEORY; LENGTH; OPTIMIZATION; PERIODICITY; WIDTH; WIRES

Citation Formats


                    Kumar, Ankush, and Kulkarni, G. U., E-mail: guk@cens.res.in. Evaluating conducting network based transparent electrodes from geometrical considerations.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4939280.

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                    Kumar, Ankush, & Kulkarni, G. U., E-mail: guk@cens.res.in. Evaluating conducting network based transparent electrodes from geometrical considerations.  United States.  https://doi.org/10.1063/1.4939280

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                    Kumar, Ankush, and Kulkarni, G. U., E-mail: guk@cens.res.in. 2016.  
        "Evaluating conducting network based transparent electrodes from geometrical considerations".  United States.  https://doi.org/10.1063/1.4939280.

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@article{osti_22494867,

  title        = {Evaluating conducting network based transparent electrodes from geometrical considerations},

  author       = {Kumar, Ankush and Kulkarni, G. U., E-mail: guk@cens.res.in},

  abstractNote = {Conducting nanowire networks have been developed as viable alternative to existing indium tin oxide based transparent electrode (TE). The nature of electrical conduction and process optimization for electrodes have gained much from the theoretical models based on percolation transport using Monte Carlo approach and applying Kirchhoff's law on individual junctions and loops. While most of the literature work pertaining to theoretical analysis is focussed on networks obtained from conducting rods (mostly considering only junction resistance), hardly any attention has been paid to those made using template based methods, wherein the structure of network is neither similar to network obtained from conducting rods nor similar to well periodic geometry. Here, we have attempted an analytical treatment based on geometrical arguments and applied image analysis on practical networks to gain deeper insight into conducting networked structure particularly in relation to sheet resistance and transmittance. Many literature examples reporting networks with straight or curvilinear wires with distributions in wire width and length have been analysed by treating the networks as two dimensional graphs and evaluating the sheet resistance based on wire density and wire width. The sheet resistance values from our analysis compare well with the experimental values. Our analysis on various examples has revealed that low sheet resistance is achieved with high wire density and compactness with straight rather than curvilinear wires and with narrower wire width distribution. Similarly, higher transmittance for given sheet resistance is possible with narrower wire width but of higher thickness, minimal curvilinearity, and maximum connectivity. For the purpose of evaluating active fraction of the network, the algorithm was made to distinguish and quantify current carrying backbone regions as against regions containing only dangling or isolated wires. The treatment can be helpful in predicting the properties of a network simply from image analysis and will be helpful in improvisation and comparison of various TEs and better understanding of electrical percolation.},

  doi          = {10.1063/1.4939280},

  url          = {https://www.osti.gov/biblio/22494867},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 1,

  volume       = 119,

  place        = {United States},

  year         = {Thu Jan 07 00:00:00 EST 2016},

  month        = {Thu Jan 07 00:00:00 EST 2016}

}

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