Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Jun;32(25):e2001537.
doi: 10.1002/adma.202001537. Epub 2020 May 14.

Weighted Mobility

G Jeffrey Snyder  1 , Alemayouh H Snyder  2 , Maxwell Wood  1 , Ramya Gurunathan  1   2 , Berhanu H Snyder  1 , Changning Niu  2
Affiliations

Weighted Mobility

G Jeffrey Snyder et al. Adv Mater. 2020 Jun.

Abstract

Engineering semiconductor devices requires an understanding of charge carrier mobility. Typically, mobilities are estimated using Hall effect and electrical resistivity meausrements, which are are routinely performed at room temperature and below, in materials with mobilities greater than 1 cm2 V-1 s-1 . With the availability of combined Seebeck coefficient and electrical resistivity measurement systems, it is now easy to measure the weighted mobility (electron mobility weighted by the density of electronic states). A simple method to calculate the weighted mobility from Seebeck coefficient and electrical resistivity measurements is introduced, which gives good results at room temperature and above, and for mobilities as low as 10-3 cm2 V-1 s-1 , [Formula: see text] Here, μw is the weighted mobility, ρ is the electrical resistivity measured in mΩ cm, T is the absolute temperature in K, S is the Seebeck coefficient, and kB /e = 86.3 µV K-1 . Weighted mobility analysis can elucidate the electronic structure and scattering mechanisms in materials and is particularly helpful in understanding and optimizing thermoelectric systems.

Keywords: electrical measurements; electrical transport; mobility; organic semiconductors; photovoltaics; semiconductors; thermoelectrics.

PubMed Disclaimer

References

    1. Y. Qin, Y. Xiao, L.-D. Zhao, APL Mater. 2020, 8, 010901.
    1. F. Werner, J. Appl. Phys. 2017, 122, 135306.
    1. M. M. Mandoc, L. J. A. Koster, P. W. M. Blom, Appl. Phys. Lett. 2007, 90, 133504.
    1. K. A. Borup, E. S. Toberer, L. D. Zoltan, G. Nakatsukasa, M. Errico, J.-P. Fleurial, B. B. Iversen, G. J. Snyder, Rev. Sci. Instrum. 2012, 83, 123902.
    1. A. F. May, G. J. Snyder, Introduction to Modeling Thermoelectric Transport at High Temperatures, CRC Press, Boca Raton, FL, USA 2012, pp. 1-18.

LinkOut - more resources