The effect of nanowire length and diameter on the properties of transparent, conducting nanowire films.


Journal Article

This article describes how the dimensions of nanowires affect the transmittance and sheet resistance of a random nanowire network. Silver nanowires with independently controlled lengths and diameters were synthesized with a gram-scale polyol synthesis by controlling the reaction temperature and time. Characterization of films composed of nanowires of different lengths but the same diameter enabled the quantification of the effect of length on the conductance and transmittance of silver nanowire films. Finite-difference time-domain calculations were used to determine the effect of nanowire diameter, overlap, and hole size on the transmittance of a nanowire network. For individual nanowires with diameters greater than 50 nm, increasing diameter increases the electrical conductance to optical extinction ratio, but the opposite is true for nanowires with diameters less than this size. Calculations and experimental data show that for a random network of nanowires, decreasing nanowire diameter increases the number density of nanowires at a given transmittance, leading to improved connectivity and conductivity at high transmittance (>90%). This information will facilitate the design of transparent, conducting nanowire films for flexible displays, organic light emitting diodes and thin-film solar cells.

Full Text

Duke Authors

Cited Authors

  • Bergin, SM; Chen, Y-H; Rathmell, AR; Charbonneau, P; Li, Z-Y; Wiley, BJ

Published Date

  • March 2012

Published In

Volume / Issue

  • 4 / 6

Start / End Page

  • 1996 - 2004

PubMed ID

  • 22349106

Pubmed Central ID

  • 22349106

Electronic International Standard Serial Number (EISSN)

  • 2040-3372

International Standard Serial Number (ISSN)

  • 2040-3364

Digital Object Identifier (DOI)

  • 10.1039/c2nr30126a


  • eng