Self-organized growth of Indium-Tin-Oxide nanowires

Roos, Nils; Sidiki, Tamim P.; Seekamp, J.; Torres, C. M. Sotomayor

doi:10.1063/1.1342546

Cited by 1 publication

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“…The fabrication techniques of homogeneous 1-D nanostructures have pursued the control over shape, aspect ratio, and crystalline arrangement to a considerable degree (11)(12)(13)(14)(15), and the improvement of the synthesis methods (16)(17)(18) has recently achieved the direct integration of functional nanostructures into nanodevices (19)(20)(21). So far, indium tin oxide (ITO) thin films are widely used, (14,16,17) whereas one-dimensional (1-D) nanostructures have been shown through a large volume of investigations to have slightly different morphology-related optical and electrical properties (18,19).…”

Section: Introductionmentioning

confidence: 99%

Epitaxial growth of an antireflective, conductive, graded index ITO nanowire layer

O’Dwyer¹,

Torres²

2013

Front. Physics

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Nanoporous and nanostructured films, assemblies and arrangements are important from an applied point of view in microelectronics, photonics and optical materials. The ability to minimize reflection, control light output and use contrast and variation of the refractive index to modify photonic characteristics can provide routes to enhanced photonic crystal devices, omnidirectional reflectors, antireflection coatings and broadband absorbing materials. This work shows how multiscale branching of defect-free ITO NWs grown as a layer with a graded refractive index improves antireflection properties and shifts the transparency window into the near-infrared (NIR). The measurements confirm the structural quality and growth mechanism of the NW layer without any heterogeneous seeding for NW growth. Optical reflectance measurements confirm broadband antireflection (reflection <5%) between 1.3 and 1.6 μm which is tunable with the NW density. The work also outlines how the suppression of the Burstein-Moss shifts using refractive index variation allows transparency in a conductive NW layer into NIR range.

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