Aller au menu Aller au contenu
Physico chemistry of solids, thin films, biotechnologies
Applications for micro & nano- technologies, energy, health ...
< >

> Research > Research-NanoMAT

Semiconducting nanowires and nanostructures

The research line SEMICONDUCTING NANOWIRES AND NANOSTRUCTURES aims at developing and exploring the chemical synthesis and properties of ZnO nanowires and related heterostructures combining them with direct band gap semiconductors for a large number of nanoscale engineering devices in the fields of optoelectronics and piezoelectricity.

We work on the elucidation and control of the nucleation and growth mechanisms of ZnO nanowires grown by chemical bath deposition by coupling an experimental approach with a fundamental approach based on thermodynamic computations [5]. These mechanisms are investigated on a large number of nucleation surfaces, from the polycrystalline ZnO seed layer grown by sol-gel process (i.e. dip coating) [3,6] or MOCVD to the ZnO single crystal [14] through to the metallic seed layer. A special emphasis is further made on the development of the selective area growth of these nanowires by technological processes in a cleanroom environment using advanced lithography (i.e. electron-beam assisted lithography, nanoimprint lithography, …) [14]. The properties of these ZnO nanowires are also investigated in details and optimized with the current aim of controlling their doping as much as possible [11,15] and the effects related to their oxygen or zinc polarity by using advanced characterization techniques [8,10,14].

We also develop the synthesis of direct band gap semiconductors by chemical bath deposition [12], SILAR, and ALD, for their combination with the ZnO nanowires in core-shell heterostructures. This allows us to form type II p-n heterojunctions with a high added value. A strong relationship with David Munoz-Rojas and Jean-Luc Deschanvres (i.e. FunSurf Team) occurs in that framework.

The present fundamental work on the synthesis and properties of these nano-objects benefits from a number of ongoing collaborations and has a direct interest for the applicative field. The devices currently under investigation are extremely thin absorber solar cells [13], self-powered UV photodetectors [2], light emitting diodes, piezoelectric nano-generators or also pressure sensors.

Publications


[15] C. Verrier et al. « Effects of the pH on the Formation and Doping Mechanisms of ZnO Nanowires Using Aluminum Nitrate and Ammonia », Inorganic Chemistry 56, 13111-13122 (2017).

[14] T. Cossuet et al. « Polarity-Dependent Growth Rates of Selective Area Grown ZnO Nanorods by Chemical Bath Deposition », Langmuir 33, 6269-6279 (2017).

[13] R. Parize et al. « ZnO/TiO2/Sb2S3 Core-Shell Nanowire Heterostructures for Extremely thin absorber Solar Cells », The Journal of Physical Chemistry C 121, 9672-9680 (2017).

[12] R. Parize et al. « In Situ Analysis of the Crystallization Process of Sb2S3 Thin Films by Raman Scattering and X-ray Diffraction », Materials & Design 121, 1-10 (2017).

[11] C. Verrier et al. « Tunable Morphology and Doping of ZnO Nanowires by Chemical Bath Deposition Using Aluminum Nitrate », The Journal of Physical Chemistry C 121, 3573-3583 (2017).

[10] S. Guillemin et al. « Quantitative and Simultaneous Analysis of the Polarity of Polycrystalline ZnO Seed Layers and Related Nanowires Grown by Wet Chemical Deposition », Nanotechnology 28, 095704 (2017).

[9] R. Cusco et al. « Phase Discrimination in CdSe Structures by Means of Raman Scattering », Physica Status Solidi RRL 11, 1700006 (2017).

[8] J. Zuniga-Perez et al. « Polarity in GaN and ZnO: Theory, measurement, growth, devices », Applied Physics Reviews 3, 041303 (2016).

[7] V. Consonni et al. « Identifying and Mapping the Polytypes and Orientation Relationships in ZnO/CdSe Core-Shell Nanowire Arrays », Nanotechnology 27, 445712 (2016).

[6] S. Guillemin et al. « Identification of Extended Defect and Interface Related Luminescence Lines in Polycrystalline ZnO Thin Films Grown by Sol-Gel Process », RSC Advances 6, 44987 (2016).

[5] R. Parize et al. « Effects of Hexamethylenetetramine on the Nucleation and Radial Growth of ZnO Nanowires by Chemical Bath Deposition », The Journal of Physical Chemistry C 120, 5242-5250 (2016).

[4] S. Guillemin et al. « Spontaneous Shape Transition of Thin Films into ZnO Nanowires with High Structural and Optical Quality », Nanoscale 7, 16994-17003 (2015).

[3] S. Guillemin et al. « Controlling the Structural Properties of Single Step, Dip Coated ZnO Seed Layers for Growing Perfectly Aligned Nanowire Arrays », The Journal Physical Chemistry C 119, 21694-21703 (2015).

[2] J. Garnier et al. « Physical Properties of Annealed ZnO Nanowire/CuSCN Heterojunctions for Self-Powered UV Photodetectors », ACS Applied Materials & Interfaces 7, 5820-5829 (2015).

[1] J. Michallon et al. « Light Absorption Processes and Optimization of ZnO/CdTe Core-Shell Nanowire Arrays for Nanostructured Solar Cells », Nanotechnology 26, 075401 (2015).

Projects


ANR DOSETTE (2018-2021, coordinateur)
Type: Research National Agency, young investigator call
Title: Ordered ZnO nanowire-based type II heterostructures for self-powered UV photodetectors

ANR ROLLER (2018-2021, collaborator)
Type: Research National Agency, collaborative program call
Title: Resistive, unipolar and ordered ZnO nanowire arrays for flexible sensors adapted to biological media
Partenship: Institut Néel (Grenoble), INL (Lyon), LGEF (Lyon)

ECOLED (2017-2019, coordinator)
Type: Institut Carnot Energies du Futur
Title: New generation of eco-efficient white LEDs : coupling of ZnO UV LEDs with aluminoborate phosphors
Partenship : Institut Néel (Grenoble)

International Collaborations

  • Swansea University, South Wales
  • Tallinn University of Technology, Estonia
  • Aristotle University of Thessaloniki, Greece
  • Institut Jaume Almera, Spain
  • Cambridge University, England

Date of update May 11, 2018

  • Tutelle CNRS
  • Tutelle Grenoble INP
Univ. Grenoble Alpes