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Morphology-driven electrical and optical properties in graded hierarchical transparent conducting Al:ZnO

Published online by Cambridge University Press:  01 May 2014

P. Gondoni ,
P. Mazzolini ,
A. M. Pillado Pérez ,
V. Russo ,
A. Li Bassi  and
C. S. Casari
P. Gondoni
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy
P. Mazzolini
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia Via Pascoli 70/3, 20133 Milano, Italy
A. M. Pillado Pérez
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy
V. Russo
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy
A. Li Bassi
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia Via Pascoli 70/3, 20133 Milano, Italy
C. S. Casari
Affiliation:
Dipartimento di Energia and NEMAS – Center for NanoEngineered Materials and Surfaces, Politecnico di Milano - Via Ponzio 34/3, 20133 Milano, Italy Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia Via Pascoli 70/3, 20133 Milano, Italy
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Abstract

Graded Al-doped ZnO layers, constituted by a mesoporous forest-like system evolving into a compact transparent conductor, were synthesized by Pulsed Laser Deposition with different morphologies to study the correlation with functional properties. Morphology was monitored by Scanning Electron Microscopy images and by measuring the resulting surface roughness. Its effects on electrical conductivity – especially carrier mobility, which significantly decreases with increasing roughness – allow to discuss the limitations in conduction mechanisms. Significant changes in light scattering capability due to variations in morphology are also investigated and discussed to study the correlation between morphology and functional properties.

Keywords

photovoltaicphysical vapor deposition (PVD)II-VI
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1699: Symposium LL – Advanced Materials for Rechargeable Batteries , 2014 , mrss14-1699-ll05-20
Copyright
Copyright © Materials Research Society 2014 

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References

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