Structure-dependent optical and electrical transport properties of nanostructured Al-doped ZnO

TL;DR

This study systematically explores how the structure and morphology of nanostructured Al-doped ZnO thin films influence their optical and electrical properties, providing insights for optimizing photovoltaic applications.

Contribution

It presents a detailed analysis of the structure-property relationship in nanostructured Al-doped ZnO films grown by Pulsed Laser Deposition, highlighting how morphology affects functional properties.

Findings

Correlation between structure and optical/electrical properties elucidated

Dependence of energy gap and conduction band effective mass on morphology

Potential for optimizing photovoltaic device performance

Abstract

The structure-property relation of nanostructured Al-doped ZnO thin films has been investigated in detail through a systematic variation of structure and morphology, with particular emphasis on how they affect optical and electrical properties. A variety of structures, ranging from compact polycristalline films to mesoporous, hierarchically organized cluster assemblies, are grown by Pulsed Laser Deposition at room temperature at different oxygen pressures. We investigate the dependence of functional properties on structure and morphology and show how the correlation between electrical and optical properties can be studied to evaluate energy gap, conduction band effective mass and transport mechanisms. Understanding these properties opens the way for specific applications in photovoltaic devices, where optimized combinations of conductivity, transparency and light scattering are required.