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

被引:56
|
作者
Gondoni, P. [1 ,2 ]
Ghidelli, M. [1 ,2 ]
Di Fonzo, F. [3 ]
Carminati, M. [4 ]
Russo, V. [1 ,2 ]
Bassi, A. Li [1 ,2 ,3 ]
Casari, C. S. [1 ,2 ,3 ]
机构
[1] Politecn Milan, Dipartimento Energia, I-20133 Milan, Italy
[2] Politecn Milan, NEMAS Ctr NanoEngn Mat & Surfaces, I-20133 Milan, Italy
[3] Ist Italiano Tecnol, Ctr Nano Sci & Technol Polimi, I-20133 Milan, Italy
[4] Politecn Milan, Dipartimento Elettron & Informaz, I-20133 Milan, Italy
关键词
PULSED-LASER DEPOSITION; OXIDE THIN-FILMS; CONSTANTS;
D O I
10.1088/0957-4484/23/36/365706
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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 polycrystalline 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 up opportunities for specific applications in photovoltaic devices, where optimized combinations of conductivity, transparency and light scattering are required.
引用
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页数:8
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