Journal of Materials Science: Materials in Electronics

, Volume 23, Issue 9, pp 1673–1677 | Cite as

Effects of Al doping on the optical and electrical properties of pre-synthesized ZnO powders by solid state method



White and fluffy Al-doped zinc oxide powders were fabricated using ZnO and Al(C3H7O)3 powders by a solid state method. The effects of Al doping on microstructure, electrical and optical properties were systematically studied. XRD and Raman results show that the Al-doped powders have a pure hexagonal wurtzite structure. The resistivity of ZnO could be decreased from 108 to 102 Ω cm with the Al doped concentration of 3 at.%. Meanwhile, the obtained powders exhibited high diffuse reflectance in visible region, intense UV emission without deep level emission and good environmental stability. Results reveal that the optical property of the powders has an intimate relationship with the electrical property. The decline of the diffuse reflectance at visible wavelengths and the strong IR absorption were due to the increase of the free electron concentration. Al doping leads to quenching of defect related visible band emission, and we surmise that the defect centers are mainly related to oxygen vacancies (V O ) and zinc vacancies (V Zn ). Al doping mechanism was also tentatively explored.


Aluminum Dope Zinc Oxide Deep Level Emission Dope Zinc Oxide Zinc Oxide Powder High Environment Stability 



Financial support of this work was provided by National Basic Research Foundation of China (No. 61343).


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© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Key Laboratory on Materials Behavior & Evaluation Technology in Space Environment, School of Materials Science and EngineeringHarbin Institute of TechnologyHarbinPeople’s Republic of China

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