Preparation of Rod-like Aluminum Doped Zinc Oxide Powders by Sol-gel Technique Using Metal Chlorides and Acetylacetone Precursors
- 26 Downloads
Al-doped ZnO (AZO) powders were prepared by using metal chloride precursors and the sol-gel technique. IR peaks observed at 1590 cm-1 and 1620 cm-1 indicated the formation of metal chelate as a consequence of the addition of acetylacetone to the metal chloride solution. TG-DSC analysis of the AZO gels confirmed the formation of metal chelate as evidenced by the development of several weight loss peaks accompanied by the introduction of new endothermic peaks. The resulting AZO gels were annealed at 500, 600, and 800 °C to study the effect of annealing temperature. XRD and SEM results showed that crystallization of AZO gels takes place around 600 °C. Hexagonal wurtzite structure was identified as the main phase for all the samples. In addition, small shift of the XRD (002) peak coupled with XPS results from the AZO powders confirmed the successful doping of the ZnO powders. Micron sized rod-like AZO powders were uniform in dimension and morphology and remained stable even at 800 °C.
Key wordsaluminum doped ZnO rod-like metal chloride sol gel acetylacetone
Unable to display preview. Download preview PDF.
This study was financially supported by Instituto Politécnico Nacional through the project SIP-IPN- 20182176. The authors would like to thank Centro de Nanociencias y Micro y Nanotecnologías-IPN for the analytical methods. One of the authors Keshtkar J wishes to thank National Council of Science and Technology of México (CONACYT) the scholarship for doctoral studies.
- Park SH, Park JB, and Song PK. Characteristics of Al–doped, Gadoped and In–doped zinc–oxide Films as Transparent Conducting Electrodes in Organic Light–emitting Diodes[J]. Current Applied Physics, 2010, 10(3): S488–S490Google Scholar
- Xu Y, Ma PH, and Liu MN. Envelope Method Applied on the AZO Thin Films[J]. Applied Mechanics and Materials, 2012, 268–270: 202Google Scholar
- Wu, H–W and C–H Chu. Structural and Optoelectronic Properties of AZO/Mo/AZO Thin Films Prepared by Rf Magnetron Sputtering[J]. Materials Letters, 2013. 105: 65–67Google Scholar
- Lo S–S, et al. Raman Scattering and Band–gap Variations of Al–doped ZnO Nanoparticles Synthesized by a Chemical Colloid Process[J]. Physics D: Applied Physics, 2009. 42(9): 095420Google Scholar
- Raj Mohan R, Sambath K, and Rajendran K. Experimental Investigation on Structural and Optical Properties of ZnO: AZO Nano Particles by Hydrothermal Synthesis[J]. Materials Science: Materials in Electronics, 2015, 26(3): 1 748–1 755Google Scholar
- Zhang P, et al. Aluminum–doped Zinc Oxide Powders: Synthesis, Properties and Application[J]. Materials Science: Materials in Electronics, 2014, 25(2): 678–692Google Scholar
- Sengupta J, Sahoo RK, and Mukherjee CD. Effect of Annealing on the Structural, Topographical and Optical Properties of Sol–gel Derived ZnO and AZO Thin Films[J]. Materials Letters, 2012, 83:84–87Google Scholar
- LaiC–m, Lin K–m, and Rosmaidah S. Effect of Annealing Temperature on the Quality of Al–doped ZnO Thin Films Prepared by Sol–gel Method[J]. Jol–Gel Science and Technology, 2012, 61(1): 249–257Google Scholar