Indium Zinc Oxide Pyramids with Pinholes and Nanopipes

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• 作者：Javier Bartolome虂 ; David Maestre ; Mateo Amati ; Ana Cremades ; Javier Piqueras
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：April 28, 2011
• 年：2011
• 卷：115
• 期：16
• 页码：8354-8360
• 全文大小：955K
• 年卷期：v.115,no.16(April 28, 2011)
• ISSN：1932-7455

文摘

Micropyramids of zinc-doped indium oxide have been grown by thermal treatments of compacted InN and ZnO powders at temperatures between 700 and 900 掳C under argon flow. X-ray diffraction (XRD) measurements and energy-dispersive X-ray (EDS) mappings as well as local EDS spectra enable the identification of rough surfaces of the pyramids with the nucleation of a shell of nanocrystallites with high Zn/In ratio because of the formation of Zn_kIn₂O_k+3. Some of the pyramids have a truncated tip with pinholes with regular crystalline facets. The apexes of these pinholes present a hollow core or nanopipe. The possible relation of the nanopipes with a dislocation driven growth is discussed. A growth model is proposed from the morphology evolution of the pyramids during the formation of the In₂O₃鈭抁nO (IZO) compound. X-ray photoelectron spectroscopy and microscopy (XPS-ESCA) measurements are used to discuss the Zn incorporation as a dopant and the formation of Zn_kIn₂O_k+3 ternaries. Cathodoluminescence (CL) in the scanning electron microscopy (SEM) shows a dependence of the luminescence of the microstructures on the Zn concentration and the growth temperature.