Zn基柱状ZnO取向生长机制

doi:10.3724/SP.J.1077.2013.12225

无机材料学报 ›› 2013, Vol. 28 ›› Issue (3): 301-306.DOI: 10.3724/SP.J.1077.2013.12225 CSTR: 32189.14.SP.J.1077.2013.12225

Zn基柱状ZnO取向生长机制

刘长友¹, 王金芳¹, 孙晓燕¹, 王泽温², 介万奇¹

(1. 西北工业大学材料学院凝固技术国家重点实验室, 西安 710072; 2. 西安理工大学材料学院, 西安 710032)

收稿日期:2012-04-11 修回日期:2012-05-29 出版日期:2013-03-20 网络出版日期:2013-02-20
基金资助:
凝固技术国家重点实验室自主课题(74-QP-2011); 西北工业大学基础研究基金(JC20110247); 陕西省教育厅科学研究项目(2010JK760)

Alignment Growth Mechanisms of Rod-like ZnO on Zinc Substrates

LIU Chang-You¹, WANG Jin-Fang¹, SUN Xiao-Yan¹, WANG Ze-Wen², JIE Wan-Qi¹

(1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China; 2. College of Material Science and Engineering, Xi’an University of Technology, Xi’an 710032, China)

Received:2012-04-11 Revised:2012-05-29 Published:2013-03-20 Online:2013-02-20
Supported by:
Independent Subject of State Key Laboratory of Solidification Processing (74-QP-2011); Basic Research Project of Northwestern Polytechnical University (JC20110247); Scientific Research Fund of Shaanxi Provincial Education Department (2010JK760)

摘要/Abstract

摘要： 通过预氧化处理在Zn基底上制备了ZnO颗粒膜, 并由N₂H₄·H₂O-水热体系制备了Zn基柱状ZnO阵列。实验发现, 在Zn单一晶体学取向表面上柱状ZnO高度有序排列, 据此提出了Zn基柱状ZnO的自由生长取向机制。水热反应条件下, ZnO微晶通常具有沿c轴优先生长的结晶习性, 柱状体高度有序排列取决于ZnO晶核的状态。单一晶体学取向表面上晶核的状态一致, 决定了ZnO柱状体取向一致。Zn基柱状ZnO阵列光致发光谱分析表明, 在30~60 K之间, 近带边激子发射峰强度呈现反常温度依赖的“负热淬灭”现象, 该过程包含了两个无辐射过程和一个负热淬灭过程。

关键词: 氧化锌, 锌基底, 取向生长机理, 光致发光

Abstract: Discontinuous films of ZnO particles were prepared on zinc substrates by air pre-oxidation process. The arrays of rod-like ZnO nano-/micro- crystals on zinc substrates were synthesized through hydrothermal processing with N₂H₄·H₂O solution. It is found that the rod-like ZnO nano-/micro-crystals align well on the substrate surface with a unique crystallographic orientation. The experimental results suggest a free alignment growth mechanism for rod-like ZnO nano-/micro-crystals on zinc substrates. The crystallization habit of ZnO nano-/micro-crystals is to grow along with the c axis fast under hydrothermal conditions, thus the well alignment of rod-like ZnO nano-/micro-crystals only depends on the state of ZnO nuclei on the substrate surface. The states of ZnO nuclei on the substrate surface with a unique crystallographic orientation well agree with others, which regulates the alignment of rod-like ZnO nano-/micro-crystals. In temperature-dependent photoluminescence spectra, the "negative thermal quenching" phenomenon of near band-gap edge excitons is observed in the temperature ranging from 30 K to 60 K, which identify two non-radiative processes and one negative thermal quenching process.

Key words: zinc oxide, zinc substrate, alignment growth mechanism, photoluminescence

中图分类号:

刘长友, 王金芳, 孙晓燕, 王泽温, 介万奇. Zn基柱状ZnO取向生长机制[J]. 无机材料学报, 2013, 28(3): 301-306.

LIU Chang-You, WANG Jin-Fang, SUN Xiao-Yan, WANG Ze-Wen, JIE Wan-Qi. Alignment Growth Mechanisms of Rod-like ZnO on Zinc Substrates[J]. Journal of Inorganic Materials, 2013, 28(3): 301-306.

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Zn基柱状ZnO取向生长机制

Alignment Growth Mechanisms of Rod-like ZnO on Zinc Substrates

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