Zn Doping-Induced Shape Evolution of Microcrystals: The Case of Cuprous Oxide

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• 作者：Bojun Heng ; Ting Xiao ; Wei Tao ; Xiaoyan Hu ; Xinqi Chen ; Bixiao Wang ; Daming Sun ; Yiwen Tang
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：3998-4005
• 全文大小：529K
• 年卷期：v.12,no.8(August 1, 2012)
• ISSN：1528-7505

文摘

Zn-doped Cu₂O polyhedrons with various crystal morphologies, from 50-facet and 26-facet to 8-facet, were synthesized via a mild, low-temperature process based on the hydrothermal method. Addition of zinc salt to the reaction mixture might allow the introduction of Zn ions into the Cu₂O crystal lattice, which is shown by X-ray photoelectron spectroscopy and energy dispersive spectroscopy. Doping of Cu₂O crystals with Zn affects not only their morphologies but also significantly influences their optoelectronic properties. UV鈥搗isible and photoluminescence (PL) tests showed that the Zn-doped Cu₂O system displays an increased band gap and enhanced photoluminescence properties. The open circuit potential-time (Ocp-t) method shows that a pure Cu₂O crystal is an n-type semiconductor, while the Zn-doped Cu₂O crystal shows p-type characteristics.