通过辛胺处理提高 Zn(0.98)Mn(0.02)O 纳米晶中 Mn 的溶解度并抑制氧空位密度。

Improving the solubility of Mn and suppressing the oxygen vacancy density in Zn(0.98)Mn(0.02)O nanocrystals via octylamine treatment.

机构信息

Department of Physics and Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, PR China.

出版信息

ACS Appl Mater Interfaces. 2012 Sep 26;4(9):4470-5. doi: 10.1021/am301471v. Epub 2012 Sep 12.

Abstract

Zn(0.98)Mn(0.02)O nanocrystals were synthesized by the wet chemical route and were treated with different content of octylamine. The environment around Mn and the defect type and concentration were characterized by photoluminescence, Raman, X-ray photoelectron spectroscopy, and X-ray absorption fine structure. It is found that N codoping effectively enhances the solubility of Mn substituting Zn via reducing donor binding energy of impurity by the orbital hybridization between the N-acceptor and Mn-donor. On the other hand, the O atoms released from MnO(6) and the N ions from octylamine occupy the site of oxygen vacancies and result in reduction of the concentration of oxygen vacancies in Zn(0.98)Mn(0.02)O nanocrystals.

摘要

Zn(0.98)Mn(0.02)O 纳米晶体通过湿化学法合成，并经过不同含量的辛胺处理。通过光致发光、拉曼、X 射线光电子能谱和 X 射线吸收精细结构来表征 Mn 周围的环境以及缺陷类型和浓度。结果发现，N 共掺杂通过 N-受体和 Mn-供体之间的轨道杂化有效降低了杂质施主结合能，从而有效提高了 Mn 取代 Zn 的溶解度。另一方面，MnO(6) 中释放的 O 原子和辛胺中的 N 离子占据氧空位的位置，导致 Zn(0.98)Mn(0.02)O 纳米晶体中氧空位浓度降低。