期刊
JOURNAL OF LUMINESCENCE
卷 199, 期 -, 页码 423-432出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2018.03.054
关键词
Mn-ZnO films; Photoluminescence; White light; Optical properties; Magnetic properties
类别
资金
- UGC-DAE Consortium for Scientific Research, Mumbai Center India [UDCSR/MUM/AO/CRS-M-212/2015/511]
- Science and Engineering Research Board (SERB) [SB/ST/CMP-017/ 2014]
- Manipal Academy of Higher Education, Manipal
Thin films of Zn1-xMnxO (where x = 0.01-0.1), a transparent dilute magnetic semiconductor were grown on a glass substrate using cost-effective chemical spray pyrolysis. All films were polycrystalline and most intense XRD peak changed from (002) at lower x values to (100) plane for higher doping level. The deposits possessed the fibrous structure up to x = 0.04, a flowered structure for x = 0.05-0.07, and spheroid structure for x = 0.08-0.10, as revealed by SEM. The visible region, optical transmittance systematically changed from 90% to 55%, with increasing dopant concentration. The optical energy band-gap decreased at higher doping levels attributed to the sp-d exchange interactions. The photoluminescence (PL) spectroscopy revealed the presence of various defects which pronounced with increasing Mn%. As a result of multiple defect induced transitions, the PL spectra spanned the entire visible spectrum. Zn.95Mn.05O films showed CIE values with x = 0.333 and y = 0.322, perfectly matching to that of pure white light, with a Colour Temperature of 5475 K. The magnetic measurements confirm that the higher Mn-doped films displayed room-temperature ferromagnetism while less doped films showed weak ferromagnetic effects at 5 K.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据