Chemical bath deposition of Mn-doped ZnS thin films using greener complexing agents: Effect of Mn-doping on the optical properties

详细信息    查看全文

• 作者：Babu Pejjai^a ; ^{pdmj.babu@gmail.com} ; Vasudeva Reddy Minnam Reddy^a ; Kondaiah Seku^c ; Tulasi Ramakrishna Reddy Kotte^b ; Chinho Park^a ; ^{chpark@ynu.ac.kr}
• 关键词：Mn-doped ZnS thin films ; Chemical bath deposition ; Photoluminescence
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：608-618
• 全文大小：1835 K
• 卷排序：130

文摘

Manganese (Mn)-doped ZnS thin films were deposited by chemical bath deposition using a greener complexing agent, trisodium citrate. The effects of the Mn-doping concentration on the structural, optical and photoluminescence properties of Mn-doped ZnS thin films was investigated in the range, Mn = 0–12 at.%. The doping concentration of Mn was measured by inductively coupled plasma–atomic emission spectroscopy and energy dispersive X-ray spectroscopy. Morphological analysis showed that the shape of the grains over the substrate surface was changed from angular to round with increasing Mn-doping concentration. Structural analysis revealed cubic ZnS in the entire range of targeted Mn-doping concentration. The band gap of the films was calculated using optical transmittance data that varied in the range, 3.68–3.81 eV, according to the Mn-doping concentration. The room temperature photoluminescence spectra of these samples exhibited a broad, intense blue and orange emissions. A strong emission band centered at 585 nm suggests the successful incorporation of Mn2+ ions into the ZnS lattice. A high photoluminescent yield was observed for an optimum doping concentration of 6 at.% Mn.