Visible and near-infrared luminescent properties of Pr3+ doped strontium molybdate thin films by a facile polymer-assisted deposition process

Fengjun Chun; Wen Li; Binbin Zhang; Wen Deng; Xiang Chu; Hai Su; Hanan Osman; Haitao Zhang; Xiaoyun Zhao; Weiqing Yang

doi:10.1016/j.jcis.2018.07.040

Visible and near-infrared luminescent properties of Pr³⁺ doped strontium molybdate thin films by a facile polymer-assisted deposition process

J Colloid Interface Sci. 2018 Dec 1:531:181-188. doi: 10.1016/j.jcis.2018.07.040. Epub 2018 Jul 19.

Authors

Fengjun Chun¹, Wen Li¹, Binbin Zhang¹, Wen Deng¹, Xiang Chu¹, Hai Su¹, Hanan Osman¹, Haitao Zhang¹, Xiaoyun Zhao², Weiqing Yang³

Affiliations

¹ Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
² College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China.
³ Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China; State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China. Electronic address: wqyang@swjtu.edu.cn.

PMID: 30031260
DOI: 10.1016/j.jcis.2018.07.040

Abstract

Quartz substrate supported Praseodymium (Pr) doped strontium molybdate (SrMoO₄) thin films with good uniformity and outstanding fluorescent properties are successfully fabricated via a facile polymer-assisted deposition (PAD) method. In combination with the strong chelating effect of water-soluble polymer on metal cations, the free cations without chelating are effectively ruled out but the remaining chelating metal cations are employed for the highly uniform and accurate stoichiometry luminescent SrMoO₄: Pr thin films, layer-by-layer mounting on the common quartz substrates. More importantly, the excellent release of stress from polymer during the growth process of epitaxial thin film can effectively overcome the mismatch between thin film and common quartz substrate and then guarantee the quality of thin film. Under the ultraviolet (UV) light excitation, the samples show high luminescence intensity both in visible and near-infrared (NIR) regions peaked at 646 nm and 1037 nm, mainly ascribing to the transitions of ³P₀ → ³F₂ and ¹G₄ → ³H₄ of Pr³⁺ ions. The luminescent properties can be tailored by optimizing the number of spin-coated layers and doping concentrations. The maximum emission occurs at 4 mol% of Pr³⁺ dopant, and it exhibits an impressive high photoluminescence quantum yield (QY) of up to 86.12%. These results evidently demonstrate the present PAD method is a useful prototype for preparing high performance luminescent thin films even on the cheap quartz substrate.

Keywords: Multilayer thin films; Polymer-assisted deposition; Quartz substrate; SrMoO(4): Pr; Visible and NIR emission.