Oxygen-assisted preparation of mechanoluminescent ZnS：Mn for dynamic pressure mapping  

作　　者：Xiandi Wang Rui Ling Yufei Zhang Miaoling Que Yiyao Peng Caofeng Pan 

机构地区：[1]Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China [2]CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China [3]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [4]Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China

出　　处：《Nano Research》2018年第4期1967-1976,共10页纳米研究（英文版）

基　　金：The authors are thankful for support from National Natural Science Foundation of China （Nos. 51622205, 61675027, 61405040, 51432005, 61505010, and 51502018）, National Key R ＆ D project from Minister of Science and Technology, China （No. 2016YFA0202703）, National Postdoctoral Program for Innovative Talents （No. BX201600040）, China Postdoctoral Science Foundation Funded Project （No. 2016M600976） and the ＂Thousand Talents＂ program of China for pioneering researchers and innovative teams.

摘　　要：Mechanoluminescent materials that convert mechanical stimuli to light emission have attracted extensive attention for potential applications in human-machine interactions. Here, we report a simple and available novel approach for the oxygen-assisted preparation of ZnS：Mn particles by solid-state reaction at atmospheric pressure without the formation of the corresponding oxides. The existence of O2 has a positive impact on the formation of S vacancies in wurtzite-phase ZnS, leading to the introduction of Mn2＋ ion luminescent centers and shallow donor levels, which can improve the electron-hole recombination rate. The O2 ratio and Mn2＋ ion doping concentration have significant effects on the luminous efficienc）5 which is optimal at 1%-20% and 1 at.%-2 at.% respectively. In addition, a device based on the piezo-photonic effect with excellent pressure sensitivity of 0.032 MPa-1 was fabricated, which can map the two-dimensional pressure distribution ranging from 2.2 to 40.6 MPa in situ. This device can be applied to real-time pressure mapping, smart sensor networks, high-level security systems, human-machine interfaces, and artificial skins.Mechanoluminescent materials that convert mechanical stimuli to light emission have attracted extensive attention for potential applications in human-machine interactions. Here, we report a simple and available novel approach for the oxygen-assisted preparation of ZnS：Mn particles by solid-state reaction at atmospheric pressure without the formation of the corresponding oxides. The existence of O2 has a positive impact on the formation of S vacancies in wurtzite-phase ZnS, leading to the introduction of Mn2＋ ion luminescent centers and shallow donor levels, which can improve the electron-hole recombination rate. The O2 ratio and Mn2＋ ion doping concentration have significant effects on the luminous efficienc）5 which is optimal at 1%-20% and 1 at.%-2 at.% respectively. In addition, a device based on the piezo-photonic effect with excellent pressure sensitivity of 0.032 MPa-1 was fabricated, which can map the two-dimensional pressure distribution ranging from 2.2 to 40.6 MPa in situ. This device can be applied to real-time pressure mapping, smart sensor networks, high-level security systems, human-machine interfaces, and artificial skins.

关 键 词：oxygen assistance piezo-photonic effect pressure mapping ZnS：Mn 

分 类 号：TH137.51[机械工程—机械制造及自动化] TN304.25[电子电信—物理电子学]