journal article·2025-10-21

Controllable Synthesis of Gradient α/β-ZnS:Cu for Revealing the Mechanoluminescent Mechanisms

Yongqing Bai, Zhidong Ma, Birong Tian, Biyun Fan, Xianfeng Jin, Mengxiao Chen, Zhaofeng Wang, Xiandi Wang, Xun Han

ACS Nano· Volume 19· Issue 41
Publisher page

Abstract

ZnS:Cu, with interband direct transition, exhibits complex and tunable emission spectra due to the additional energy levels introduced by Cu doping, making it ideal for mechanoluminescent devices. However, the coexistence of α- and β-ZnS:Cu phases and diverse Cu ion doping complicates the coupling of various luminescent processes and understanding its mechanoluminescent mechanism. Here, the gradient α/β-ZnS:Cu with pure-phase and single-structure has been synthesized through an oxygen-assisted variable-temperature rapid cooling sintering method with low Cu concentration. Oxygen introduction promoted the formation of sulfur vacancies, enabling precise regulation of Cu doping amount and site. By fine-tuning the sintering process and Cu concentration, the composition of α/β-ZnS:Cu was adjusted precisely while suppressing impurities. Using this tunable-gradient α/β-ZnS:Cu, the complex luminescence processes were decoupled, confirming that the piezoelectricity of ZnS:Cu directly stimulates mechanoluminescence generation. This understanding proves valuable in refining the mechanoluminescence mechanism and enhancing the design of mechanoluminescent materials.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Luminescence and Fluorescent Materials · Luminescence Properties of Advanced Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Integrated Circuits, School of Materials Science and Engineering, Hangzhou Global Scientific and Technological Innovation Centre

Zhejiang University

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics

Chinese Academy of Sciences

College of Physics and Electronic Information Engineering

Qinghai Normal University

Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai

Department of Applied Physics

The Hong Kong Polytechnic University

Funding

China Postdoctoral Science Foundation · Taishan Scholar Project of Shandong Province · National Natural Science Foundation of China · Chinese Academy of Sciences · Natural Science Foundation of Zhejiang Province · Key Laboratory for Biomedical Engineering, Ministry of Education, Zhejiang University · Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University

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