Work

Aliovalent doping strategy toward band structure modulation and enhanced mechanoluminescence of CaZnOS: Mn2+

Year: 2025

Type: article

Abstract: • The aliovalent doping strategy was employed in the mechanoluminescence matrix. • A series of (K,Gd) x Ca 0.96- x ZnOS: 0.04Mn 2+ samples was synthetized. • The impact of substitution on phase purity, composition and morphology was analyzed. • The band structure was investigated using UV–Vis measurements and density functional theory calculations. • After aliovalent doping, the concentration of oxygen vacancy increased and the band gap narrowed. • The mechanoluminescence intensity is reinforced by a factor of ∼1.4. Mechanoluminescence (ML) behavior has been extensively studied in recent years in fields such as sensing and lighting. The primary obstacle hindering the large-scale commercial application of ML materials is that they only exhibit significant luminescence when subjected to relatively strong stress stimuli. We in this work employed the aliovalent doping strategy in the ML matrix CaZnOS for the first time to modify the crystal and electronic structure of the material, thereby optimizing its ML property. The impact of Ca 2+ substitution by ( K + , Gd 3+ ) ionic pair on phase purity, composition and morphology was systematically analyzed by the combined techniques of XRD, ICP, TEM, and XPS. The band structure of the representative samples was further investigated using UV–Vis measurements and density functional theory (DFT) calculations. After aliovalent doping, not only the concentration of oxygen vacancy increased but also the band gap narrowed. These two changes respectively enhanced the number of hole-electron pairs and facilitated their combination during the ML process, ultimately leading to an enhancement of the ML intensity.

Source: Chemical Engineering Journal Advances

DOI: 10.1016/j.ceja.2025.100820

Authors: Zhihao Wang, Shuanglin Zhang, Xiping Zeng, Dengfeng Peng, Yu Wang, Jinbo Wu

Institutions: Shenzhen University, Shenzhen MSU-BIT University, Shanghai University

Language: English

Topic: Luminescence Properties of Advanced Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,050

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China, Science and Technology Planning Project of Shenzhen Municipality, Special Project for Research and Development in Key areas of Guangdong Province