Year: 2025
Type: article
Abstract: To meet the growing demand for stable dual-emission phosphors in optoelectronic applications, this study investigates a self-reduction strategy in Mn-doped Li2ZnGe3O8 (LZGO) phosphors. The spinel-structured LZGO lattice enables the coexistence of Mn2+ and Mn4+ via oxygen vacancies and lattice defects, achieving visible (Vis) and near-infrared (NIR) dual emission without the need for external reducing agents. Spectroscopic analyses, including X-ray photoelectron spectroscopy (XPS) and diffuse reflectance spectroscopy (DRS), confirm the heterovalent Mn states, with distinct lifetimes of 3.63 ms (Mn2+) and 0.32 ms (Mn4+) under selective excitation. The LZGO:xMn system thus demonstrates excitation-tunable Vis-NIR luminescence and high stability, making it a cost-effective and environmentally friendly candidate for anti-counterfeiting and bioimaging applications. This work presents a defect engineering driven design concept for developing multifunctional redox-active phosphors with broad application prospects.
Source: Journal of Advanced Ceramics
Authors: Yujia Wang, Xin Pan, Zunqi Liu, Zhaojie Wu, Yiren Xiao, Ke Su, Yinghua Rao, Yuanhao Jian, Qingfeng Guo, Libing Liao, Lefu Mei
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,372
OpenAlex ID: W4411325509