TY  - JOUR
AU  - Deng, Kaiyuan
AU  - Wang, Chuanlong
AU  - Lin, Xiaohui
AU  - Li, Wenjin
AU  - Zhang, Ruonan
AU  - Chang, Chengshuai
AU  - Li, Chonghui
AU  - Nazir, Shoaib
AU  - Hu, Yihua
AU  - Liu, Guangliang Gary
PY  - 2026
TI  - Spectral engineering of Mn4+/Ba2+ co-doped perovskite phosphors for high-performance plant cultivation LED
JO  - Journal of Materiomics
SN  - 2352-8478
VL  - 12
IS  - 4
AB  - Oxide perovskite phosphors (ABO3-type) are promising light-conversion materials for controlled-environment agriculture, but their large indirect bandgaps (3.0–4.7 eV) and strong thermal quenching limit radiative efficiency and stability. In this study, a dual-site engineering strategy is applied to LaMg0.5Sn0.5O3, where partial substitution of Ge4+ for Sn4+ yields a wide-bandgap LaMg0.5Ge0.3Sn0.2O3 host (Eg ≈ 3.7 eV). Density functional theory (DFT) and experimental characterizations confirm that Mn4+ doping introduces mid-gap states, enabling efficient, host-decoupled far-red emission (~703 nm) via the 2E → 4A2 transition. Ba2+ co-doping further enhances the emission intensity by 1.67-fold via charge compensation. The resulting LaMg0.5Ge0.3Sn0.2O3:Mn4+, Ba2+ phosphor exhibits intense and narrow far-red emission (FWHM = 20 nm), a peak internal quantum efficiency of 98.8%, and thermal stability with 78.9% emission retention at 150 ℃. Its emission spectrum aligns well with the absorption profiles of phytochrome Pfr and chlorophyll b, facilitating enhanced photosynthetic response. In proof-of-concept garlic cultivation trials, the fabricated far-red phosphor-converted LEDs demonstrated the capability to effectively promote biomass accumulation and morphological development under a time-segmented lighting schedule. This dual-doping approach provides a versatile design framework for high-performance far-red phosphors in sustainable agriculture lighting.
UR  - https://doi.org/10.1016/j.jmat.2026.101222
DO  - 10.1016/j.jmat.2026.101222