resumo
Light is the major energy source for plants. In this regard, deep-red light can best drive photosynthetic metabolism and is beneficial for plant growth and development. Herein, an efficient rare-earth free Mn4+-doped Ca2YNbO6 phosphor was successfully prepared through the conventional high-temperature solid state reaction in air atmosphere, and the crystal structure and luminescence properties were investigated in detail. The phosphor is confirmed to crystallize into the double-perovskite structure corresponding to the monoclinic system with space group P21/c. Upon 355 nm excitation, the phosphor exhibits bright deep-red emission band in the range of 630-750 nm with a maximum of 680 nm attributed to the 2Eg -> 4A2g transition of Mn4+. The optimal doping concentration of Mn4+ is 0.4 mol%. The CIE color coordinates are (0.717, 0.283) and the internal quantum efficiency is 23.1%, which indicates that the Ca2YNbO6:Mn4+ is a promising deep-red phosphor for the plant cultivation lighting field.
palavras-chave
LUMINESCENCE PROPERTIES; EMISSION ENHANCEMENT; THERMAL-STABILITY; EMITTING PHOSPHOR; COLOR CONVERTER; ENERGY-TRANSFER; MN4+; BA3CANB2O9; MECHANISM; DESIGN
categoria
Chemistry
autores
Cao, ZY; Dong, SJ; Shi, SK; Wang, JY; Fu, LS
nossos autores
Lianshe Fu
Investigador AuxiliarProjectos
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
agradecimentos
Y This work was financially supported by Natural Science Foundation of China (51972097) and Science Foundation of Hebei Normal University, China (L2019K11). This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDP/50011/2020&UIDB/50011/2020, financed by national funds through the Foundation for Science and Technology/MCTES.