近日，研究生熊如梦在Inorganic Chemistry发表题为“Regulation of the Crystal Structure and Luminescence Properties of a BaLa_1.6ZnO₅:0.4Eu³⁺ Phosphor by Gd³⁺-Mg²⁺ Codoping for Solar Energy Utilization”的学术论文，通讯作者为廉世勋教授。

论文摘要：Converting solar UV to red/far-red (VTR/FR) light can boost crop photosynthesis and morphogenesis. Consequently, broadband ultraviolet excitation and red/far-red emission phosphors are important VTR/FR light-conversion auxiliaries (LCAs) in solar greenhouses and solar cells. In this study, we have designed and synthesized a series of solid solution BaLa2- x-y Gd y Zn1-z Mg z O5:xEu3+ phosphors. A Gd3+-Mg2+ cosubstituted La3+-Zn2+ strategy has been employed to regulate the crystal structure and local crystal field strength of the solid solution. At a low level of Gd3+-Mg2+ doping, the phosphor exhibited a tetragonal symmetric (BaLa2ZnO5) structure and an I4/mcm space group. The Eu3+ 5D0 -> 7F4 transition generated intense far-red (706 nm) luminescence. At higher doping levels, the crystal structure switched to an orthorhombic low-symmetry (BaGd2ZnO5) Pbnm space group and 5D0 -> 7F2 transition with a red emission at 627 nm. The optimized tetragonal BaLa0.8Gd0.8Zn0.89Mg0.11O5:0.4Eu3+ phosphor exhibited effective UVA excitation with a far-red emission (706 nm) and high external/internal quantum efficiency (EQE/IQE = 46.3/88.7%). The optimized orthorhombic BaLa0.2Gd1.4Zn0.3Mg0.7O5:0.4Eu3+ phosphor exhibited UVB excitation with a red emission (627 nm) and EQE/IQE = 46.4/94.3%. The luminescent film laminated glasses (LFLGs) made with the two phosphors had good VTR/FR performance in sunlight, showing potential in greenhouse and solar cell applications.

论文链接：https://pubs.acs.org/doi/10.1021/acs.inorgchem.5c00963