Development and Photoluminescence Properties of Dinuclear Eu(III)-β-Diketonates with a Branched Tetraphosphine Tetraoxide Ligand for Potential Use in LEDs as Red Phosphors. - Hiroki Iwanaga; Fumihiko Aiga; Shin-ichi Sasaoka; Takahiro Wazaki (IEICE Trans. Electron., 2024)