PHOSPHOR COMPRISING RARE EARTH METAL, LIGHT EMITTING COMPOSITION COMPRISING THE SAME, AND PRODUCTION METHOD THEREOF, AND LIGHT EMITTER COMPRISING PHOSPHOR

摘要

PROBLEM TO BE SOLVED: To provide a phosphor excellent in light emitting intensity and light emitting efficacy, which can excite with an excitation light having a wavelength longer than before; a light emitting composition comprising the same; and a light emitter using the same.SOLUTION: A phosphor consists of a rare earth metal and a phosphine oxide ligand or phosphinic acid ligand comprising two phosphine oxide structures or phosphinic acid structures, where they are bound to each other with a group having a siloxane bond having alkylene groups at both terminals. A light emitting composition comprises it. This phosphor can be produced by reacting a compound having a siloxane bond to a rare earth complex coordinated with a phosphine oxide.