PROBLEM TO BE SOLVED: To provide a light emitting element capable of achieving a high light emission efficiency and performing high color reproducibility under application to a display or the like even when a light emission material having a relatively low light absorption efficiency is used, and a display and a luminaire that use the light emission element.SOLUTION: A light emitting element includes an exciting light source for emitting primary light, a light emission layer for absorbing the primary light and emitting secondary light, and a metallic particle aggregate layer. The metallic particle aggregate layer is obtained by thirty or more metallic particles that are two-dimensionally arranged to be spaced from one another. The average particle diameter of the metallic particles ranges from 200 to 1600 nm, the average height ranges from 55 to 500 nm, the aspect ratio defined by the ratio of the average particle diameter to the average height ranges from 1 to 8, and the average distance between adjacent metallic particles ranges from 1 to 150 nm. Mixture light of a part of the primary light and at least a part of the secondary light is emitted from the light emitting element. A display and a luminaire use the light emitting element.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】光吸収効率の比較的低い発光材料を用いる場合であっても、ディスプレイなどに適用したときに高い発光効率及び色再現性を示すことができる発光素子、並びにこれを用いたディスプレイ及び照明装置を提供する。【解決手段】1次光を発する励起光源と該1次光を吸収して2次光を発する発光層と金属系粒子集合体層とを含み、金属系粒子集合体層は、30個以上の金属系粒子が互いに離間して二次元的に配置されてなり、金属系粒子の平均粒径が200~1600nmの範囲内、平均高さが55~500nmの範囲内、平均高さに対する平均粒径の比で定義されるアスペクト比が1~8の範囲内、隣り合う金属系粒子間の平均距離が1~150nmの範囲内であり、1次光の一部と2次光の少なくとも一部との混合光を出射する発光素子、並びにこれを用いたディスプレイ及び照明装置である。【選択図】図1
