PROBLEM TO BE SOLVED: To provide a luminescent device and an LED source for plant cultivation which can readily control a ratio of quantity of light between a blue region and a red region with a simple configuration, without increasing an installation area.SOLUTION: A luminescent device comprises at least one blue LED chip (2) which has a luminescence peak of wavelength in the region of 400-480 nm to correspond to a blue region absorption peak of chlorophyll, a red phosphor (7b) which emits a light having a luminescence peak of wavelength of 620-700 nm by excitation light from the blue LED chip (2) to correspond to a red region absorption peak of chlorophyll, and a resin layer (7) in which the red phosphor (7b) and a green phosphor (7c) are mixed and dispersed, covering the blue LED chip (2). The red phosphor (7b) comprises at least either one of CaAlSiN3:Eu or (Sr, Ca) AlSiN3:Eu.COPYRIGHT: (C)2015,JPO&INPIT【課題】設置面積を増大させることなく、簡単な構成で青色域と赤色域との光量割合を容易に調整し得る発光装置及び植物栽培用LED光源を提供する。【解決手段】発光装置は、クロロフィルの青色域吸収ピークに対応すべく波長が400~480nmの範囲で発光ピークを有する少なくとも1個の青色LEDチップ(2)と、青色LEDチップ(2)からの励起光により、クロロフィルの赤色域吸収ピークに対応すべく発光ピークが波長620~700nmの光を発光する赤蛍光体(7b)と、青色LEDチップ(2)を覆う、赤蛍光体(7b)と緑蛍光体(7c)とを混合分散した樹脂層(7)とが設けられている。赤蛍光体(7b)は、CaAlSiN3:Eu又は(Sr,Ca)AlSiN3:Euの少なくとも一方を含む。【選択図】図7
