LIGHT EMITTING DEVICE AND LIGHTING DEVICE USING SAME

摘要

PROBLEM TO BE SOLVED: To provide a light emitting device combining a first luminous body (excitation source) generating light of 350 to 415 nm with a second luminous body (phosphor) with high emission intensity.

SOLUTION: This light emitting device fulfills the following conditions (A) and/or (B) in a device combining a first luminous body (excitation source) generating the light of 350 to 415 nm with a second luminous body (phosphor). (A) The quantum absorption efficiency αqof the phosphor is 0.8 or more. (B) The product αq×ηiof the quantum absorption efficiency αqof the phosphor and the internal quantum efficiency ηiis 0.55 or more.

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