Organic electroluminescent element and lighting device
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United States of America Patent
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Nov 1, 2016
Grant Date -
Jul 23, 2015
app pub date -
Jun 24, 2013
filing date -
Jun 27, 2012
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Abstract
Provided is an organic electroluminescent element that can obtain white light with excellent color rendering properties and is particularly suitable for a light source of a lighting device. The organic electroluminescent element includes a plurality of light emitting units that are provided between a cathode and an anode and include at least a light emitting layer made of an organic compound. White light emitted from the plurality of light emitting units has a continuous emission spectrum (S) in a wavelength range of at least 380 nm to 780 nm. The emission spectrum (S) includes one peak wavelength (p1) in a red wavelength range (R) of 600 nm to 640 nm, one peak wavelength (p2) in a green wavelength range G of 500 nm to 540 nm, and two peak wavelengths (p3) and (p4) in a blue wavelength range B of 440 nm to 490 nm.
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