JP2015130319A5 - LIGHT EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Google Patents

LIGHT EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Download PDF

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JP2015130319A5
JP2015130319A5 JP2014135607A JP2014135607A JP2015130319A5 JP 2015130319 A5 JP2015130319 A5 JP 2015130319A5 JP 2014135607 A JP2014135607 A JP 2014135607A JP 2014135607 A JP2014135607 A JP 2014135607A JP 2015130319 A5 JP2015130319 A5 JP 2015130319A5
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light emitting
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emitting element
light
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第１の発光素子及び第２の発光素子を有し、A first light emitting element and a second light emitting element;
前記第１の発光素子及び前記第２の発光素子はそれぞれ、第１の電極と、前記第１の電極上の第１のＥＬ層と、前記第１のＥＬ層上の電荷発生層と、前記電荷発生層上の第２のＥＬ層と、前記第２のＥＬ層上の第２の電極と、を有し、Each of the first light emitting element and the second light emitting element includes a first electrode, a first EL layer on the first electrode, a charge generation layer on the first EL layer, A second EL layer on the charge generation layer; and a second electrode on the second EL layer;
前記第１の電極は、反射電極からなり、The first electrode comprises a reflective electrode;
前記第２の電極は、半透過電極または半反射電極からなり、The second electrode comprises a semi-transmissive electrode or a semi-reflective electrode,
前記第１の電極と前記第２の電極との光学距離は、前記第１の発光素子と前記第２の発光素子とで異なり、The optical distance between the first electrode and the second electrode is different between the first light emitting element and the second light emitting element,
前記第２のＥＬ層の発光領域と前記第２の電極との光学距離は、前記第１の発光素子と前記第２の発光素子とで同じであり、The optical distance between the light emitting region of the second EL layer and the second electrode is the same between the first light emitting element and the second light emitting element,
前記第２のＥＬ層の発光領域と前記第２の電極との光学距離が、前記第２のＥＬ層の発光領域で発光する光の波長に対してλ／４未満であることを特徴とする発光装置。The optical distance between the light emitting region of the second EL layer and the second electrode is less than λ / 4 with respect to the wavelength of light emitted from the light emitting region of the second EL layer. Light emitting device. 第１の発光素子及び第２の発光素子を有し、A first light emitting element and a second light emitting element;
前記第１の発光素子及び前記第２の発光素子はそれぞれ、第１の電極と、前記第１の電極上の第１のＥＬ層と、前記第１のＥＬ層上の電荷発生層と、前記電荷発生層上の第２のＥＬ層と、前記第２のＥＬ層上の第２の電極と、を有し、Each of the first light emitting element and the second light emitting element includes a first electrode, a first EL layer on the first electrode, a charge generation layer on the first EL layer, A second EL layer on the charge generation layer; and a second electrode on the second EL layer;
前記第１の電極は、反射電極からなり、The first electrode comprises a reflective electrode;
前記第２の電極は、半透過電極または半反射電極からなり、The second electrode comprises a semi-transmissive electrode or a semi-reflective electrode,
前記第１の電極と前記第２の電極との光学距離は、前記第１の発光素子と前記第２の発光素子とで異なり、The optical distance between the first electrode and the second electrode is different between the first light emitting element and the second light emitting element,
前記第１の発光素子の前記第１の電極と前記第２の電極との光学距離が、前記第１の発光素子から取り出す光の波長に対して、ｍλ／２（ただし、ｍは自然数）であり、The optical distance between the first electrode and the second electrode of the first light emitting element is mλ / 2 (where m is a natural number) with respect to the wavelength of light extracted from the first light emitting element. Yes,
前記第２のＥＬ層の発光領域と前記第２の電極との光学距離は、前記第１の発光素子と前記第２の発光素子とで同じでありThe optical distance between the light emitting region of the second EL layer and the second electrode is the same between the first light emitting element and the second light emitting element.
前記第２のＥＬ層の発光領域と前記第２の電極との光学距離が、前記第２のＥＬ層の発光領域で発光する光の波長に対してλ／４未満であることを特徴とする発光装置。The optical distance between the light emitting region of the second EL layer and the second electrode is less than λ / 4 with respect to the wavelength of light emitted from the light emitting region of the second EL layer. Light emitting device. 請求項１乃至請求項２のいずれか一において、In any one of Claims 1 to 2,
前記第１のＥＬ層は、青色発光を呈する発光層を有し、The first EL layer has a light emitting layer that emits blue light,
前記第２のＥＬ層は、赤色発光を呈する発光層と、緑色発光を呈する発光層とが積層された構造を有することを特徴とする発光装置。The second EL layer has a structure in which a light emitting layer that emits red light and a light emitting layer that emits green light are stacked. 請求項１乃至請求項２のいずれか一において、In any one of Claims 1 to 2,
前記第１のＥＬ層は、青色蛍光発光を呈する発光層を有し、The first EL layer has a light emitting layer exhibiting blue fluorescent light emission,
前記第２のＥＬ層は、赤色燐光発光を呈する発光層と、緑色燐光発光を呈する発光層とが積層された構造を有することを特徴とする発光装置。The light emitting device, wherein the second EL layer has a structure in which a light emitting layer that emits red phosphorescence and a light emitting layer that emits green phosphorescence are stacked. 請求項１乃至請求項４のいずれか一において、In any one of Claims 1 thru | or 4,
前記第１の発光素子からは赤色発光、緑色発光または青色発光のいずれかひとつが得られ、From the first light emitting element, any one of red light emission, green light emission, and blue light emission is obtained,
前記第２の発光素子からは白色発光が得られることを特徴とする発光装置。White light emission is obtained from the second light emitting element. 請求項１乃至請求項５のいずれか一に記載の発光装置を用いた電子機器。 An electronic apparatus using the light emitting device according to claim 1 . 請求項１乃至請求項５のいずれか一に記載の発光装置を用いた照明装置。 An illumination device using the light emitting device according to any one of claims 1 to 5 .
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