Display device
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United States of America Patent
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Sep 15, 2020
Grant Date -
Sep 12, 2019
app pub date -
Feb 25, 2019
filing date -
Mar 7, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a display device having first to third light-emitting elements. The first to third light-emitting elements each include: a first electrode; a hole-transporting layer over the first electrode; an emission layer over the hole-transporting layer; a hole-blocking layer over and in contact with the emission layer; an electron-transporting layer over and in contact with the hole-blocking layer; and a second electrode over the electron-transporting layer. An emission wavelength of the second light-emitting element is longer than that of the first light-emitting element and shorter than that of the third light-emitting element. A total thickness of the hole-blocking layer and the electron-transporting layer in the second light-emitting element is larger than that in the first light-emitting element and smaller than that in the third light-emitting element. A thickness of the hole-blocking layer is larger than that of the electron-transporting layer in each of the first to third light-emitting elements.
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