ORGANIC LIGHT EMITTING DIODE AND LIGHT EMITTING ELEMENT

WIPO Patent Application WO/2011/074491

A1

In a conventional organic light emitting diode (30), part of light (35) generated in an organic light emitting layer (33) is repeatedly fully reflected by a boundary between a transparent substrate (31) and the outside and a boundary between the transparent substrate (31) and a transparent electrode layer (32), and emitted to the outside from side surfaces (31a, 31b) of the transparent substrate (31). The conventional organic light emitting diode (30) has low light extraction efficiency. Disclosed is an organic light emitting diode (10), wherein in a transparent substrate (11) used therein, the length of a side (11a) (upper side) on the transparent electrode layer (12) side is shorter than the length of a side (11b) (lower side) on the emission side in a cross section parallel to a short side (16). The ends (11c, 11d) of the side (11a) (upper side) on the transparent electrode layer (12) side and the ends (11e, 11f) of the side (11b) (lower side) on the emission side are connected by straight lines or curved lines. The angles (α, β) formed by side surfaces (11g, 11h) of the transparent substrate (11) and the side (11b) (lower side) on the emission side are larger than 0° and smaller than 90°.

KAKIUCHI RYOHEI (JP)
NAKAI TAKAHIRO (JP)
YOSHIKAWA JIN (JP)
JUNI NORIYUKI (JP)

PCT/JP2010/072232

June 23, 2011

December 10, 2010

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NITTO DENKO CORP (JP)
KAKIUCHI RYOHEI (JP)
NAKAI TAKAHIRO (JP)
YOSHIKAWA JIN (JP)
JUNI NORIYUKI (JP)

H05B33/02; H01L51/50

JP2005327686A	2005-11-24
JP2006064911A	2006-03-09
JP2007536708A	2007-12-13
JP2004063404A	2004-02-26

KUSUMOTO, Takayoshi (JP)
Takayoshi Kusumoto (JP)

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