ORGANIC LIGHT EMITTING DIODE AND LIGHT EMITTING ELEMENT

摘要

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 (a, ß) 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°.