Organic light emitting device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016005993-A1
Application number	US-201514857307-A
Country	US
Kind code	A1
Filing date	Sep 17, 2015
Priority date	Apr 1, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

Disclosed is an organic light emitting device (OLED) that may include a first electrode including at least two conductive units, each of the at least two conductive units connected to a conductive connector of the first electrode; a second electrode facing the first electrode; a current carrying electrode electrically connected to the at least two conductive units, wherein the current carrying electrode includes a current carrying portion of the first electrode connected to the conductive connector of each of the at least two conductive units or an auxiliary electrode formed of a material different from that of the first electrode; and an organic layer between the first electrode and the second electrode; wherein the conductive connector includes an area in which a length of a direction, in which a current substantially flows, is at least ten times longer than a width of a direction vertical to the length of the direction, and wherein a resistance of the conductive connector is 400 Ω or more and 300,000 Ω or less.

First claim

1 . An organic light emitting device (OLED), comprising:
a first electrode including at least two conductive units, each of the at least two conductive units connected to a conductive connector of the first electrode; a second electrode facing the first electrode; a current carrying are electrically connected to the at least two conductive units, wherein the current carrying electrode includes a current carrying portion of the first electrode connected to the conductive connector of each of the at least two conductive units or an auxiliary electrode formed of a material different from that of the first electrode, and an organic layer between the first electrode and the second electrode wherein the conductive connector includes an area in which a length of a direction, in which a current substantially flows, is at least ten times longer than a width of a direction vertical to the length of the direction, and wherein a resistance of the conductive connector is 400Ω or more and 300,000Ω or less.

2 . The OLED according to claim 1 , wherein the at least two conductive units are electrically connected to each other in parallel.

3 . The OLED according to claim 1 , wherein the current carrying electrode is a combination of the current carrying portion of the first electrode and the auxiliary electrode.

4 . The OLED according to claim 1 , wherein at current density of any one value of 1 mA/cm 2 to 5 mA/cm 2 , the conducive connector has a resistance value at which an operating voltage increase rate of the following Formula 1 and a numerical value of operating current to leakage current of the following Formula 2 simultaneously satisfy 0.03 or less:

V
t

-

V
o

V
o

[

Formula



1

]

I
s

I
t

[

Formula



2

]

wherein V t (V) denotes operating voltage of the OLED to which the conductive connector is applied and in which a short-circuit defect is absent,
V o (V) denotes an operating voltage of the OLED to which the conductive connector is not applied and in which the short-circuit defect is absent,
I t (mA) denotes an operating current of the OLED to which the conductive connector is applied and in which the short-circuit defect is absent, and
I s (mA) denotes a leakage current of the OLED to which the conductive connector is applied and in which the short-circuit defect is present in any one conductive unit.

5 . The OLED according to claim 1 , wherein resistance of the conductive connector is 1,000Ω or more and 300,000Ω or less.

6 . The OLED according to claim 1 , wherein the first electrode includes at least 1,000 conductive units separate from each other.

7 . The OLED according to claim 1 , wherein an area of each conductive unit is 0.01 mm 2 or more and 25 mm 2 or less.

8 . The OLED according to claim 1 , wherein a surface resistance of the conductive unit is 1Ω/□ or more.

9 . The OLED according to claim 1 , a wherein resistance from the one conductive unit to another conductive unit adjacent thereto is at least twofold of a resistance of the conductive connector.

10 . The OLED according to claim 1 , wherein a resistance from the one conductive unit to another conductive unit adjacent thereto is 800Ω or more and 600,000Ω or less.

11 . The OLED according to claim 1 , wherein a material of the conductive connector is the same as a material of the conductive unit.

12 . The OLED according to claim 1 , wherein the current carrying electrode is provided to be separate from the conductive unit.

13 . The OLED according to claim 1 , wherein a surface resistance of the auxiliary electrode is 3Ω/□ or less.

14 . The OLED according to claim 1 , wherein at least one area of each conductive unit is positioned on a light emitting area of the OLED.

15 . The OLED according to claim 3 , wherein the current carrying portion of the first electrode, the auxiliary electrode, and the conductive connector are provided in a non-emitting area of the OLED.

16 . The OLED according to claim 1 , wherein an occupying area of the conductive units in the OLED is 50% or more and 90% or less based on a top view of an entire OLED.

17 . The OLED according to claim 3 , further comprising:
a short-circuit preventing layer between the first electrode and the auxiliary electrode.

18 . The OLED according to claim 17 , wherein a resistance from the auxiliary electrode to the first electrode is 400Ω or more and 300,000Ω or less.

19 . The OLED according to claim 17 , wherein the auxiliary electrode is electrically connected to the conductive connector through the short-circuit preventing layer.

20 . The OLED according to claim 17 , wherein the short-circuit preventing layer is provided on at least one surface of the auxiliary electrode in contact therewith.

21 . The OLED according to claim 17 , wherein the short-circuit preventing layer is provided on a top surface, a bottom surface, or a side surface on which the auxiliary electrode is formed.

22 . The OLED according to claim 17 , wherein a thickness of the short-circuit preventing layer is 1 nm or more and 10 μm or less.

23 . The OLED according to claim 17 , wherein a volume resistivity of the short-circuit preventing layer is 0.63Ω cm or more and 8.1×10 10 Ω cm or less.

24 . The OLED according to claim 17 , wherein the short-circuit preventing layer includes one or more selected from a group consisting of a carbon powder; a carbon film; a conductive polymer; an organic polymer; a metal; a metal oxide; an inorganic oxide; a metal sulfide; and an insulating material.

25 . The OLED according to claim 1 , wherein the first electrode is a transparent electrode.

26 . The OLED according to claim 3 , wherein the auxiliary electrode is a metal electrode.

27 . The OLED according to claim 3 , wherein the auxiliary electrode includes conductive lines electrically connected to each other.

28 . The OLED accordi

Assignees

• Lg Chemical Ltd

Inventors

• Lee Yeon Keun
• Park Sang Jun
• Kim Yongnam

Classifications

• H10K59/877

  comprising scattering means · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/814

  combined with auxiliary electrodes, e.g. ITO layer combined with metal lines · CPC title

• H10K59/80516 Primary

  combined with auxiliary electrodes, e.g. ITO layer combined with metal lines · CPC title

• H01L51/5212 Primary

  Electricity · mapped topic