Title:
ORGANIC EL DEVICE
Document Type and Number:
Japanese Patent JP2014175262
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an organic EL device having high light extraction efficiency and high illuminance as compared with a conventional device.SOLUTION: A transparent electrode layer 4, when a maximum thickness is represented by Dmax and a minimum thickness is represented by Dmin, is 0.1 or less in (Dmax-Dmin)/(Dmax+Dmin). A reverse-side electrode layer 6 is formed with silver. Between a transparent substrate 2 and the transparent electrode layer 4 is interposed a surface concavo-convex layer 3 having an uneven surface 7 on the transparent electrode layer 4-side surface, the average pitch of the uneven surface 7 being greater than 200 nm and equal to or less than 1 μm, the difference of elevation of the uneven surface 7 being greater than or equal to 200 nm and smaller than the average pitch. The surface concavo-convex layer 3 is formed with a transparent oxide having an intermediate index of refraction between the transparent substrate 2 and the transparent electrode layer 4, and has an average thickness of 1 μm or greater. A portion of a function layer 5 closest to the transparent substrate 2 in the thickness direction is located closer to the transparent substrate 2 side than a portion of the transparent electrode layer 4 farthest from the transparent substrate 2 is.
Inventors:
MISHIMA SUZUSHI
Application Number:
JP2013049633A
Publication Date:
September 22, 2014
Filing Date:
March 12, 2013
Export Citation:
Assignee:
KANEKA CORP
International Classes:
H05B33/02; H01L51/50; H05B33/28
Domestic Patent References:
| JP2012174410A | 2012-09-10 | |||
| JP2002280164A | 2002-09-27 |
Foreign References:
| WO2012133414A1 | 2012-10-04 | |||
| WO2012077738A1 | 2012-06-14 |
Attorney, Agent or Firm:
Takashi Fujita