Organic wrinkles embedded in high-index medium as planar internal scattering structures for organic light-emitting diodes

Cited 7 time in webofscience Cited 0 time in scopus
  • Hit : 244
  • Download : 0
Organic wrinkle structures are investigated as an internal scattering layer for the fabrication of highly efficient organic light-emitting diodes (OLEDs). The solution-processed wrinkle structures are planarized with a high-index layer, resulting in a reduced surface roughness and optical haze simultaneously. The OLED device including the wrinkle structures achieved external quantum efficiency (EQE) of 24.2%, corresponding to a 1.24 time enhancement with respect to that of a control device having no internal scattering layer. By attaching a micro lens array (MLA) or a half ball lens (HBL) on the external surface of the substrate, the proposed device exhibits an EQE of 30.5% (1.56 time enhancement) and 41.8% (2.14 time enhancement), respectively. Randomness of the distributed wrinkle structures is shown to provide additional benefits of reduced angular spectral distortion and Lambertian-like emission properties. Trans-scale optical simulation combining wave-optics and the geometrical effect are used for the quantitative analysis of the emission characteristics of the device. (C) 2017 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-07
Language
English
Article Type
Article
Keywords

OUT-COUPLING EFFICIENCY; PHOSPHORESCENT EMITTERS; QUANTUM EFFICIENCY; LOW HAZE; EXTRACTION; LAYER; POLYMER; DEVICE; OLEDS; GAP

Citation

ORGANIC ELECTRONICS, v.46, pp.139 - 144

ISSN
1566-1199
DOI
10.1016/j.orgel.2017.03.040
URI
http://hdl.handle.net/10203/224709
Appears in Collection
EE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 7 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0