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Proceedings Paper

Enhanced outcoupling of light from OLEDs fabricated on corrugated polycarbonate and PET substrates (Conference Presentation)
Author(s): Chamika Hippola; Rajiv Kaudal; Eeshita Manna; Thomas Trovato; Dennis Slafer; Rana Biswas; Joseph Shinar; Ruth Shinar
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Paper Abstract

Extracting the “internally waveguided” light from OLEDs, which together with losses to plasmons at the metal cathode typically account for > 50% of the light generated in the emission zone, has proven to be a particularly challenging problem. To address this problem, we fabricated devices on nano-patterned plastic substrates that disrupt the internal waveguiding. We describe thermally evaporated small molecule fluorescent and phosphorescent OLEDs fabricated on corrugated polycarbonate (PC) and polyethylene terephthalate (PET) substrates nanopatterned in a roll-to-roll process. We compare the devices fabricated on plastic/ITO to those on plastic/PEDOT:PSS and the effect of adding a µm-scale Cu honeycomb mesh to the integrated substrate/anode as well. Depending on the height and pitch of the pattern, up to a 2.5 fold increase in the outcoupling factor is observed relative to the flat substrate. Issues related to the fidelity of the conformal deposition of the various layers on the patterned plastic are also discussed, particularly the effect of the nanopatterns on device stability.

Paper Details

Date Published: 19 September 2017
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Proc. SPIE 10362, Organic Light Emitting Materials and Devices XXI, 103620I (19 September 2017); doi: 10.1117/12.2275053
Show Author Affiliations
Chamika Hippola, Iowa State Univ. of Science and Technology (United States)
Rajiv Kaudal, Iowa State Univ. of Science and Technology (United States)
Eeshita Manna, Iowa State Univ. of Science and Technology (United States)
Thomas Trovato, Trovato Mfg., Inc. (United States)
Dennis Slafer, MicroContinuum, Inc. (United States)
Rana Biswas, Iowa State Univ. of Science and Technology (United States)
Joseph Shinar, Iowa State Univ. of Science and Technology (United States)
Ruth Shinar, Iowa State Univ. of Science and Technology (United States)


Published in SPIE Proceedings Vol. 10362:
Organic Light Emitting Materials and Devices XXI
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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