Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate

Tong, Kwing; Liu, Xiaofeng; Zhao, Fangchao; Chen, Dustin; Pei, Qibing

doi:10.1002/adom.201700307

Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate

Journal Article · Tue Jul 18 00:00:00 EDT 2017 · Advanced Optical Materials

DOI:https://doi.org/10.1002/adom.201700307· OSTI ID:1429113

Tong, Kwing ^[1]; Liu, Xiaofeng ^[2]; Zhao, Fangchao ^[2]; Chen, Dustin ^[2]; Pei, Qibing ^[2]

Univ. of California, Los Angeles, CA (United States). Henry Samueli School of Engineering and Applied Science and Dept. of Materials Science and Engineering; UCLA
Univ. of California, Los Angeles, CA (United States). Henry Samueli School of Engineering and Applied Science and Dept. of Materials Science and Engineering

A flexible, nanocomposite substrate for maximizing light outcoupling efficiencies of organic light-emitting diodes (OLEDs) is introduced. In depth investigation is performed on designing the integrated strategy based on considerations of surface conductivity, microcavity tuning, and internal light scattering. The resulting nanocomposite substrate consists of silver nanowires as the electrode and a high-index polymer layer and a light-scattering layer for light extraction. It is able to outcouple both the waveguide and the substrate modes, two modes accounting for significant losses in OLED device efficiency. With enhanced light outcoupling, white OLEDs subsequently fabricated on the nanocomposite substrates demonstrate performance metrics of 107 lm W^-1 power efficiency and 49% external quantum efficiency at 1000 cd m^-2. Thus, the nanocomposite substrate is fabricated by solution processes at low temperatures for potentially low manufacturing cost.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0006674

OSTI ID:: 1429113

Alternate ID(s):: OSTI ID: 1390639

Journal Information:: Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 18 Vol. 5; ISSN 2195-1071

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
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Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate

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