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

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.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ. of California, Los Angeles, CA (United States). Henry Samueli School of Engineering and Applied Science and Dept. of Materials Science and Engineering
Publication Date:
Grant/Contract Number:
EE0006674
Type:
Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 18; Journal ID: ISSN 2195-1071
Publisher:
Wiley
Research Org:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; OLED; substrate; transparent electrode; lighting; composite materials; electronic strucutres; flexible electronics; organic light-emitting diodes
OSTI Identifier:
1429113
Alternate Identifier(s):
OSTI ID: 1390639

Tong, Kwing, Liu, Xiaofeng, Zhao, Fangchao, Chen, Dustin, and Pei, Qibing. Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate. United States: N. p., Web. doi:10.1002/adom.201700307.
Tong, Kwing, Liu, Xiaofeng, Zhao, Fangchao, Chen, Dustin, & Pei, Qibing. Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate. United States. doi:10.1002/adom.201700307.
Tong, Kwing, Liu, Xiaofeng, Zhao, Fangchao, Chen, Dustin, and Pei, Qibing. 2017. "Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate". United States. doi:10.1002/adom.201700307. https://www.osti.gov/servlets/purl/1429113.
@article{osti_1429113,
title = {Efficient Light Extraction of Organic Light-Emitting Diodes on a Fully Solution-Processed Flexible Substrate},
author = {Tong, Kwing and Liu, Xiaofeng and Zhao, Fangchao and Chen, Dustin and Pei, Qibing},
abstractNote = {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.},
doi = {10.1002/adom.201700307},
journal = {Advanced Optical Materials},
number = 18,
volume = 5,
place = {United States},
year = {2017},
month = {7}
}

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