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Dual pattern for enhancing light extraction efficiency of white organic light-emitting diodes
- Authors
- Kim, Kwan; Han, Kyoung-Hoon; Kim, Yang-Doo; Huh, Daihong; Han, Yoonjay; Lee, Heon; Kim, Jang-Joo
- Issue Date
- 6월-2018
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Nanoimprint lithography; OLED; 3-D structure; External scattering layer; Nano and micro pattern; Light extraction efficiency
- Citation
- ORGANIC ELECTRONICS, v.57, pp.201 - 205
- Indexed
- SCIE
SCOPUS
- Journal Title
- ORGANIC ELECTRONICS
- Volume
- 57
- Start Page
- 201
- End Page
- 205
- ISSN
- 1566-1199
- Abstract
- Nano and micro-patterns (dual patterns) were introduced on a glass substrate as an extraction layer to enhance the light extraction efficiency of white organic light-emitting diodes (WOLEDs). The dual-patterned glass was fabricated by thermal evaporation, direct printing, and reactive ion etching. The combination of nano- and micro-structures imparted highest current density and luminance to the dual-patterned WOLED without electrical degradation. Additionally, the dual-patterned WOLED exhibited higher current and power efficiencies compared to that of the nano- and micro-patterned WOLEDs, which increased by 21% and 27% at 1 mA/cm(2), respectively, as compared to that of the reference.
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