A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires
- Authors
- Lee, Keunsoo; Skin, Jin-Wook; Park, Jun-Hwan; Lee, Jonghee; Joo, Chul Woong; Lee, Jeon-Ik; Cho, Doo-Hee; Lim, Jong Tae; Oh, Min-Cheol; Ju, Byeong-Kwon; Moon, Jaehyun
- Issue Date
- 13-7월-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- organic light-emitting diodes; light extraction; silver nanowires; wrinkle structures; finite difference time domain
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.27, pp.17409 - 17415
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 27
- Start Page
- 17409
- End Page
- 17415
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/88068
- DOI
- 10.1021/acsami.6b02924
- ISSN
- 1944-8244
- Abstract
- We propose and fabricate a random light scattering layer for light extraction in organic light-emitting diodes (OLEDs) with silver nanodots, which were obtained by melting silver nanowires. The OLED with the light scattering layer as an internal light extraction structure was enhanced by 49.1% for the integrated external quantum efficiency (EQE). When a wrinkle structure is simultaneously used for an external light extraction structure, the total enhancement of the integrated EQE was 65.3%. The EQE is maximized to 65.3% at a current level of 2.0 mA/cm(2). By applying an internal light scattering layer and wrinkle structure to an OLED, the variance in the emission spectra was negligible over a broad viewing angle. Power mode analyses with finite difference time domain (FDTD) simulations revealed that the use of a scattering layer effectively reduced the waveguiding mode while introducing non-negligible absorption. Our method offers an effective yet simple approach to achieve both efficiency enhancement and spectral stability for a wide range of OLED applications.
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