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A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires
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- Authors
- Keunsoo Lee, Jin-Wook Shin, Jun-Hwan Park, Jonghee Lee, Chul Woong Joo, Jeong-Ik Lee, Doo-Hee Cho, Jong Tae Lim, Min-Cheol Oh, Byeong-Kwon Ju, Jaehyun Moon
- Issue Date
- 2016-06
- Citation
- ACS Applied Materials & Interfaces, v.8, no.27, pp.17409-17415
- ISSN
- 1944-8244
- Publisher
- American Chemical Society(ACS)
- Language
- English
- Type
- Journal Article
- 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/cm2. 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.
- KSP Keywords
- External Quantum Efficiency, External light, Extraction structure, Finite Difference Time Domain(FDTD), Organic light-emitting diodes(OLEDS), Power mode, Silver nanowires(AgNWs), Spectral stability, Wide range, efficiency enhancement, emission spectra