A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires

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

Research output: Contribution to journalArticle

30 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)17409-17415
Number of pages7
JournalACS Applied Materials and Interfaces
Volume8
Issue number27
DOIs
Publication statusPublished - 2016 Jul 13

Keywords

  • finite difference time domain
  • light extraction
  • organic light-emitting diodes
  • silver nanowires
  • wrinkle structures

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires'. Together they form a unique fingerprint.

  • Cite this

    Lee, K., Shin, J. W., Park, J. H., Lee, J., Joo, C. W., Lee, J. I., Cho, D. H., Lim, J. T., Oh, M. C., Ju, B. K., & Moon, J. (2016). A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires. ACS Applied Materials and Interfaces, 8(27), 17409-17415. https://doi.org/10.1021/acsami.6b02924