Strong Exciton-photon Coupling in Organic Microcavity Electroluminescence Devices with Thiophene/Phenylene Co-oligomer Derivatives

• Dokiya, Shohei

• Mizuno, Hideyuki

• Mizuno, Hitoshi

• Katsuki, Hiroyuki

• Yamashita, Kenichi

• Sasaki, Fumio

• Yanagi, Hisao

Abstract

Organic electroluminescence (EL) devices with surface-emitting microcavity structure were fabricated using vapor-deposited films of thiophene/phenylene co-oligomer derivatives, aiming at polariton formation under electrical excitation. Owing to strong coupling between excitons and photons in the device, we demonstrated the formation of cavity polaritons with a large Rabi-splitting energy (2?Ω = 250 meV). Furthermore, efficient relaxation into the bottom of lower polariton branch was confirmed from angle-resolved EL spectra. In excitation-density dependence, the luminance of microcavity EL devices showed a superlinear increase with an elevation of current density indicating a contribution of triplet excitons.

Journal

• Applied Physics Express

  Applied Physics Express 12 111002-, 2019-10-10

  The Japan Society of Applied Physics

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1050295834375973120
• NII Article ID: 120006766862
• NII Article ID: 210000157189
• ISSN: 18820786
• ISSN: 18820778
• ISSN: http://id.crossref.org/issn/18820786
• DOI: 10.7567/1882-0786/ab47b9
• HANDLE: 10061/13415
• Web Site: https://naist.repo.nii.ac.jp/records/9814
• Web Site: http://iopscience.iop.org/article/10.7567/1882-0786/ab47b9
• Web Site: http://iopscience.iop.org/article/10.7567/1882-0786/ab47b9/pdf
• Web Site: https://iopscience.iop.org/article/10.7567/1882-0786/ab47b9/pdf
• Web Site: https://iopscience.iop.org/article/10.7567/1882-0786/ab47b9
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN