A spirofluorene-end-capped bis-stilbene derivative with a low amplified spontaneous emission threshold and balanced hole and electron mobilities

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Shi-Bin Ruan
  • Hao Ye
  • Ko Inada
  • Fatima Bencheikh
  • Atula S.D. Sandanayaka
  • Toshinori Matsushima
  • Chihaya Adachi

Detail(s)

Original languageEnglish
Article number109636
Journal / PublicationOptical Materials
Volume100
Online published16 Jan 2020
Publication statusPublished - Feb 2020
Externally publishedYes

Abstract

To realize high performance in electrically pumped organic semiconductor laser diodes, organic-gain materials with low thresholds of amplified spontaneous emission and laser and balanced hole and electron mobilities are required. However, it is still very difficult to find such well-balanced organic materials. In this study, we show that a spirofluorene-end-capped bis-stilbene derivative of 4-((E)-2-(9,9′-spirobi[fluoren]-3-yl)vinyl)-4'-((E)-2-(9,9′-spirobi[fluoren]-6-yl)vinyl)-1,1′-biphenyl (BSBSF) is an excellent gain medium with a low amplified spontaneous emission threshold of 0.66 μJ cm−2 even in neat films. Additionally, the hole and electron mobilities of BSBSF films are very similar over a wide voltage range. Taking advantage of the balanced mobilities, we were able to obtain suppressed efficiency roll-off in BSBSF-based organic light-emitting diodes. These results will contribute toward fabrication of optically and electrically pumped organic semiconductor laser diodes with high performance. © 2019 Elsevier B.V. All rights reserved.

Research Area(s)

  • Amplified spontaneous emission, Balanced hole and electron mobilities, Efficiency roll-off, Laser, Spirofluorene

Citation Format(s)

A spirofluorene-end-capped bis-stilbene derivative with a low amplified spontaneous emission threshold and balanced hole and electron mobilities. / Ruan, Shi-Bin; Chan, Chin-Yiu; Ye, Hao et al.
In: Optical Materials, Vol. 100, 109636, 02.2020.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review