A highly stable and efficient organic microcavity polariton laser

J Witt, A Mischok, F Le Roux, Malte Christian Gather*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


With their remarkably low thresholds, organic polariton lasers are a promising alternative to organic photonic lasers. However, device stability remains a challenge, in part due to material degradation during deposition of the top dielectric mirror. We demonstrate polariton lasers based on 4,4´-Bis(4-(9H-carbazol-9-yl)styryl)biphenyl (BSBCz) as active material that achieve a low lasing threshold of 8.7 μJ/cm2, and we show that a ZrO2 protection layer between active layer and top mirror significantly improves stability. Optimized devices exhibit minimal degradation after 100,000 excitation pulses at 3.8 times above threshold. Our findings establish BSBCz as an attractive candidate for future injection driven polariton lasers.
Original languageEnglish
Number of pages6
JournalMRS Communications
Early online date19 Mar 2024
Publication statusE-pub ahead of print - 19 Mar 2024


  • Laser
  • Organic
  • Thin film
  • Atomic layer deposition


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