Degradation Mechanism and Stability Improvement Strategy for an Organic Laser Gain Material 4,4′-Bis[(N-carbazole)styryl]biphenyl (BSBCz)

Toshinori Matsushima, Seiya Yoshida, Ko Inada, Yu Esaki, Toshiya Fukunaga, Hiroyuki Mieno, Nozomi Nakamura, Fatima Bencheikh, Matthew R. Leyden, Ryutaro Komatsu, Chuanjiang Qin, Atula S.D. Sandanayaka, Chihaya Adachi

研究成果: ジャーナルへの寄稿記事

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抜粋

The organic material 4,4′-bis[(N-carbazole)styryl]biphenyl (BSBCz) is an excellent gain medium for laser devices. However, BSBCz laser output quickly degrades during photoexcitation, which is an issue that must be overcome before it can be used for practical applications. In this study, the photodegradation mechanisms of BSBCz are investigated with the aim of enhancing its excited-state stability. The photodegradation of BSBCz is attributed to instability of the triplet excited states that would occasionally decompose into other species. This decomposition reduces absorption and introduces exciton quenchers. Incorporating the triplet managing material 9,10-di(naphtha-2-yl)anthracene (ADN) into BSBCz films greatly improves photoluminescence and amplified spontaneous emission stability because of the effective removal of the unstable triplets by ADN. This triplet managing method makes it possible to increase operational stability for BSBCz-based organic light-emitting diodes. Therefore, these results will contribute toward the fabrication of stable optically and electrically pumped organic laser diodes.

元の言語英語
記事番号1807148
ジャーナルAdvanced Functional Materials
29
発行部数10
DOI
出版物ステータス出版済み - 3 7 2019

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Matsushima, T., Yoshida, S., Inada, K., Esaki, Y., Fukunaga, T., Mieno, H., Nakamura, N., Bencheikh, F., Leyden, M. R., Komatsu, R., Qin, C., Sandanayaka, A. S. D., & Adachi, C. (2019). Degradation Mechanism and Stability Improvement Strategy for an Organic Laser Gain Material 4,4′-Bis[(N-carbazole)styryl]biphenyl (BSBCz). Advanced Functional Materials, 29(10), [1807148]. https://doi.org/10.1002/adfm.201807148