TY - JOUR
T1 - Degradation Mechanism and Stability Improvement Strategy for an Organic Laser Gain Material 4,4′-Bis[(N-carbazole)styryl]biphenyl (BSBCz)
AU - Matsushima, Toshinori
AU - Yoshida, Seiya
AU - Inada, Ko
AU - Esaki, Yu
AU - Fukunaga, Toshiya
AU - Mieno, Hiroyuki
AU - Nakamura, Nozomi
AU - Bencheikh, Fatima
AU - Leyden, Matthew R.
AU - Komatsu, Ryutaro
AU - Qin, Chuanjiang
AU - Sandanayaka, Atula S.D.
AU - Adachi, Chihaya
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/3/7
Y1 - 2019/3/7
N2 - 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.
AB - 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.
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U2 - 10.1002/adfm.201807148
DO - 10.1002/adfm.201807148
M3 - Article
AN - SCOPUS:85060340399
SN - 1616-301X
VL - 29
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 10
M1 - 1807148
ER -