Enhanced Energy Transfer in Doped Bifluorene Single Crystals: Prospects for Organic Lasers

Paulius Baronas, Gediminas Kreiza, Masashi Mamada, Satoshi Maedera, Povilas Adomėnas, Ona Adomėnienė, Karolis Kazlauskas, Chihaya Adachi, Saulius Juršėnas

研究成果: ジャーナルへの寄稿記事

抄録

Organic single crystals with long-range molecular order ensure enhanced carrier mobility and stability as well as emission outcoupling, which makes them attractive as gain medium for electrically pumped organic lasers. Unfortunately, effects of excitonic coupling introduce losses degrading optical performance in crystals, hence higher lasing thresholds are observed compared to amorphous films. Here, crystal doping strategy is investigated as a method to avoid pronounced reabsorption and annihilation losses associated with J-type excitonic coupling, while taking advantage of enhanced exciton transport for efficient energy transfer. Bifluorene-based derivatives linked with acetylene and ethylene rigid bridges are suitable as host and dopant system forming high-quality crystals doped at various concentrations (0.5–11.0%). Enhanced exciton transport in host crystal mediates picosecond host–dopant energy transfer enabling 100% transfer efficiency at lower doping concentrations compared to amorphous films. Amplified spontaneous emission threshold of 1.9 µJ cm−2 in 3.5% doped crystal is enabled by minimized exciton annihilation and emission reabsorption losses at optimal doping concentration.

元の言語英語
記事番号1901670
ジャーナルAdvanced Optical Materials
DOI
出版物ステータス受理済み/印刷中 - 1 1 2019

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Organic lasers
organic lasers
doped crystals
Energy transfer
energy transfer
excitons
Single crystals
Crystals
Doping (additives)
Excitons
single crystals
crystals
Amorphous films
thresholds
carrier mobility
acetylene
spontaneous emission
lasing
ethylene
Acetylene

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

これを引用

Baronas, P., Kreiza, G., Mamada, M., Maedera, S., Adomėnas, P., Adomėnienė, O., ... Juršėnas, S. (受理済み/印刷中). Enhanced Energy Transfer in Doped Bifluorene Single Crystals: Prospects for Organic Lasers. Advanced Optical Materials, [1901670]. https://doi.org/10.1002/adom.201901670

Enhanced Energy Transfer in Doped Bifluorene Single Crystals : Prospects for Organic Lasers. / Baronas, Paulius; Kreiza, Gediminas; Mamada, Masashi; Maedera, Satoshi; Adomėnas, Povilas; Adomėnienė, Ona; Kazlauskas, Karolis; Adachi, Chihaya; Juršėnas, Saulius.

:: Advanced Optical Materials, 01.01.2019.

研究成果: ジャーナルへの寄稿記事

Baronas, Paulius ; Kreiza, Gediminas ; Mamada, Masashi ; Maedera, Satoshi ; Adomėnas, Povilas ; Adomėnienė, Ona ; Kazlauskas, Karolis ; Adachi, Chihaya ; Juršėnas, Saulius. / Enhanced Energy Transfer in Doped Bifluorene Single Crystals : Prospects for Organic Lasers. :: Advanced Optical Materials. 2019.
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abstract = "Organic single crystals with long-range molecular order ensure enhanced carrier mobility and stability as well as emission outcoupling, which makes them attractive as gain medium for electrically pumped organic lasers. Unfortunately, effects of excitonic coupling introduce losses degrading optical performance in crystals, hence higher lasing thresholds are observed compared to amorphous films. Here, crystal doping strategy is investigated as a method to avoid pronounced reabsorption and annihilation losses associated with J-type excitonic coupling, while taking advantage of enhanced exciton transport for efficient energy transfer. Bifluorene-based derivatives linked with acetylene and ethylene rigid bridges are suitable as host and dopant system forming high-quality crystals doped at various concentrations (0.5–11.0{\%}). Enhanced exciton transport in host crystal mediates picosecond host–dopant energy transfer enabling 100{\%} transfer efficiency at lower doping concentrations compared to amorphous films. Amplified spontaneous emission threshold of 1.9 µJ cm−2 in 3.5{\%} doped crystal is enabled by minimized exciton annihilation and emission reabsorption losses at optimal doping concentration.",
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AU - Mamada, Masashi

AU - Maedera, Satoshi

AU - Adomėnas, Povilas

AU - Adomėnienė, Ona

AU - Kazlauskas, Karolis

AU - Adachi, Chihaya

AU - Juršėnas, Saulius

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