Large gain for crystalline thin films of thiophene/phenylene co-oligomer by photopumping with femtosecond laser pulses

Mochizuki, Hiroyuki; Kawaguchi, Yuji; Sasaki, Fumio; Hotta, Shu

doi:10.1016/j.jlumin.2014.06.049

Cited by 4 publications

(3 citation statements)

References 25 publications

(31 reference statements)

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“…The development of several π-conjugated oligomers has contributed to the advancement of organic optical and electronic devices. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] For example, bis-styrylbenzene derivatives (BSDs) and thiophene/phenylene co-oligomers (TPCOs) show remarkable optical and electrical characteristics. Various studies have reported the excellent photophysical properties of BSDs and TPCOs, where 1,4-bis(4trifluoromethylstyryl)benzene and α,ω-bis(biphenylyl) terthiophene (BP3T) show very low amplified spontaneous emission thresholds.…”

Section: Introductionmentioning

confidence: 99%

Improvement in thermal stability of solar cell using a non-fullerene n-type liquid crystalline semiconductor

Mochizuki¹,

Suzuki²,

Chikamatsu³

et al. 2020

Jpn. J. Appl. Phys.

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A non-fullerene n-type semiconductor material based on a central benzothiadiazole moiety flanked with octyl-vinylimides (4,7-bis(4-(N-octylphthalimide)vinyl)benzo[c]1,2,5-thiadiazole, OPIBT) was synthesized. OPIBT was found to be a liquid crystalline material with a smectic phase. We fabricated a solar cell with a bulk heterojunction structure using OPIBT and poly(3-hexylthiophene-2,5-diyl) as a p-type semiconductor. On comparing it with a solar cell using a compound with a similar skeleton but exhibiting no liquid crystallinity, we found the thermal stability of the OPIBT solar cells to be superior. © 2020 The Japan Society of Applied Physics PSS (50 nm)/PIBT:P3HT and OPIBT:P3HT (100 nm)/LiF (2 nm)/Al (100 nm). Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS; Clevious) was spin-coated Fig. 1. Chemical structures of PIBT and OPIBT.

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Section: Introductionmentioning

confidence: 99%

Improvement in thermal stability of solar cell using a non-fullerene n-type liquid crystalline semiconductor

Mochizuki¹,

Suzuki²,

Chikamatsu³

et al. 2020

Jpn. J. Appl. Phys.

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“…[1][2][3] This leads to the enhancement of the optical and electronic characteristics of organic compounds. [4][5][6][7][8][9][10][11][12][13][14][15] Among functional organic compounds, some compounds having a bis-styrylbenzene skeleton show high crystallization based on their planar structure, which is composed of benzene rings and carbon double bonds. Unsubstituted poly( p-phenylene vinylene) (PPV) also has the bis-styrylbenzene skeleton in its main chain and exhibits high crystallization, resulting in high electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

Emission behavior of trifluoromethyl bis-styrylbenzene derivative

Mochizuki

Sonoda

Sasaki

et al. 2016

Jpn. J. Appl. Phys.

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We measured detailed photophysical properties of 1,4-bis(4-trifluoromethylstyryl)benzene (3PV-CF3). 3PV-CF3 showed a high fluorescence quantum efficiency and a high radiative rate constant. Furthermore, we evaluated the emission behavior of 3PV-CF3 under excitation of femtosecond laser pulses. Microcrystals of 3PV-CF3 were prepared easily by spin-coating, and were confirmed for amplified spontaneous emission. It has a low threshold of 34 µJ cm−2.

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“…T he conditions required for the material of the organic current injection type laser, which is currently drawing attention, are flowing large current, showing low amplified spontaneous emission (ASE) thresholds, and forming good quality solid states, preferably crystals. Promising materials for the current injection type lasers are mainly π-conjugated oligomers such as thiophene/phenylene co-oligomers (TPCOs) [1][2][3][4][5] and bis-styrylbenzene derivatives (BSDs). [6][7][8][9][10][11] TPCOs had good crystallinity, and when field effect transistors were fabricated using their crystals, they showed a field effect mobility of 0.16 cm 2 V −1 s −1 .…”

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confidence: 99%

Very low amplified spontaneous emission thresholds of bis-styrylbenzene derivatives with trifluoromethyl and trifluoromethoxy groups in terminal positions

Mochizuki¹

2019

Appl. Phys. Express

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In considering the future development of organic current injection laser devices, it is indispensable to develop an n-type semiconductor material exhibiting excellent luminescence ability. Therefore, the author focused on bis-styrylbenzene which is an optoelectronically superior skeleton and trifluoromethyl groups which are electron-withdrawing groups: the research subjects in this report were E,E-1,4-bis(4-trifluorometylstyryl)benzene (4CF3) and E,E-1,4-bis(4-trifluoromethoxystyryl)benzene (4OCF3). 4CF3 and 4OCF3 had very good crystallinity, and could easily form relatively large crystals simply by dropping the solution on to the polydimethylsiloxane plate. The crystals of 4CF3 and 4OCF3 showed excellent emission abilities. The crystals of 4CF3 and 4OCF3 showed very low amplified spontaneous emission (ASE) thresholds of, respectively, 1.6 and 3.0 μJcm−2 under nitrogen laser excitation.

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Large gain for crystalline thin films of thiophene/phenylene co-oligomer by photopumping with femtosecond laser pulses

Cited by 4 publications

References 25 publications

Improvement in thermal stability of solar cell using a non-fullerene n-type liquid crystalline semiconductor

Improvement in thermal stability of solar cell using a non-fullerene n-type liquid crystalline semiconductor

Emission behavior of trifluoromethyl bis-styrylbenzene derivative

Very low amplified spontaneous emission thresholds of bis-styrylbenzene derivatives with trifluoromethyl and trifluoromethoxy groups in terminal positions

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