Photo-, and electroluminescence studies of 2,5-bis[2′-(4″-(6-hexoxy benzyl))-1′-ethenyl]-3, 4-dibutyl thiophenes

Blumstengel, S.; Sokolik, I.; Dorsinville, R.; Voloschenko, D.; He, Meng; Lavrentovich, Oleg D.; Chien, Liang Chy

doi:10.1016/s0379-6779(98)01492-1

Cited by 23 publications

(13 citation statements)

References 14 publications

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“…5), which set up the condition for efficient energy transfer between PVK and P9 . Similar observations have been reported before for other thiophene related systems 15, 28. However, whether the energy transfer took place as emission and reabsorption of photons or direct transfer of energy between the excited state of PVK and ground state of P9 is still unknown.…”

Section: Resultssupporting

confidence: 85%

“…It has been well known that organic molecules with PL maxima in the blue region often show EL at nearly the same spectral region, as a similar mechanism is usually responsible for both radiative processes 22. The concentration quenching phenomenon has been observed with this type of chromophore 15. It has been demonstrated that device efficiencies can be improved by the use of polymer blends;2, 23–25 therefore, the effects of blending the new copolymer with two other polymers, poly(methyl methacrylate) (PMMA) and poly(vinyl carbazole) (PVK), respectively, on PL intensities will also be discussed.…”

Section: Introductionmentioning

confidence: 93%

“…Also, fully conjugated poly(phenylene‐ co ‐furan) and poly(phenylene–vinlyene‐ co ‐thiophene) have been reported 8, 13, 14. The use of block copolymer incorporating thiophene unit in a phenylene–vinylene‐based system has been less studied, although promising properties has been demonstrated 15, 16…”

Section: Introductionmentioning

confidence: 99%

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Photoluminescent properties of poly(p-phenylene vinylene thiophene-co-siloxane)

Tong

Chien

2000

J. Polym. Sci. A Polym. Chem.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 93%

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Photoluminescent properties of poly(p-phenylene vinylene thiophene-co-siloxane)

Tong

Chien

2000

J. Polym. Sci. A Polym. Chem.

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“…These observations are consistent with previous results on polyurethane-based PLEDs that clearly lead to a suspicion on whether polyurethanes are appropriate polymers for designing hosts. Notably, by decreasing the degree of hydrogen bond interactions between the emitter and the polymeric host, authors evidenced an enhancement of luminance with oligophenylenes tethered to polyurethanes [118]. With a red fluorescent dopant, Ha reported devices that only reached 50-60 cd/m 2 [92,115].…”

Section: Polymers With Carbazoles In the Main Chainmentioning

confidence: 99%

Carbazole-based polymers as hosts for solution-processed organic light-emitting diodes: Simplicity, efficacy

Dumur

2015

Organic Electronics

138

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] To overcome the lack of efficiency, several experiments using MEH-PPV blended with other polymers have been reported. [17][18][19][20][21][22][23][24][25][26][27][28][29][30] Nevertheless, there are several other reasons to prepare blends with electroluminescent materials: to isolate the electroluminescent macromolecules for performing single molecule spectroscopy and understanding the electron energy transfer processes; 25,31,32 to change the emission colors; 23,28,33 by decreasing the aggregation with enhancement of the electron mobility; 34 to combining electron and hole transport properties;…”

Section: Introductionmentioning

confidence: 99%

Probing interchain interactions in emissive blends of poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene] with polystyrene and poly(styrene-co-2-ethylhexyl acrylate) by fluorescence spectroscopy

Andrade¹,

Atvars²

2006

J. Braz. Chem. Soc.

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Nesse trabalho foram realizados estudos dinâmicos e estáticos de fotoluminescência de blendas poliméricas do poli[2-metóxi-5-(2'-etilexiloxi)-p-fenileno vinileno] (MEH-PPV) com poliestireno-co-2-co-metacrilato de metila1-1-pirenila e seu copolímero poli(estireno-co-acrilato de 2-etilexila-co-1-metacrilato de metila1-1-pirenila) (com 9 mol% e 19 mol% de unidades acrilato de 2-etilexila unidades e 0,06 mol% de 1-pirenila). O poliestireno marcado com pirenilo e alguns de seus copolímeros foram sintetizados por polimerização em emulsão e caracterizados por 13 C e 1 H NMR, FTIR, GPC, DSC e UV-Vis. Os filmes foram preparados por deposição centrífuga a partir de soluções em clorofórmio, sendo a composição das blendas de 0,1, 0,5, 1,0, e 5,0 m/m% de MEH-PPV. A miscibilidade desses sistemas foi estudada através dos processos de transferência não-radiativa de energia entre o grupo 1-pirenila (doadores de energia) e o MEH-PPV (receptor de energia). A intensidade relativa de emissão e os tempos de decaimento de fluorescência do doador mostraram que a miscibilidade do MEH-PPV e dos copolímeros e maior do que entre o MEH-PPV e o poliestireno o que foi confirmado por microscopia óptica de epifluorescência e por microscopia eletrônica de varredura.We present dynamic and static photoluminescence studies on polymer blends of conjugated poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) with polystyrene-co-1-pyrenyl methyl methacrylate and its copolymer poly(styrene-co-2-ethylhexyl acrylate-co-1-pyrenylmethyl methacrylate) (with 9 mol% and 19 mol% of 2-ethylhexyl acrylate units and 0.06 mol% of 1-pyrenyl). Pyrenyl-labeled polystyrene and its copolymers were synthesized by emulsion polymerization and characterized by 13 C and 1 H-NMR, FTIR, GPC, DSC, and UVVis. Spin-coating films of the blends were prepared from chloroform solutions with 0.1, 0.5, 1.0, and 5.0 wt% of MEH-PPV. The miscibility of these systems was studied by non-radiative energy transfer processes between the 1-pyrenyl moieties (the energy donor) and MEH-PPV (the energy acceptor). The relative emission intensities and the fluorescence lifetimes of the donor showed that the miscibility of MEH-PPV and the copolymers is greater than that of MEH-PPV and polystyrene and this was confirmed by epifluorescence optical microscopy and scanning electron microscopy.Keywords: poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV), blends, miscibility, copolymer poly(styrene-co-2-ethylhexyl acrylate-co-1-pyrenylmethyl methacrylate), fluorescence, energy transfer IntroductionConjugated polymers are the subject of considerable scientific attention because they constitute attractive components for application as emissive materials in electroluminescent devices and, in particular, as organic light-emitting diodes (OLED).1 Such interest is attributed to their superior processability and flexibility relative to inorganic compounds, greater possibility of preparation of materials with distinct emission colors, electroluminescence emission with low turn-on volt...

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Photo-, and electroluminescence studies of 2,5-bis[2′-(4″-(6-hexoxy benzyl))-1′-ethenyl]-3, 4-dibutyl thiophenes

Cited by 23 publications

References 14 publications

Photoluminescent properties of poly(p-phenylene vinylene thiophene-co-siloxane)

Photoluminescent properties of poly(p-phenylene vinylene thiophene-co-siloxane)

Carbazole-based polymers as hosts for solution-processed organic light-emitting diodes: Simplicity, efficacy

Probing interchain interactions in emissive blends of poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene] with polystyrene and poly(styrene-co-2-ethylhexyl acrylate) by fluorescence spectroscopy

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