Poly(9,9-dioctylfluorene)-based light-emitting diodes with pure β-phase emission

被引：24

作者：

Morgado, J.

Alcacer, L.

Charas, A.

机构：

[1] Univ Tecn Lisboa, Dept Engn Quim & Biol, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Tecn Lisboa, Inst Telecomun, Inst Super Tecn, P-1049001 Lisbon, Portugal

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 20期

关键词：

D O I：

10.1063/1.2737424

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors report on poly(9,9-dioctylfluorene) (PFO)-based light-emitting diodes exhibiting an emission spectrum which was previously attributed to the so-called beta phase. These devices were prepared by drop cast from dilute toluene solutions. Photoluminescence and electroluminescence spectra, recorded at room temperature, show no evidence of the usual amorphous phase emission. Devices with pure beta-phase emission exhibit a higher color stability, upon increase of the driving voltage, than those based on amorphous PFO. (C) 2007 American Institute of Physics.

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页数：3

相关论文

共 20 条

[1] Exciton migration in β-phase poly(9,9-dioctylfluorene) -: art. no. 195333 [J].

Ariu, M ;

Sims, M ;

Rahn, MD ;

Hill, J ;

Fox, AM ;

Lidzey, DG ;

Oda, M ;

Cabanillas-Gonzalez, J ;

Bradley, DDC .

PHYSICAL REVIEW B, 2003, 67 (19)

[2] Molecular design and characterization of chromic polyfluorene derivatives [J].

Blondin, P ;

Bouchard, J ;

Beaupré, S ;

Belletête, M ;

Durocher, G ;

Leclerc, M .

MACROMOLECULES, 2000, 33 (16) :5874-5879

[3] Influence of aggregation on the optical properties of a polyfluorene [J].

Bradley, DDC ;

Grell, M ;

Long, X ;

Mellor, H ;

Grice, A ;

Inbasekaran, M ;

Woo, EP .

OPTICAL PROBES OF CONJUGATED POLYMERS, 1997, 3145 :254-259

[4] Blue light-emitting diodes from a meta-linked 2,3 substituted alkoxy poly(p-phenylenevinylene) [J].

Cacialli, F ;

Chuah, BS ;

Friend, RH ;

Moratti, SC ;

Holmes, AB .

SYNTHETIC METALS, 2000, 111 :155-158

[5] Noncrystalline phases in poly(9,9-di-n-octyl-2,7-fluorene) [J].

Chen, SH ;

Su, AC ;

Chen, SA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (20) :10067-10072

[6] Crystalline forms and emission behavior of poly(9,9-di-n-octyl-2,7-fluorene) [J].

Chen, SH ;

Su, AC ;

Su, CH ;

Chen, SA .

MACROMOLECULES, 2005, 38 (02) :379-385

[7] Chain conformations and photoluminescence of poly(di-n-octylfluorene) -: art. no. 107402 [J].

Chunwaschirasiri, W ;

Tanto, B ;

Huber, DL ;

Winokur, MJ .

PHYSICAL REVIEW LETTERS, 2005, 94 (10)

[8] Kinetics and thermodynamics of poly(9,9-dioctylfluorene) β-phase formation in dilute solution [J].

Dias, Fernando B. ;

Morgado, Jorge ;

Macanita, Antonio L. ;

da Costa, Fernando P. ;

Burrows, Hugh D. ;

Monkman, Andrew P. .

MACROMOLECULES, 2006, 39 (17) :5854-5864

[9]

Grell M, 1998, ACTA POLYM, V49, P439, DOI 10.1002/(SICI)1521-4044(199808)49:8<439::AID-APOL439>3.0.CO

[10]

2-A