Polarized photoluminescence and electroluminescence in oriented films of regioregular poly(3-alkylthiophenes)

被引：38

作者：

Bolognesi, A. ^{[1
]}

Botta, C. ^{[1
]}

Martinelli, M. ^{[1
]}

Porzio, W. ^{[1
]}

机构：

[1] CNR, Ist Chim Macromol, I-20133 Milan, Italy

来源：

ORGANIC ELECTRONICS | 2000年 / 1卷 / 01期

关键词：

Polarized electroluminescence; Poly(3-alkylthiophenes); Regioregularity; Conjugation length;

D O I：

10.1016/S1566-1199(00)00005-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report polarized photoluminescence (PL) and electroluminescence (EL) from regioregular poly(3-alkylthiophene) thin films oriented by means of the rubbing technique. With a proper thermal annealing of the rubbed films we have increased the anisotropy reaching values up to 8 both in PL and EL. We have evidenced that the orientation in the rubbing direction is higher for the longest conjugation segments than for the less conjugated ones. Moreover polarized PL study demonstrates that emission takes place after migration of the excitation from shorter, less oriented, to longer, more oriented conjugation segments. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：27 / 32

页数：6

相关论文

共 23 条

[1] Preparation and characterization of poly[3-(6-tetrahydropyraniloxyhexyl)]-2,5-thienylene Langmuir-Blodgett films [J].

Bolognesi, A ;

Bertini, F ;

Bajo, G ;

Provasoli, A ;

Villa, D ;

Ahumada, O .

THIN SOLID FILMS, 1996, 289 (1-2) :129-132

[2] Photoluminescence and electroluminescence in Langmuir-Blodgett films of poly(3-decylmethoxythiophene) [J].

Bolognesi, A ;

Botta, C ;

Bajo, G ;

Österbacka, R ;

Östergård, T ;

Stubb, H .

SYNTHETIC METALS, 1998, 98 (02) :123-127

[3] Polarized electroluminescence from an oriented poly(3-alkylthiophene) Langmuir-Blodgett structure [J].

Bolognesi, A ;

Bajo, G ;

Paloheimo, J ;

Ostergard, T ;

Stubb, H .

ADVANCED MATERIALS, 1997, 9 (02) :121-124

[4] Characterization of poly(3-decylmethoxythiophene) multilayers [J].

Bolognesi, A ;

Bajo, G ;

Comoretto, D ;

Elmino, P ;

Luzzati, S .

THIN SOLID FILMS, 1997, 299 (1-2) :169-172

[5]

Bolognesi A, 1999, ACTA POLYM, V50, P151, DOI 10.1002/(SICI)1521-4044(19990401)50:4<151::AID-APOL151>3.3.CO

[6]

2-G

[7] INFRARED CHARACTERIZATION OF ORIENTED POLY(PHENYLENE VINYLENE) [J].

BRADLEY, DDC ;

FRIEND, RH ;

LINDENBERGER, H ;

ROTH, S .

POLYMER, 1986, 27 (11) :1709-1713

[8] Polarized light emission from LEDs prepared by the Langmuir-Blodgett technique [J].

Cimrova, V ;

Remmers, M ;

Neher, D ;

Wegner, G .

ADVANCED MATERIALS, 1996, 8 (02) :146-&

[9] POLARIZED ELECTROLUMINESCENCE FROM AN ORIENTED SUBSTITUTED POLYTHIOPHENE IN A LIGHT-EMITTING DIODE [J].

DYREKLEV, P ;

BERGGREN, M ;

INGANAS, O ;

ANDERSSON, MR ;

WENNERSTROM, O ;

HJERTBERG, T .

ADVANCED MATERIALS, 1995, 7 (01) :43-45

[10] Electroluminescence in conjugated polymers [J].

Friend, RH ;

Gymer, RW ;

Holmes, AB ;

Burroughes, JH ;

Marks, RN ;

Taliani, C ;

Bradley, DDC ;

Dos Santos, DA ;

Brédas, JL ;

Lögdlund, M ;

Salaneck, WR .

NATURE, 1999, 397 (6715) :121-128