Nanoscale Ordered Structure Distribution in Thin Solid Film of Conjugated Polymers: Its Significance in Charge Transport Across the Film and in Performance of Electroluminescent Device

被引：22

作者：

Chen, Ming-Chih ^{[1
]}

Hung, Wei-Chun ^{[1
]}

Su, An-Chung ^{[1
]}

Chen, Su-Hua ^{[2
]}

Chen, Show-An ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan

[2] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Hualien 974, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 32期

关键词：

LIGHT-EMITTING-DIODES; SCANNING OPTICAL MICROSCOPY; INDIUM TIN OXIDE; INTERCHAIN INTERACTIONS; ENERGY-TRANSFER; MORPHOLOGY; FIELD; AGGREGATION; EMISSION; MOBILITY;

D O I：

10.1021/jp901644m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We use ultrahigh-vacuum conducting atomic force microscopy to probe the local current distributions in spin-cast thin films from the solutions of poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) and poly(9,9-di-n-octyl-2,7-fluorene) (PFO). We found that spatially homogeneous distribution of the ordered structures (well-packed chains and/or aggregates) in MEH-PPV can be controlled by the selection of solvent or mixed solvent, by which effects of spatial charge transport distribution in MEH-PPV thin films on the performance of polymer light-emitting diodes (PLEDs) are unambiguously clarified. For PFO thin film, after the treatment by immersing in the mixed nonsolvent composed of a solvent and nonsolvent, the ordered structures (beta-phase) are generated; its excess content can result in highly conducting regions. However, the device efficiency can be promoted significantly by optimizing the content of beta-phase.

引用

页码：11124 / 11133

页数：10

共 67 条

[51] Efficient light harvesting by sequential energy transfer across aggregates in polymers of finite conjugational segments with short aliphatic linkages [J].

Peng, KY ;

Chen, SA ;

Fann, WS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (46) :11388-11397

[52] Well-packed chains and aggregates in the emission mechanism of conjugated polymers [J].

Peng, KY ;

Chen, SA ;

Fann, WS ;

Chen, SH ;

Su, AC .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (19) :9368-9373

[53] The mobility spatial distribution function: Turn-on dynamics of polymer photocells [J].

Rappaport, N ;

Solomesch, O ;

Tessler, N .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (06)

[54] Mobility spatial distribution function: Comparative method for conjugated polymers/molecules [J].

Rappaport, Noam ;

Bar, Yehoram ;

Solomeshch, Olga ;

Tessler, Nir .

APPLIED PHYSICS LETTERS, 2006, 89 (25)

[55] Nanoscopic interchain aggregate domain formation in conjugated polymer films studied by third harmonic generation near-field scanning optical microscopy [J].

Schaller, RD ;

Snee, PT ;

Johnson, JC ;

Lee, LF ;

Wilson, KR ;

Haber, LH ;

Saykally, RJ ;

Nguyen, TQ ;

Schwartz, BJ .

JOURNAL OF CHEMICAL PHYSICS, 2002, 117 (14) :6688-6698

[56] Conjugated polymers as molecular materials : How chain conformation and film morphology influence energy transfer and interchain interactions [J].

Schwartz, BJ .

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 2003, 54 :141-172

[57] Device performance and polymer morphology in polymer light emitting diodes: The control of thin film morphology and device quantum efficiency [J].

Shi, Y ;

Liu, J ;

Yang, Y .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :4254-4263

[58] Effect of electric field, solvent, and concentration on the electroluminescence spectra and performance of poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] based light emitting diodes [J].

Sinha, S ;

Monkman, AP .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (09) :5691-5700

[59] Two-dimensional charge transport in self-organized, high-mobility conjugated polymers [J].

Sirringhaus, H ;

Brown, PJ ;

Friend, RH ;

Nielsen, MM ;

Bechgaard, K ;

Langeveld-Voss, BMW ;

Spiering, AJH ;

Janssen, RAJ ;

Meijer, EW ;

Herwig, P ;

de Leeuw, DM .

NATURE, 1999, 401 (6754) :685-688

[60] The morphological dependence of charge transport in a soluble luminescent conjugated polymer [J].

Tan, CH ;

Inigo, AR ;

Fann, W ;

Wei, PK ;

Perng, GY ;

Chen, SA .

ORGANIC ELECTRONICS, 2002, 3 (02) :81-88

← 1 2 3 4 5 6 7 →