Conjugation effects on carrier mobilities of polythiophenes probed by time-resolved terahertz spectroscopy

被引：20

作者：

Esenturk, Okan ^{[1
]}

Kline, R. Joseph ^{[2
]}

Deongchamp, Dean M. ^{[2
]}

Heilweil, Edwin J. ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Phys Lab, Opt Technol Div, Gaithersburg, MD 20899 USA

[2] Natl Inst Stand & Technol, Mat Sci & Engn Lab, Div Polymer, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 29期

关键词：

D O I：

10.1021/jp802700y

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：

Optically generated carrier conductivity of thiophene-based spin-cast polymer films, as cast poly(3-hexylthiophene) (P3HT) and both as cast and above liquid crystalline temperature annealed poly(2,5-bis(3tetradecylthiophen-2yl)thieno[3,2-b]thiophene) (PBTTT), were measured by time-resolved THz spectroscopy (TRTS) and compared to reported thin-film transistor (TFT) device measurements. The relative mobilities of the samples measured by TRTS agree well with reported TFl` mobilities. Since TRTS is sensitive to shortrange carrier mobility, this study suggests that increased mobility of PBTTT relative to P3HT films arises from improved ordering of the local structure, increased effective conjugation length, and planarity of PBTTT molecules in the solid state.

引用

页码：10587 / 10590

页数：4

共 34 条

[1] Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy [J].

Ai, Xin ;

Beard, Matthew C. ;

Knutsen, Kelly P. ;

Shaheen, Sean E. ;

Rumbles, Garry ;

Ellingson, Randy J. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (50) :25462-25471

[2] CONDUCTIVITY AS A FUNCTION OF CONJUGATION LENGTH - THEORY AND EXPERIMENT FOR CONDUCTING POLYMER COMPLEXES [J].

BAUGHMAN, RH ;

SHACKLETTE, LW .

PHYSICAL REVIEW B, 1989, 39 (09) :5872-5886

[3]

Beljonne D, 2001, ADV FUNCT MATER, V11, P229, DOI 10.1002/1616-3028(200106)11:3<229::AID-ADFM229>3.0.CO

[4]

2-L

[5] Charge transport limited by grain boundaries in polycrystalline octithiophene thin film transistors [J].

Bourguiga, R ;

Horowitz, G ;

Garnier, F ;

Hajlaoui, R ;

Jemai, S ;

Bouchriha, H .

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS, 2002, 19 (02) :117-122

[6] STUDIES ON IODINE DOPED THIOPHENE OLIGOMERS [J].

CAO, Y ;

GUO, D ;

PANG, M ;

QIAN, RY .

SYNTHETIC METALS, 1987, 18 (1-3) :189-194

[7]

Chang J.-F., 2006, Phys. Rev. B, P74

[8] Enhanced mobility of poly(3-hexylthiophene) transistors by spin-coating from high-boiling-point solvents [J].

Chang, JF ;

Sun, BQ ;

Breiby, DW ;

Nielsen, MM ;

Sölling, TI ;

Giles, M ;

McCulloch, I ;

Sirringhaus, H .

CHEMISTRY OF MATERIALS, 2004, 16 (23) :4772-4776

[9] Relative importance of polaron activation and disorder on charge transport in high-mobility conjugated polymer field-effect transistors [J].

Chang, Jui-Fen ;

Sirringhaus, Henning ;

Giles, Mark ;

Heeney, Martin ;

McCulloch, Iain .

PHYSICAL REVIEW B, 2007, 76 (20)

[10] Temperature and gate voltage dependent transport across a single organic semiconductor grain boundary [J].

Chwang, AB ;

Frisbie, CD .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (03) :1342-1349

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