Charge carrier dynamics in alternating polyfluorene copolymer:: Fullerene blends probed by terahertz spectroscopy

被引：31

作者：

Nemec, Hynek ^{[1
]}

Nienhuys, Han-Kwang ^{[2
]}

Zhang, Fengling ^{[3
]}

Inganas, Olle ^{[3
]}

Yartsev, Arkady ^{[1
]}

Sundstrom, Villy ^{[1
]}

机构：

[1] Lund Univ, Dept Chem Phys, S-22241 Lund, Sweden

[2] FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands

[3] Linkoping Univ, IFM, S-58153 Linkoping, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 16期

关键词：

D O I：

10.1021/jp710184r

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：

Time-resolved terahertz spectroscopy is used for investigation of photoinduced charge carrier dynamics in blends of a polyfluorene copolymer (poly [2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4',7'-di-2-thienyl-2',1',3-benzothiadiazole)]) and an electron acceptor ([6,6]-phenyl-C-61-butyric acid methyl ester). The transient far-infrared response appears instantaneously after photoexcitation. We show that the transient conductivity spectrum is dominated by two major contributions: response of separated charge carriers and response of coupled polaron pairs.

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收藏

页码：6558 / 6563

页数：6

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共 36 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] Acceptor influence on hole mobility in fullerene blends with alternating copolymers of fluorene [J].

Andersson, LM ;

Inganäs, O .

APPLIED PHYSICS LETTERS, 2006, 88 (08)

[3] Transient photoconductivity in GaAs as measured by time-resolved terahertz spectroscopy [J].

Beard, MC ;

Turner, GM ;

Schmuttenmaer, CA .

PHYSICAL REVIEW B, 2000, 62 (23) :15764-15777

[4] Organic photovoltaics: technology and market [J].

Brabec, CJ .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2004, 83 (2-3) :273-292

[5] Charge-transfer and energy-transfer processes in π-conjugated oligomers and polymers:: A molecular picture [J].

Brédas, JL ;

Beljonne, D ;

Coropceanu, V ;

Cornil, J .

CHEMICAL REVIEWS, 2004, 104 (11) :4971-5003

[6] Film morphology and photophysics of polyfluorene [J].

Cadby, AJ ;

Lane, PA ;

Mellor, H ;

Martin, SJ ;

Grell, M ;

Giebeler, C ;

Bradley, DDC ;

Wohlgenannt, M ;

An, C ;

Vardeny, ZV .

PHYSICAL REVIEW B, 2000, 62 (23) :15604-15609

[7] Geminate charge recombination in alternating polyfluorene Copolymer/Fullerene blends [J].

De, Swati ;

Pascher, Torbjorn ;

Maiti, Manisankar ;

Jespersen, Kim G. ;

Kesti, Tero ;

Zhang, Fengling ;

Inganas, Olle ;

Yartsev, Arkady ;

Sundstrom, Villy .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (27) :8466-8472

[8] THE RANDOM FREE-ENERGY BARRIER MODEL FOR AC CONDUCTION IN DISORDERED SOLIDS [J].

DYRE, JC .

JOURNAL OF APPLIED PHYSICS, 1988, 64 (05) :2456-2468

[9] Improvements of fill factor in solar cells based on blends of polyfluorene copolymers as electron donors [J].

Gadisa, Abay ;

Zhang, Fengling ;

Sharma, Deepak ;

Svensson, Mattias ;

Andersson, Mats R. ;

Inganas, Olle .

THIN SOLID FILMS, 2007, 515 (05) :3126-3131

[10] Conjugated polymer-based organic solar cells [J].

Guenes, Serap ;

Neugebauer, Helmut ;

Sariciftci, Niyazi Serdar .

CHEMICAL REVIEWS, 2007, 107 (04) :1324-1338

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