Electron and Hole Contributions to the Terahertz Photoconductivity of a Conjugated Polymer:Fullerene Blend Identified

被引：32

作者：

Ponseca, Carlito S., Jr. ^{[1
]}

Nemec, Hynek ^{[2
]}

Vukmirovic, Nenad ^{[3
]}

Fusco, Sandra ^{[4
]}

Wang, Ergang ^{[4
]}

Andersson, Mats R. ^{[4
]}

Chabera, Pavel ^{[1
]}

Yartsev, Arkady ^{[1
]}

Sundstrom, Villy ^{[1
]}

机构：

[1] Lund Univ, Div Phys Chem, S-22100 Lund, Sweden

[2] Acad Sci Czech Republ, Inst Phys, Prague 18221, Czech Republic

[3] Univ Belgrade, Inst Phys Belgrade, Comp Sci Lab, Belgrade 11080, Serbia

[4] Chalmers Univ Technol, Dept Chem & Biol Engn, S-41296 Gothenburg, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2012年 / 3卷 / 17期

基金：

欧洲研究理事会; 瑞典研究理事会;

关键词：

ALTERNATING POLYFLUORENE COPOLYMERS; GEMINATE CHARGE RECOMBINATION; CARRIER DYNAMICS; TRANSPORT; POLYMERS; MOBILITY; CHAINS;

D O I：

10.1021/jz301013u

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 was employed for the investigation of charge-transport dynamics in benzothiadiazolo-dithiophene polyfluorene ([2,7-(9,9-dioctylfluorene)-alt-S,S-(4',7'-di-2-thieny1-2',1',3'-benzothiadiazole)]) (APFO-3) polymers with various chain lengths and in its monomer form, all blended with an electron acceptor ([6,6]-phenyl-C61-butyric acid methyl ester, PCBM). Upon photo-excitation, charged polaron pairs are created, negative charges are transferred to fullerenes, while positive polarons remain on polymers/monomers. Vastly different hole mobility in polymer and monomer blends allows us to distinguish the hole and electron contributions to the carrier mobility.

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页码：2442 / 2446

页数：5

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