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：
瑞典研究理事会; 欧洲研究理事会;
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.
引用
收藏
页码：2442 / 2446
页数：5
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