Double Doping of a Low-Ionization-Energy Polythiophene with a Molybdenum Dithiolene Complex

被引:7
作者
Jarsvall, Emmy [1 ]
Biskup, Till [2 ]
Zhang, Yadong [3 ,4 ,5 ]
Kroon, Renee [1 ,6 ]
Barlow, Stephen [3 ,4 ,5 ]
Marder, Seth R. [3 ,4 ,5 ,7 ,8 ]
Muller, Christian [1 ]
机构
[1] Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden
[2] Univ Saarland, Phys Chem, D-66123 Saarbrucken, Germany
[3] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
[4] Ctr Organ Photon & Elect, Atlanta, GA 30332 USA
[5] Univ Colorado, Renewable & Sustainable Energy Inst, Boulder, CO 80303 USA
[6] Linkoping Univ, Lab Organ Elect, S-60174 Norrkoping, Sweden
[7] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80303 USA
[8] Univ Colorado, Dept Chem, Boulder, CO 80303 USA
基金
瑞典研究理事会; 美国国家科学基金会;
关键词
ELECTRON-AFFINITY; RESONANCE; TRANSPORT; POLYMER; ORIGIN;
D O I
10.1021/acs.chemmater.2c01040
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
Doping of organic semiconductors is crucial for tuning the charge-carrier density of conjugated polymers. The exchange of more than one electron between a monomeric dopant and an organic semiconductor allows the polaron density to be increased relative to the number of counterions that are introduced into the host matrix. Here, a molybdenum dithiolene complex with a high electron affinity of 5.5 eV is shown to accept two electrons from a polythiophene that has a low ionization energy of 4.7 eV. Double p-doping is consistent with the ability of the monoanion salt of the molybdenum dithiolene complex to dope the polymer. The transfer of two electrons to the neutral dopant was also confirmed by electron paramagnetic resonance spectroscopy since the monoanion, but not the dianion, of the molybdenum dithiolene complex features an unpaired electron. Double doping allowed an ionization efficiency of 200% to be reached, which facilitates the design of strongly doped semiconductors while lessening any counterion-induced disruption of the nanostructure.
引用
收藏
页码:5673 / 5679
页数:7
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