Balancing the electrical conductivity and Seebeck coefficient by controlled interfacial doping towards high performance benzothienobenzothiophene-based organic thermoelectric materials
作者： Jingjuan Tan , Zhanhua Chen , Dagang Wang , Shihui Qin , Xu Xiao
DOI: 10.1039/C9TA09620E
关键词: Seebeck coefficient 、 Thermoelectric materials 、 Thermoelectric effect 、 Doping 、 Electrical resistivity and conductivity 、 Materials science 、 Carbon nanotube 、 Acceptor 、 Dopant 、 Chemical engineering
摘要: Herein, we demonstrated a new strategy of balancing the electrical conductivity and Seebeck coefficient for high-performance p-type organic thermoelectric composites single-walled carbon nanotubes (SWCNTs) 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8BTBT) by controlling doping process. It was found that interfacial composite films with vacuum-deposited acceptor, 7,7,8,8-tetracyanoquinodimethane (TCNQ), led to formation charge-transfer complex crystals at interface, which resulted in higher carrier mobilities moderate concentrations compared solution-phase bulk method. The film SWCNT/C8BTBT interfacial-doped fine-tuned 40 nm-thick TCNQ exhibited power factor as high 284 μW m−1 K−2 room temperature, five times than doped similar dopant addition. attributed less interruption lattice structure controlled charge transfer processes among SWCNTs, C8BTBT TCNQ. This can be used general method composites.
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