Achieving Metal-like Carrier Transport by Hybrid Doping of D-D’ type Polymer
발표자
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초록
내용
We synthesized a new donor-donor (D-D’) type polymer, PIDTSCDTS, based on indacenodithiophene (IDT) and cyclopentadithiophene (CDT) structures and investigated its thermoelectric properties depending on doping methods. A sp2-hybridized alkenyl side chain of the polymer increased π-conjugation, interchain crystalline packing, and charge mobility. Doping efficiencies according to doping methods (sequential doping (SqD), solution-mixed doping (MxD), and hybrid doping (HyD)) were compared using Lewis acid AuCl3 and FeCl3 dopants, and thermoelectric properties were optimized. The HyD- polymer film achieved the remarkably high conductivity (σ) of ~500 S cm-1 by doping both the crystalline and amorphous regions. In addition, by investigating the charge transport behavior by S-σ analysis using Kang-Snyder model, metal-like carrier transport was observed for SqD- and HyD-polymer films.