Organic mixed ionic-electronic conductor(OMIEC)polymers with the ability of mixed charge transport have been widely used in organic electronic devices,such as organic thermoelectric transistors(OTEs)and organic electr...Organic mixed ionic-electronic conductor(OMIEC)polymers with the ability of mixed charge transport have been widely used in organic electronic devices,such as organic thermoelectric transistors(OTEs)and organic electrochemical transistors(OECTs).The development of an n-type OMIEC remains a grand challenge.Herein,a double B←N bridged bipyridine unit with strong electron deficiency is used to build acceptor-acceptor type conjugated polymers(PBN-alkyl and PBN-OEG).PBN-OEG with oligoethylene glycol side chains exhibits weaker crystallinity,improved doping efficiency,and superior ion uptake capacity relative to the counterpart polymer with alkyl side chains.As a result,PBN-OEG exhibits a higher conductivity of 1.95 S cm-1,a better power factor of 4.7μW m-1 K-2 in OTEs,and a largeμC*of 2.6 F cm-1 V-1 s-1 in OECTs.Such results demonstrate the great potential of acceptor-acceptor type organoboron polymers for OMIEC materials.展开更多
基金support from the National Natural Science Foundation of China(Nos.52273201,52473199)J.L.thanks the Jilin Scientific and Technological Development Program(No.20230402070GH)+1 种基金a grant for Distinguished Young Scholars of the National Natural Science Foundation of China(Overseas)A portion of this work is based on the data obtained at BSRF-1W1A.The authors gratefully acknowledge the cooperation of the beamline scientists at the BSRF-1W1A beamline.
文摘Organic mixed ionic-electronic conductor(OMIEC)polymers with the ability of mixed charge transport have been widely used in organic electronic devices,such as organic thermoelectric transistors(OTEs)and organic electrochemical transistors(OECTs).The development of an n-type OMIEC remains a grand challenge.Herein,a double B←N bridged bipyridine unit with strong electron deficiency is used to build acceptor-acceptor type conjugated polymers(PBN-alkyl and PBN-OEG).PBN-OEG with oligoethylene glycol side chains exhibits weaker crystallinity,improved doping efficiency,and superior ion uptake capacity relative to the counterpart polymer with alkyl side chains.As a result,PBN-OEG exhibits a higher conductivity of 1.95 S cm-1,a better power factor of 4.7μW m-1 K-2 in OTEs,and a largeμC*of 2.6 F cm-1 V-1 s-1 in OECTs.Such results demonstrate the great potential of acceptor-acceptor type organoboron polymers for OMIEC materials.
