School of Science;
Tianjin Key Laboratory of Molecular Optoelectronic Science;
Department of Chemistry;
Collaborative Innovation Center of Chemical Science and Engineering;
Tianjin University;
Tianjin 300072;
China;
School of Chemical Engineering and Technology;
Tianjin Engineering Research Center of Functional Fine Chemicals;
Tianjin University;
Tianjin 300072;
China;
Organic fi eld-eff ect transistor; Biosensor; Biomolecular immobilization strategy; Device performance;