Development of Polymer Donor and Acceptor for Green Light Selective Organic Photodetectors
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Organic photodetectors (OPDs) have distinct advantages as strong absorption coefficient, easy color tunability, and solution processability compared with inorganic PDs. Naphtnalene diimide (NDI) derivatives are mostly used electron withdrawing moiety for the organic semiconducting devices. In this study, we synthesized NDI based n-type polymer that overlapped with the absorption range of p-type polymer while improving electron transporting by controlling π-conjugation network. The synthesized n-type polymer showed higher thermal stability and formed uniform morphology with p-type polymer. As a result, we achieved full-width-half-maximum of 155 nm and detectivity of ≈1013 Jones in all-polymer OPDs.