Dithiophene-Fused Tetracyanonaphthoquinodimethanes (DTTNAPs): Synthesis and Characterization of π-Extended Quinoidal Compounds for n-Channel Organic Semiconductor

摘要

Dithiophene-fused tetracyanonaphthoquinodimethanes (DTTNAPs) were synthesized and evaluated as n-channel organic semiconductors. DTTNAPs, regardless of isomeric structures and substituents, have low-lying LUMO energy levels (～4.6 eV below the vacuum level), suitable for stable n-channel field-effect transistors (FETs) under ambient conditions. In fact, α-DTTNAP derivatives afforded solution-processed FETs showing an electron mobility of 10~(-3) cm~2 V~(-1) s~(-1), indicating that DTTNAPs are a potential molecular framework for nchannel organic semiconductors.