Charge-Transfer Complexes of Benzothienobenzothiophene with Tetracyanoquinodimethane and the n‑Channel Organic Field-Effect Transistors

n-Channel organic transistors with excellent air stability are realized on the basis of charge-transfer complexes, (BTBT)­(TCNQ), (BTBT)­(F2TCNQ), (BSBS)­(F2TCNQ), and (BTBT)­(F4TCNQ), where BTBT is benzothieno­[3,2-b]­benzo­thiophene, BSBS is benzo­seleno­[3,2-b]­benzo­selenophene, and FnTCNQ (n = 0, 2, and 4) are fluorinated 7,7,8,8-tetracyanoquinodimethanes. These complexes consist of mixed stacks of essentially neutral molecules, and the transistors are air stable even after several-month storage in ambient conditions.