Switching charge-transfer characteristics from p-type to n-type through molecular “doping” (co-crystallization)

-TCNQ) adopt a dense one-dimensional (1D) mixed π-π stacking mode with a ratio of DTPTP and TCNQ of 2 : 1, while pure DTPTP molecules utilize a herringbone-packing pattern. Interestingly, theoretical analysis suggested that there is a quasi-2D electron transport network in this host-guest system. Our research results might provide a new strategy, to switch the charge transport characteristics of an original system by appropriate molecular "doping" (co-crystal engineering).