Pyrene fused perylene diimides: synthesis, characterization and applications in organic field-effect transistors and optical limiting with high performance.

Three pyrene fused PDI derivatives have been obtained, in which totally different properties were observed when adopting different fusing types. For bilaterally benzannulated PDIs, through spin-coating, bottom-contact OFET devices exhibited a p-type mobility up to 1.13 cm(2) V(-1) s(-1), with an on/off ratio of 10(8) in air.