Rectifying effect of heterojunction fabricated in freestanding thin film of polyaniline containing azobenzene side-chain

摘要

An innovative heterojunction is fabricated between two sides of a freestanding thin film of HCl-doped polyaniline (PANI) derivative containing azobenzene side-chain, which is synthesized through an N-alkyl-substituted reaction. Of the film, the side with being irradiated by UV light during preparation is represented as 'A side'; the other side without being irradiated is represented as 'N side'. The electrical properties of the heterojunction are measured and the rectifying effect is observed in the current-voltage characteristic curves with the values of rectifying ratio (γ) being 20 at ±0.06 V at T = 77 K and 4 at ±0.02 V at T = 300 K separately.