An Efficient Diazirine‐Based Four‐Armed Cross‐linker for Photo‐patterning of Polymeric Semiconductors

Abstract

Ad iazirine-based four-armed cross-linker (4CNN) with at etrahedron geometry is presented for efficient patterning of polymeric semiconductors by photo-induced carbene insertion. After blending of 4CNN with no more than 3% (w/ w), photo-patterning of p-, n-, and ambipolar semiconducting polymers with side alkylchains was achieved;regular patterns with sizea ss mall as 5 mmw ere prepared with appropriate photomasks after 365 nm irradiation for just 40 s. The interchain packingo rder and the thin film morphology were nearly unaltered after the cross-linking and the semiconducting properties of the patterned thin films were mostly retained. A complementary-like inverter with ag ain value of 112 was constructed easily by two steps of photo-patterning of the ptype and n-type semiconducting polymers.T he results show that 4CNN is an ew generation of cross-linker for the photopatterning of polymeric semiconductors for all-solution-processible flexible electronic devices.

Direct Patterning of Colloidal Nanocrystals via Thermally Activated Ligand Chemistry

“…Beside the nitrene-based thermal cross-linking and TTT-based thermal decomposition approach reported here, a rich toolbox of thermally sensitive ligands/additives ( e . g ., carbene-based cross-linkers − ) and reaction pathways can be employed. We thus expect TALC to provide more possibilities in building advanced optoelectronic and photonic platforms consisting of integrated arrays of NC layers with tunable heights and hierarchical structures, such as color converting layers in displays, lasing, and metasurfaces.…”