A side-chain engineering approach to solvent-resistant semiconducting polymer thin films
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© The Royal Society of Chemistry 2016. Side-chain manipulation of isoindigo-thiophene derived conjugated polymers was achieved by statistical copolymerization of two different isoindigo monomers decorated with t-Boc groups and polyisobutylene chains, respectively. The long polyisobutylene side-chains ensured solution-processability of the polymers while the t-Boc groups served as a cleavable H-bond inhibitor. By post-film-casting thermal treatment, the t-Boc groups could be removed efficiently to generate a H-bond cross-linked polymer network, which demonstrated excellent solvent resistance. Organic field-effect transistor devices made from these thin films demonstrated retained electronic properties after being immersed in organic solvents. By taking advantage of the post-annealing solvent resistant feature, multilayered films of the polymers could be fabricated using multiple "casting-annealing-casting-annealing" cycles.
author list (cited authors)
Guo, Z., Ai, N. a., McBroom, C. R., Yuan, T., Lin, Y., Roders, M., ... Fang, L.