A side-chain engineering approach to solvent-resistant semiconducting polymer thin films

作者：Zi-HaoGuo; Ai, Na; McBroom, Connor Ryan; Yuan, Tianyu; Lin, Yen-Hao; Roders, Michael; Zhu, Congzhi; Ayzner, Alexander L.; Pei, Jian; Fang, Lei^*

来源：Polymer Chemistry, 2016, 7(3): 648-655.

DOI：10.1039/c5py01669j

• HETEROJUNCTION SOLAR-CELLS
• THERMALLY REMOVABLE GROUPS
• DONOR-ACCEPTOR COPOLYMERS
• FIELD-EFFECT TRANSISTORS
• CONJUGATED POLYMERS
• SOLUBLE PRECURSOR
• HOLE MOBILITIES
• SOLID-STATE
• ISOINDIGO
• PERFORMANCE

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.

• 出版日期2016
• 单位北京大学