文摘
A highly soluble pyromellitic diimide-based polymer was obtained through imidization polymerization. The novel architecture features diimide subunits linked alternately at 3,6 and N,N鈥?positions. The polymer is highly transparent in the near-ultraviolet鈥搗isible regions. Smooth and uniform thin-films were obtained through spin-coating even after blending the polymer with PCBM in 1:9 polymer/PCBM weight ratio. While the polymer itself has modest electron mobility in typical bottom-gate top-contact OFETs, an electron mobility of 3 脳 10鈥? cm2 V鈥? s鈥? was achieved for the blend, which increased to 10鈥? cm2 V鈥? s鈥? on exposure to propylamine. Thus, polyimides are demonstrated as promising binder materials for solution-processable n-channel semiconductor blends, of which very few examples are known.