Among thiophene-based polymeric materials, side-chain oligothiophene-containing polymers have been much less explored. Meanwhile, there are few reports on the potentials of such side-chain p-conjugated oligomer-containing polymers in organic optoelectronic devices and molecular electronics, in particular, their applications in capacitors have not been studied yet. We present our recent discovery of a series of side-chain p-conjugated oligomer-containing polymers as novel high-performance all-organic nanodielectric materials, which contain true nano-dipolar domains resulting in high permittivity and low dielectric loss across a wide range of frequency (100 Hz ~ 10 MHz). The energy density (1.56 J cc-1) is among the highest in all homopolymers at an electric field of 200 MV m-1. Wide-angle X-ray Diffraction and Differential Scanning Calorimetry studies indicated the formation of crystalline domains of terthiophene side chains dispersed in the polymer backbone matrix. The highly polarizable and fast-responsive nano-dipoles from the nanoscale crystalline domains (only 1-2 nm) are believed to be responsible for the performance. This approach can be generalized to a variety of side-chain p-conjugated oligomer-containing polymers for capacitor applications requiring high energy density and fast pulse power response. 

Nanodipolar side-chain oligothiophene-containing polymers: High-performance all-organic nanodielectric materials for capacitor applications

246th National Meeting (2013)

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