Measurements of Ambipolar Seebeck Coefficients in High‐Mobility Diketopyrrolopyrrole Donor–Acceptor Copolymers,Advanced Electronic Materials

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Measurements of Ambipolar Seebeck Coefficients in High‐Mobility Diketopyrrolopyrrole Donor–Acceptor Copolymers
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-08-23 , DOI: 10.1002/aelm.201700225
Katharina Broch ₁ , Deepak Venkateshvaran ₁ , Vincent Lemaur ₂ , Yoann Olivier ₂ , David Beljonne ₂ , Mateusz Zelazny ₁ , Iyad Nasrallah ₁ , David J. Harkin ₁ , Martin Statz ₁ , Riccardo Di Pietro ₃ , Auke Jisk Kronemeijer ₄ , Henning Sirringhaus ₁

Affiliation

The Seebeck coefficient of both electrons and holes in a family of ambipolar diketopyrrolopyrrole copolymers is investigated using field‐effect gated measurements. It is found that at high carrier concentrations the magnitude of the Seebeck coefficients is not strongly dependent on the molecular structure of the backbone within this family of polymers. Additionally, the Seebeck coefficients of electrons and holes have very similar magnitudes showing that electrons and holes experience a similar energetic landscape. Subtle differences in the carrier concentration dependence between the polymers are observed, which are interpreted in terms of different degrees of energetic disorder on the basis of molecular dynamics and electronic structure simulations.

中文翻译：

高流动性二酮吡咯并吡咯供体-受体共聚物的双极性塞贝克系数的测量

使用场效应门控测量研究了双极性二酮吡咯并吡咯共聚物系列中电子和空穴的塞贝克系数。已经发现，在高载流子浓度下，塞贝克系数的大小并不强烈取决于该聚合物家族中主链的分子结构。此外，电子和空穴的塞贝克系数的大小非常相似，表明电子和空穴的能量态相似。观察到聚合物之间载流子浓度依赖性的细微差异，这是根据分子动力学和电子结构模拟，根据不同程度的高能紊乱来解释的。

更新日期：2017-08-23

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