N-Type Quinoidal Polymers Based on Dipyrrolopyrazinedione for Application in All-Polymer Solar Cells,Chemistry - A European Journal

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N-Type Quinoidal Polymers Based on Dipyrrolopyrazinedione for Application in All-Polymer Solar Cells
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2021-08-18 , DOI: 10.1002/chem.202102084
Langheng Pan ₁ , Tao Zhan ₁ , Jiyeon Oh ₂ , Yue Zhang ₁ , Haoran Tang ₁ , Mingqun Yang ₁ , Mengmeng Li ₃ , Changduk Yang ₄ , Xi Liu ₅ , Ping Cai ₆ , Chunhui Duan ₇ , Fei Huang ₁ , Yong Cao ₁

Affiliation

Conjugated molecules and polymers with intrinsic quinoidal structure are promising n-type organic semiconductors, which have been reported for application in field-effect transistors and thermoelectric devices. In principle, the molecular and electronic characteristics of quinoidal polymers can also enable their application in organic solar cells. Herein, two quinoidal polymers, named PzDP-T and PzDP-ffT, based on dipyrrolopyrazinedione were synthesized and used as electron acceptors in all-polymer solar cells (all-PSCs). Both PzDP-T and PzDP-ffT showed suitable energy levels and wide light absorption range that extended to the near-infrared region. When combined with the polymer donor PBDB-T, the resulting all-PSCs based on PzDP-T and PzDP-ffT exhibited a power conversion efficiency (PCE) of 1.33 and 2.37 %, respectively. This is the first report on the application of intrinsic quinoidal conjugated polymers in all-PSCs. The photovoltaic performance of the all-PSCs was revealed to be mainly limited by the relatively poor and imbalanced charge transport, considerable charge recombination. Detailed investigations on the structure-performance relationship suggested that synergistic optimization of light absorption, energy levels, and charge transport properties is needed to achieve more successful application of intrinsic quinoidal conjugated polymers in all-PSCs.

中文翻译：

基于二吡咯并吡嗪二酮的N型醌型聚合物在全聚合物太阳能电池中的应用

具有内在醌型结构的共轭分子和聚合物是很有前途的 n 型有机半导体，已被报道用于场效应晶体管和热电器件。原则上，醌型聚合物的分子和电子特性也可以使其在有机太阳能电池中得到应用。在此，合成了两种基于二吡咯并吡嗪二酮的醌型聚合物 PzDP-T 和 PzDP-ffT，并将其用作全聚合物太阳能电池 (all-PSC) 中的电子受体。PzDP-T 和 PzDP-ffT 都显示出合适的能级和扩展到近红外区域的宽光吸收范围。当与聚合物供体 PBDB-T 结合时，基于 PzDP-T 和 PzDP-ffT 的所得全 PSC 的功率转换效率 (PCE) 分别为 1.33 % 和 2.37 %。这是本征醌型共轭聚合物在全 PSC 中应用的第一份报告。全 PSC 的光伏性能主要受到相对较差和不平衡的电荷传输、大量电荷复合的限制。对结构-性能关系的详细研究表明，需要对光吸收、能级和电荷传输特性进行协同优化，以实现本征醌型共轭聚合物在全 PSC 中的更成功应用。

更新日期：2021-09-24

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