Simple Polythiophene Solar Cells Approaching 10% Efficiency via Carbon Chain Length Modulation of Poly(3-alkylthiophene),Macromolecules

当前位置： X-MOL 学术 › Macromolecules › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Simple Polythiophene Solar Cells Approaching 10% Efficiency via Carbon Chain Length Modulation of Poly(3-alkylthiophene)
Macromolecules ( IF 5.1 ) Pub Date : 2021-12-25 , DOI: 10.1021/acs.macromol.1c02187
Yang Liu ₁ , Kaihu Xian ₁ , Ruohua Gui ₂ , Kangkang Zhou ₁ , Junwei Liu ₁ , Mengyuan Gao ₁ , Wenchao Zhao ₃ , Xuechen Jiao ₄ , Yunfeng Deng ₁ , Hang Yin ₂ , Yanhou Geng _{1,

5} , Long Ye _{1,

6}

Affiliation

Poly(3-alkylthiophene)s are the most extensively studied polymeric materials in organic and hybrid solar cells due to the unique advantages of extremely low cost in material synthesis. However, the inferior power conversion efficiencies (PCEs) are still the main obstacle in the commercial applications of poly(3-alkylthiophene)-based solar cells. In this contribution, the carbon chain length of poly(3-alkylthiophene) is modulated to reveal its impact on the molecular packing and charge transport behaviors in neat films and bulk heterojunction films with nonfullerene small-molecule acceptors for the first time. The odd–even effect can be clearly observed in poly(3-alkylthiophene):ZY-4Cl bulk heterojunction films, which has a great impact on the charge transport behavior and device performance. The poly(3-pentylthiophene) (P3PT) cell achieves a significantly high PCE of nearly 10% and a desirable fill factor of ∼71%, which are the highest values of P3PT-based solar cells to date. The boosted efficiency is attributed to the altered van der Waals surfaces of alkyl segments through density functional theory calculation. This work reveals the odd–even effects of the carbon chain length modulation on the molecular packing and interaction of polythiophene:nonfullerene blends, which casts a new light on optimizing low-cost polythiophene solar cells and other promising electronics.

中文翻译：

通过聚（3-烷基噻吩）的碳链长度调节，简单的聚噻吩太阳能电池效率接近 10%

由于材料合成成本极低的独特优势，聚（3-烷基噻吩）是有机和混合太阳能电池中研究最广泛的聚合物材料。然而，较差的功率转换效率（PCE）仍然是聚（3-烷基噻吩）基太阳能电池商业应用的主要障碍。在这项贡献中，首次调节聚（3-烷基噻吩）的碳链长度以揭示其对纯薄膜和具有非富勒烯小分子受体的本体异质结薄膜中分子堆积和电荷传输行为的影响。在聚（3-烷基噻吩）：ZY-4Cl体异质结薄膜中可以清楚地观察到奇偶效应，这对电荷传输行为和器件性能有很大影响。聚（3-戊基噻吩）（P3PT）电池实现了接近 10% 的显着高 PCE 和 ∼71% 的理想填充因子，这是迄今为止基于 P3PT 的太阳能电池的最高值。提高的效率归因于通过密度泛函理论计算改变的烷基链段的范德华表面。这项工作揭示了碳链长度调制对聚噻吩：非富勒烯共混物的分子堆积和相互作用的奇偶效应，这为优化低成本聚噻吩太阳能电池和其他有前途的电子产品提供了新的思路。提高的效率归因于通过密度泛函理论计算改变的烷基链段的范德华表面。这项工作揭示了碳链长度调制对聚噻吩：非富勒烯共混物的分子堆积和相互作用的奇偶效应，这为优化低成本聚噻吩太阳能电池和其他有前途的电子产品提供了新的思路。提高的效率归因于通过密度泛函理论计算改变的烷基链段的范德华表面。这项工作揭示了碳链长度调制对聚噻吩：非富勒烯共混物的分子堆积和相互作用的奇偶效应，这为优化低成本聚噻吩太阳能电池和其他有前途的电子产品提供了新的思路。

更新日期：2022-01-11

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南