Engineering Pyreno[1,2-b:8,7-b′]dithiophene-Based Conjugated Polymers for Efficient and Stable Perovskite Solar Cells

IF 5.1 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2024-11-16 DOI:10.1021/acs.macromol.4c02206

Yaohang Cai, Lifei He, Lingyi Fang, Yuyan Zhang, Jing Zhang, Yi Yuan, Peng Wang

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Abstract

The advancement of p-type conjugated polymers with optimized electrical properties, morphology, and heat tolerance is essential for n-i-p-type perovskite solar cells. Herein, we present a novel conjugated polymer, p-PDT₁₄4-E, composed of alternating units of 4,4,7,7-tetrakis(4-hexylphenyl)-4,7-dihydropyreno[1,2-b:8,7-b′]dithiophene (PDT₁₄4) and 3,4-ethylenedioxythiophene. This copolymer was synthesized via a palladium-catalyzed direct arylation polycondensation method. Compared to the corresponding homopolymer p-PDT₁₄4 synthesized by oxidative polymerization, p-PDT₁₄4-E exhibited an elevated highest occupied molecular orbital energy level, facilitating faster hole extraction and enhanced hole conductivity. Additionally, p-PDT₁₄4-E demonstrated an increased glass temperature and a more uniform film morphology. When used as a hole transport material along with the air doping promoter 4-(tert-butyl)pyridinium 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide, perovskite solar cells incorporating p-PDT₁₄4-E achieved an average power conversion efficiency (PCE) of 25.5%, surpassing reference cells using spiro-OMeTAD (average PCE of 24.7%) under identical conditions. Furthermore, p-PDT₁₄4-E-based cells exhibited excellent operational stability at 45 °C and thermal storage stability at 85 °C.

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基于芘[1,2-b:8,7-b′]二噻吩的共轭聚合物工程技术用于高效稳定的 Perovskite 太阳能电池

具有优化电性能、形态和耐热性的 p 型共轭聚合物对 ni-p 型过氧化物太阳能电池至关重要。在本文中，我们介绍了一种新型共轭聚合物 p-PDT144-E，它由 4,4,7,7-四（4-己基苯基）-4,7-二氢壬并[1,2-b:8,7-b′]二噻吩（PDT144）和 3,4-亚乙二氧基噻吩的交替单元组成。这种共聚物是通过钯催化的直接芳基化缩聚法合成的。与通过氧化聚合法合成的相应均聚物 p-PDT144 相比，p-PDT144-E 显示出更高的最高占据分子轨道能级，从而加快了空穴萃取速度并增强了空穴导电性。此外，p-PDT144-E 的玻璃化温度更高，薄膜形态更均匀。将 p-PDT144-E 与空气掺杂促进剂 4-（叔丁基）吡啶鎓 1,1,2,2,3,3-六氟丙烷-1,3-二磺酰亚胺一起用作空穴传输材料时，在相同条件下，采用 p-PDT144-E 的过氧化物太阳能电池的平均功率转换效率 (PCE) 达到 25.5%，超过了使用螺-OMeTAD 的参考电池（平均 PCE 为 24.7%）。此外，基于 p-PDT144-E 的电池在 45 °C 下具有出色的工作稳定性，在 85 °C 下具有出色的热存储稳定性。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.