二聚体受体中功能化π桥实现高性能有机太阳能电池

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-05-03 DOI:10.1016/j.nanoen.2025.111085

Xiangyu Shen , Waqar Ali Memon , Hanjian Lai , Yunpeng Wang , Shilong Xiong , Meihong Ou , Ruoxi Sun , Nan Zheng , Feng He

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引用次数: 0

摘要

选择合适的功能性π桥对于提高二聚小分子受体（dsma）的性能至关重要。在这项工作中，我们合成了三种含有不同π桥的dsma （DTY-V与乙烯基连接，DTY-A与乙炔连接，DTY-T与噻吩连接），并研究了π桥修饰对其光伏性能的影响。其中，DTY-A具有最强的光吸收性、致密的分子间填充性和最佳的给受体混溶性。这些特性有助于更有效的激子解离和增强活性层内的电子传递途径，从而同时提高电流密度和填充因子。因此，基于D18:DTY-A的准平面异质结（Q-PHJ）器件获得了18.30%的功率转换效率（PCE），并且具有出色的照明稳定性，在1600小时的光照后保持了85%以上的初始效率。本研究系统比较了三种常用的功能性π桥对光伏性能的影响，为未来二聚受体分子框架的设计和优化提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Functionalized π-bridges in dimerized acceptors enable high-performance organic solar cells

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Functionalized π-bridges in dimerized acceptors enable high-performance organic solar cells

The selection of suitable functional π-bridges is crucial for enhancing the performance of dimerized small molecular acceptors (DSMAs). In this work, we synthesized three DSMAs incorporating different π-bridges (DTY-V with a vinyl linker, DTY-A with an acetylene linker, and DTY-T with a thiophene linker), and investigated how π-bridge modifications influence their photovoltaic performance. Among them, DTY-A demonstrated the strongest light absorption, compact intermolecular packing, and the best donor-acceptor miscibility. These characteristics facilitated more efficient exciton dissociation and enhanced electron transport pathways within the active layer, leading to simultaneous improvements in both current density and fill factor. As a result, the quasiplanar heterojunction (Q-PHJ) device based on D18:DTY-A achieved an outstanding power conversion efficiency (PCE) of 18.30 % along with excellent illumination stability, retaining over 85 % of its initial efficiency after 1600 hours of light exposure. This study systematically compares the effects of three commonly used functional π-bridges on photovoltaic performance, providing valuable insights for the future design and optimization of dimerized acceptor molecular frameworks.

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.