Enhancing the Performance of Perovskite Solar Cells by Extending the Terminal Conjugation of Spiro-Type Hole Transport Material

IF 6 3区工程技术 Q2 ENERGY & FUELS

Solar RRL Pub Date : 2024-12-02 DOI:10.1002/solr.202400700

Qian Wang, Yue Cao, Haokai Zhao, Botong Li, Xianfu Zhang, Xihong Ding, Ghadari Rahim, Hui Cao, Xuepeng Liu, Yong Ding, Songyuan Dai

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Abstract

Hole transport materials (HTM) play a vital role in the performance of perovskite solar cells (PSCs). Optimizing the molecular structure of HTMs has been proven to be an important method for improving PSCs’ efficiency and stability. Herein, a novel dibenzofuran-terminated spiro-type HTM with extending π-conjugation is designed and developed, named spiro-BNF. The structure–property relationship is also studied with spiro-OMeTAD and spiro-DBF as the reference. The results show that spiro-BNF has improved hole mobility and glass transition temperature (reaching 198 °C) than spiro-OMeTAD and spiro-BDF. spiro-BNF also exhibits matched highest occupied molecular orbital level with perovskite and superior morphology on the perovskite layer. Accordingly, the PSCs employing spiro-BNF display a higher power conversion efficiency of 23.65% and improved stability than the device employing spiro-OMeTAD or spiro-BDF. The findings provide a new insight for enhancing the performance of PSCs.

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通过扩展螺旋型空穴输运材料的末端共轭增强钙钛矿太阳能电池的性能

空穴输运材料在钙钛矿太阳能电池（PSCs）的性能中起着至关重要的作用。优化HTMs的分子结构已被证明是提高psc效率和稳定性的重要方法。本文设计并研制了一种具有扩展π共轭的双苯并呋喃端旋螺型HTM，命名为spiro-BNF。并以spiro-OMeTAD和spiro-DBF为参考，研究了其结构-性能关系。结果表明，螺柱- bnf比螺柱- ometad和螺柱- bdf具有更高的空穴迁移率和玻璃化转变温度（达到198℃）。spiro-BNF还表现出与钙钛矿匹配的最高占据分子轨道水平和钙钛矿层上优越的形态。因此，采用spiro-BNF的PSCs比采用spiro-OMeTAD或spiro-BDF的器件具有更高的功率转换效率（23.65%）和更高的稳定性。研究结果为提高PSCs的性能提供了新的见解。

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来源期刊

Solar RRL Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

12.10

自引率

6.30%

发文量

460

期刊介绍： Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.