Pyridyl-functionalized spiro[fluorene–xanthene] as a dopant-free hole-transport material for stable perovskite solar cells,Materials Chemistry Frontiers

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Pyridyl-functionalized spiro[fluorene–xanthene] as a dopant-free hole-transport material for stable perovskite solar cells
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2021-07-27 , DOI: 10.1039/d1qm00435b
B. Yadagiri _{1,

2} , Towhid H. Chowdhury ₃ , Yulu He ₃ , Ryuji Kaneko ₃ , Ashraful Islam ₃ , Surya Prakash Singh _{1,

2}

Affiliation

Hole-transport materials (HTMs) play a critical role in perovskite solar cells (PSCs) for achieving high efficiency and stability. Herein, we have designed and synthesized an HTM named SPS-SPX-2TPA and studied its photovoltaic performance for PSC applications. The molecule SPS-SPX-2TPA consists of pyridyl substitution at para-position attached with a spiro[fluorene-9,9′-xanthene] (SFX) moiety as a central core unit and finally end capped with an N,N-dimethoxytriphenylamine (TPA) moiety. The synthesized SPS-SPX-2TPA HTM is three times cheaper than the most commonly used Spiro-OMeTAD HTM. Mesoporous PSCs fabricated using SPS-SPX-2TPA as the HTM showed the best power conversion efficiency (PCE) of 17.39% and 16.22% (device area 0.10 cm²) in forward and reverse bias, respectively. Moreover, the SPS-SPX-2TPA-based PSCs showed a stable photovoltaic performance of up to 270 h when measured under light soaking and maintained 95% of their initial PCE even after 600 h when measured under maximum power point tracking conditions with high reproducibility.

中文翻译：

吡啶基官能化螺[芴-呫吨]作为稳定钙钛矿太阳能电池的无掺杂空穴传输材料

空穴传输材料 (HTM) 在钙钛矿太阳能电池 (PSC) 中发挥关键作用，以实现高效率和稳定性。在此，我们设计并合成了一种名为 SPS-SPX-2TPA 的 HTM，并研究了其在 PSC 应用中的光伏性能。分子 SPS-SPX-2TPA 由在对位的吡啶基取代与作为中心核心单元的螺[芴-9,9'-呫吨]（SFX）部分相连，最后以N , N-二甲氧基三苯胺封端（ TPA) 部分。合成的 SPS-SPX-2TPA HTM 比最常用的 Spiro-OMeTAD HTM 便宜三倍。使用 SPS-SPX-2TPA 作为 HTM 制造的介孔 PSC 显示出最佳功率转换效率 (PCE) 17.39% 和 16.22%（器件面积 0.10 cm ²) 分别处于正向和反向偏置。此外，基于 SPS-SPX-2TPA 的 PSC 在光浸泡下测量时表现出长达 270 小时的稳定光伏性能，并且在最大功率点跟踪条件下测量时，即使在 600 小时后仍保持其初始 PCE 的 95%，具有高重现性。

更新日期：2021-08-27

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