MSTC中的磺酰基和羰基有效提高钙钛矿太阳能电池的性能和稳定性,Solar RRL

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MSTC中的磺酰基和羰基有效提高钙钛矿太阳能电池的性能和稳定性
Solar RRL ( IF 6.0 ) Pub Date : 2021-11-13 , DOI: 10.1002/solr.202100731
Ruonan Zhou ₁ , Xingchong Liu ₁ , Haimin Li ₁ , Hanyu Wang ₁ , Yukun Ouyang ₁ , Xiaoli Gong ₁ , Xian Peng ₁ , Huxin Luo ₁ , Yafei Ni ₁ , Wenjing Zou ₁ , Yue Lei ₁

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内在缺陷是影响钙钛矿太阳能电池（PSC）性能和稳定性的关键因素。在此，将磺胺类添加剂 3-氨磺酰基-2-噻吩甲酸甲酯 (MSTC) 引入 PbI ₂或 FAI/MACl/MABr 前体溶液，通过两步法制备高质量的 PSC。加入 MSTC 后，所有设备均表现出增强的性能。将优化的 MSTC 纳入 PSC 后，PSC 的冠军功率转换效率（PCE）从 19.19% 提高到 22.14%，稳定性也有所提高。基于 MSTC-FAI 的设备仍然可以保持其初始 PCE 的 89%，而在环境条件下，在 40-50% 的相对湿度下，在黑暗的室温下，在环境条件下 15 天后，其初始 PCE 为 68%。测试结果表明MSTC中的氨基基团与PbI _{2 配合}或通过氢键（NH···I）的FAI，从而有效地提高器件的性能。然而，MSTC 中的磺酰基和羰基会通过 C  O  S 和 C  O  C 的化学键与 FAI 前体配位。而 MSTC 和 FAI 之间的氢键连接，是 MSTC-FAI 的固有缺陷。基于器件的器件被有效抑制，从而提高了光伏性能。

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Sulfonyl and Carbonyl Groups in MSTC Effectively Improve the Performance and Stability of Perovskite Solar Cells

Intrinsic defects are key factors that would affect the performance and stability of perovskite solar cells (PSCs). Herein, a sulfonamides additive, methyl 3-sulfamoyl-2-thiophenecarboxylate (MSTC), is introduced into the PbI₂ or FAI/MACl/MABr precursor solution, to prepare high-quality PSCs with a two-step method. After the addition of MSTC, all the devices show enhanced performance. With optimized MSTC incorporated into PSCs, the champion power conversion efficiency (PCE) of the PSCs is increased from 19.19% to 22.14%, and the stability is also improved. The MSTC-FAI based device can still maintain 89% of its initial PCE compared to 68% of the control one after 15 days in ambient condition under relative humidity of 40–50% at room temperature in dark. Test results reveal that amido group in MSTC would coordinate with PbI₂ or FAI through hydrogen bonding (NH···I), thus effectively enhancing the performance of devices. Nevertheless, the sulfonyl and carbonyl groups in MSTC would coordinate with the FAI precursor through chemical bond of COS and COC. And with the hydrogen bonding connection between MSTC and FAI, the inherent defects in the MSTC-FAI based device are effectively suppressed, leading to the enhanced photovoltaic performance.

更新日期：2022-01-08

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