Interfacial Modification through a Multifunctional Molecule for Inorganic Perovskite Solar Cells with over 18% Efficiency,Solar RRL

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Interfacial Modification through a Multifunctional Molecule for Inorganic Perovskite Solar Cells with over 18% Efficiency
Solar RRL ( IF 6.0 ) Pub Date : 2020-06-05 , DOI: 10.1002/solr.202000205
Tiantian Liu ₁ , Jie Zhang ₁ , Xin Wu ₁ , Hongbin Liu ₂ , Fengzhu Li ₃ , Xiang Deng ₃ , Francis Lin ₁ , Xiaosong Li ₂ , Zonglong Zhu ₁ , Alex K.-Y. Jen _{1,

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Affiliation

A highly effective interface engineering approach uses a multifunctional molecule, 5‐amino‐2,4,6‐triiodoisophthalic acid (ATPA), to anchor on TiO₂ and CsPbI₃ simultaneously by reacting with dangling hydroxyl groups on TiO₂ surfaces and passivating the defects of CsPbI₃ films. In addition, the introduction of ATPA results in cascade energy‐level alignment between the perovskite and TiO₂ electron‐transporting layer (ETL) to improve the electron extraction property. Based on the ATPA‐modified TiO₂ substrates, optimized CsPbI₃ perovskite solar cells (PVSCs) deliver the highest power conversion efficiency (PCE) of over 18% with suppressed hysteresis. Moreover, the unencapsulated TiO₂/ATPA‐based devices exhibit much better long‐term stability and photostability than the only TiO₂‐based devices.

中文翻译：

通过多功能分子对无机钙钛矿太阳能电池进行界面改性，效率超过18％

高效的界面工程方法使用多功能分子5-氨基-2,4,6-三碘间苯二甲酸（ATPA）通过与TiO ₂表面上的悬空羟基反应并钝化缺陷而同时锚固在TiO ₂和CsPbI ₃上CsPbI ₃膜。此外，ATPA的引入导致钙钛矿和TiO ₂电子传输层（ETL）之间的级联能级对准，从而改善了电子提取性能。基于ATPA改性的TiO ₂基材，优化了CsPbI ₃钙钛矿太阳能电池（PVSC）具有超过18％的最高功率转换效率（PCE），并具有滞后现象。此外，未封装的基于TiO ₂ / ATPA的器件比仅基于TiO ₂的器件具有更好的长期稳定性和光稳定性。

更新日期：2020-06-05

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