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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, 3, 4
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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