Solution-Mediated Hybrid FAPbI3 Perovskite Quantum Dots for Over 15% Efficient Solar Cell,Advanced Functional Materials

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Solution-Mediated Hybrid FAPbI3 Perovskite Quantum Dots for Over 15% Efficient Solar Cell
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-06-04 , DOI: 10.1002/adfm.202302542
Fangchao Li _{1,

2} , Xuliang Zhang _{1,

2} , Junwei Shi ₁ , Lujie Jin _{1,

3} , Jiawei Qiao ₄ , Junjun Guo _{1,

3} , Hang Yin ₄ , Youyong Li _{1,

3} , Jianyu Yuan _{1,

2} , Wanli Ma _{1,

3}

Affiliation

Organic–inorganic formamidinium lead triiodide (FAPbI₃) hybrid perovskite quantum dot (QD) is of great interest to photovoltaic (PV) community due to its narrow band gap, higher ambient stability, and long carrier lifetime. However, the surface ligand management of FAPbI₃ QD is still a key hurdle that impedes the design of high-efficiency solar cells. Herein, this study first develops a solution-mediated ligand exchange (SMLE) for preparing FAPbI₃ QD film with enhanced electronic coupling. By dissolving optimal methylammonium iodide (MAI) into antisolvent to treat the FAPbI₃ QD solution, the SMLE can not only effectively replace the long-chain ligands, but also passivate the A- and X-site vacancies. By combining experimental and theoretical results, this study demonstrates that the SMLE engineered FAPbI₃ QD exhibits lower defect density, which is beneficial for fabricating high-quality QD arrays with desired morphology and carrier transport. Consequently, the SMLE FAPbI₃ QD based solar cell outputs a champion efficiency of 15.10% together with improved long-term ambient storage stability, which is currently the highest reported value for hybrid perovskite QD solar cells. These results would provide new design principle of hybrid perovskite QDs toward high-performance optoelectronic application.

中文翻译：

溶液介导的混合 FAPbI3 钙钛矿量子点，效率超过 15% 的太阳能电池

有机-无机甲脒三碘化铅（FAPbI ₃）杂化钙钛矿量子点（QD）由于其窄带隙、较高的环境稳定性和较长的载流子寿命而引起光伏（PV）界的极大兴趣。_{然而，FAPbI 3} QD的表面配体管理仍然是阻碍高效太阳能电池设计的关键障碍。在此，本研究首先开发了一种溶液介导的配体交换（SMLE），用于制备具有增强电子耦合的FAPbI ₃ QD薄膜。通过将最佳碘化甲基铵 (MAI) 溶解到反溶剂中来处理 FAPbI ₃QD解决方案中，SMLE不仅可以有效取代长链配体，还可以钝化A位和X位空位。通过结合实验和理论结果，本研究表明，SMLE 工程 FAPbI ₃ QD 表现出较低的缺陷密度，这有利于制造具有所需形貌和载流子传输的高质量 QD 阵列。因此，基于 SMLE FAPbI ₃ QD 的太阳能电池输出了 15.10% 的冠军效率，同时改善了长期环境存储稳定性，这是目前混合钙钛矿 QD 太阳能电池的最高报告值。这些结果将为混合钙钛矿量子点的高性能光电应用提供新的设计原理。

更新日期：2023-06-04

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