Dual-Site Crystallization Regulation for Highly Efficient and Stable Perovskite Solar Cells

IF 4.1 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Electron Device Letters Pub Date : 2024-09-11 DOI:10.1109/LED.2024.3458056

Jianing Xi;Yi Zhang;Hanxiao Gao;Zhuowei Li;Chunyu Liu;Wenbin Guo

引用次数: 0

Abstract

Two-step sequential deposition method has been widely used to fabricate high-performance FAPbI3-based perovskite solar cells (PSCs). However, fast reaction between FAI and PbI2 always leads to an incomplete reaction and poor crystal quality. Here, 1-ethyl-3-methylimidazolium trifluoroacetate (EMIMTFA) is added to the FAI precursor solution, so as to regulate the crystallization behavior and obtain high-quality FAPbI3 perovskite films. The EMIMTFA can chemically interact simultaneously with FAI and PbI2, which will slow down the crystallization process of the perovskite film, achieving enlarged grain size, enhanced orientation and minimized defects, as well as less PbI2 residue. As a result, the PSCs with EMIMTFA achieve a champion efficiency of 24.31%, maintaining 90% of their initial efficiency after 1000 h under dark conditions in a N2-filled glove box. This study provides an efficient dual-site crystallization regulation strategy for the growth of high-quality FAPbI3 films.

查看原文本刊更多论文

高效稳定的 Perovskite 太阳能电池的双位结晶调节技术

两步顺序沉积法已被广泛用于制造基于 FAPbI3 的高性能过氧化物太阳能电池（PSC）。然而，FAI 和 PbI2 之间的快速反应总是导致反应不完全和晶体质量差。在这里，1-乙基-3-甲基咪唑三氟乙酸盐（EMIMTFA）被添加到 FAI 前驱体溶液中，从而调节结晶行为，获得高质量的 FAPbI3 包晶体薄膜。EMIMTFA 可同时与 FAI 和 PbI2 发生化学作用，从而减缓包晶体薄膜的结晶过程，达到增大晶粒尺寸、增强取向和减少缺陷以及减少 PbI2 残留的目的。因此，含有 EMIMTFA 的 PSCs 达到了 24.31% 的冠军效率，在充满 N2 的手套箱中黑暗条件下 1000 小时后仍能保持 90% 的初始效率。这项研究为高质量 FAPbI3 薄膜的生长提供了一种高效的双位结晶调节策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Electron Device Letters 工程技术-工程：电子与电气

CiteScore

8.20

自引率

10.20%

发文量

551

审稿时长

1.4 months

期刊介绍： IEEE Electron Device Letters publishes original and significant contributions relating to the theory, modeling, design, performance and reliability of electron and ion integrated circuit devices and interconnects, involving insulators, metals, organic materials, micro-plasmas, semiconductors, quantum-effect structures, vacuum devices, and emerging materials with applications in bioelectronics, biomedical electronics, computation, communications, displays, microelectromechanics, imaging, micro-actuators, nanoelectronics, optoelectronics, photovoltaics, power ICs and micro-sensors.