In Situ Electron Transport Layers by a Carboxyl Ionic Liquid-Assisted Microwave Technique for a 20.1% Perovskite Solar Cell
In Situ Electron Transport Layers by a Carboxyl Ionic Liquid-Assisted Microwave Technique for a 20.1% Perovskite Solar Cell
复制标题
In%20Situ%20Electron%20Transport%20Layers%20by%20a%20Carboxyl%20Ionic%20Liquid-Assisted%20Microwave%20Technique%20for%20a%2020.1%%20Perovskite%20Solar%20Cell
DOI：
10.1021/acsaem.1c01596
复制
发表时间：
2021
影响因子：
6.4
通讯作者：
Suojiang Zhang
中科院分区：
文献类型：
--
作者：
Lu Wang;Qingqing Miao;Zhicheng Sun;Hengyuan Zhang;Zhonglin Liu;Gongtang Wang;Suojiang Zhang
高质量的电子传输层(ETL)在钙钛矿型太阳能电池(PSCs)中起着不可或缺的作用。理想的ETL应该具有制备温度低、制备工艺简单、质量高、电子传输能力快等特点。然而，常用的ETL的传统制备方法都存在制备过程繁琐、温度高、时间长等问题。在本工作中，一种简单的原位羧基离子液体(IL)辅助微波技术被成功地应用于PSCS的TiO2基混合高质量ETL。原位IL-辅助ETL直接用钛源溶液低温短时间处理。基于二氧化钛的混合ETL最终实现了超过20%的高效率，与原始器件相比大幅提高了20.8%。系统地阐述了离子液体在原位微波技术中的积极作用，原位二氧化钛的相关性质和光伏性能，ETLS/IL-Ti02和ETLS/IL-TiO2基杂化ETL的结构、电荷的提取、转移、复合等有利影响。这些结果为制备高质量的ETL和高效的PSCs提供了一种简单、绿色的合成技术和有效的策略。
A high-quality electron transport layer (ETL) plays an indispensable role in perovskite solar cells (PSCs). An ideal ETL should possess the features of low-temperature fabrication, simple preparation process, high quality, fast electron transport ability, and so forth. However, the traditional preparation methods of the commonly used ETLs always involve a tedious procedure, high temperature, long time, and so forth. In this work, a simple in situ carboxyl ionic liquid (IL)-assisted microwave technique was successfully developed for TiO2-based hybrid high-quality ETLs of PSCs. The in situ IL-assisted ETLs were processed directly by the Ti-source solution at a low temperature and a short time. The TiO2-based hybrid ETL finally achieved a high efficiency exceeding 20%, which was greatly improved by 20.8% compared with the pristine device. The systematic mechanism investigations were clarified, such as the positive effects of ILs in the in situ microwave technique, the related properties and photovoltaic performances of the in situ TiO2, ETLs/IL-TiO2, and ETLs/IL-TiO2-based hybrid ETL, the beneficial influences of the hybrid structure, the charge extraction, transfer, recombination, and so forth. These results provide a simple, green synthesis technique and effective strategy for a high-quality ETL and highly efficient PSCs.