Gkini Konstantina, Martinaiou Ioanna, Falaras Polycarpos
Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Agia Paraskevi Attikis, 15341 Athens, Greece.
Physics Department, School of Natural Sciences, University of Patras, 26504 Patras, Greece.
Materials (Basel). 2021 Mar 29;14(7):1679. doi: 10.3390/ma14071679.
Perovskite solar cells (PSCs) have attracted great research interest in the scientific community due to their extraordinary optoelectronic properties and the fact that their power conversion efficiency (PCE) has increased rapidly in recent years, surpassing other 3rd generation photovoltaic (PV) technologies. Graphitic carbon nitride (g-CN) presents exceptional optical and electronic properties and its use was recently expanded in the field of PSCs. The addition of g-CN in the perovskite absorber and/or the electron transport layer (ETL) resulted in PCEs exceeding 22%, mainly due to defects passivation, improved conductivity and crystallinity as well as low charge carriers' recombination rate within the device. Significant performance increase, including stability enhancement, was also achieved when g-CN was applied at the PSC interfaces and the observed improvement was attributed to its wetting (hydrophobic/hydrophilic) nature and the fine tuning of the corresponding interface energetics. The current review summarizes the main innovations for the incorporation of graphitic carbon nitride in PSCs and highlights the significance and perspectives of the g-CN approach for emerging highly efficient and robust PV devices.
钙钛矿太阳能电池（PSCs）因其卓越的光电性能以及近年来其功率转换效率（PCE）迅速提高，超过了其他第三代光伏（PV）技术，而在科学界引起了极大的研究兴趣。石墨相氮化碳（g-CN）具有优异的光学和电子性能，其应用最近在PSCs领域得到了扩展。在钙钛矿吸收层和/或电子传输层（ETL）中添加g-CN导致PCE超过22%，这主要归因于缺陷钝化、导电性和结晶度的提高以及器件内低电荷载流子复合率。当g-CN应用于PSC界面时，还实现了显著的性能提升，包括稳定性增强，观察到的性能改善归因于其润湿性（疏水/亲水）以及相应界面能量的微调。本综述总结了将石墨相氮化碳纳入PSCs的主要创新点，并强调了g-CN方法对于新兴高效且稳健的光伏器件的重要性和前景。
