材料科学
光伏系统
钙钛矿(结构)
碳纤维
氮气
纳米技术
化学工程
光电子学
复合材料
电气工程
有机化学
工程类
化学
复合数
作者
Igor V. Margaryan,Anna A. Vedernikova,L.N. Borodina,Natalya K. Kuzmenko,Aleksandra V. Koroleva,Е. В. Жижин,Xiaoyu Zhang,Elena V. Ushakova,Aleksandr P. Litvin,Wei Xing Zheng
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2024-07-29
卷期号:35 (43): 435705-435705
标识
DOI:10.1088/1361-6528/ad6870
摘要
Abstract Solution-processed perovskite solar cells (PSCs) have demonstrated a tremendous growth in power conversion efficiency (PCE). A high-quality, defect-free perovskite-based active layer is a key point to enhance PSC performance. Introduction of additives and interlayers have proved to be an effective tool to passivate surface defects, control crystal growth, and improve PSC stability. Antisolvent engineering has emerged recently as a new approach, which aims to adjust perovskite layer properties and enhance the PCE and stability of PSC devices. Here, we demonstrate that carbon dots (CDs) may serve as a prospective additive for antisolvent engineering. Nitrogen-rich amphiphilic CDs were synthesized from amines by a solvothermal method and used as an additive to chlorobenzene for a perovskite layer fabrication. The interaction between perovskite and functional groups in CDs promotes improved crystallization of an active perovskite layer and defects passivation, bringing higher PSCs efficiency, stability, and suppressed hysteresis. Under optimized CD concentration, the maximum PCE increased by 34% due to the improved short-circuit current and fill factor, and the device maintains 87% of its initial efficiency after 6 d of storage under ambient conditions.
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