石墨烯
材料科学
碳纳米管
纳米技术
纳米复合材料
钙钛矿(结构)
纳米结构
混合太阳能电池
光伏
能量转换效率
碳纤维
化学工程
光伏系统
光电子学
聚合物太阳能电池
复合数
复合材料
工程类
生物
生态学
作者
A Amini,Hossein Abdizadeh,Mohammad Reza Golobostanfard
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2020-06-04
卷期号:3 (7): 6195-6204
被引量:15
标识
DOI:10.1021/acsaem.0c00200
摘要
The incorporation of carbon nanotubes (CNTs) and graphene, two amazing carbon nanostructures, in photovoltaics has drawn a lot of attention, especially as TiO2–CNT or TiO2–graphene nanocomposite photoanodes. In this study, we prepare a hybrid TiO2–CNT–graphene mesoporous thin film through a mixed-solvent and in situ hydrothermal synthesis, as well as an engineered two-step calcination process, and employ it as a photoanode in perovskite solar cells. The best-performance device (with 0.5 wt % (CNT + graphene)) shows a short-circuit current density of 24.8 mA cm–2, which is 43.4, 39.3, and 19.2% higher than that of bare TiO2-, TiO2–CNT-, and TiO2–graphene-based cells, respectively. Owing to the combination of high electron extraction ability of CNTs and enormously high specific surface area of graphene sheets confirmed by photoluminescence spectroscopy and photovoltage decay measurements, superior charge transport is provided in the photoanode system, resulting in this enhanced photovoltaic performance, with a power conversion efficiency of up to 13.97%. This work demonstrates that the simultaneous presence of graphene and CNT, instead of employing them individually, in a nanocomposite system with TiO2 is able to bring the field of charge collection studies in PSCs up to the mark.
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