石墨烯
色素敏化染料
碳纳米管
材料科学
吸附
混合材料
能量转换效率
电极
纳米技术
化学工程
碳纤维
复合材料
复合数
光电子学
化学
有机化学
电解质
工程类
物理化学
作者
Ming‐Yu Yen,Min‐Chien Hsiao,Shu-Hang Liao,Po‐I Liu,Han-Min Tsai,M. Chen‐Chi,Nen‐Wen Pu,Ming-Der Ger
出处
期刊:Carbon
[Elsevier]
日期:2011-09-01
卷期号:49 (11): 3597-3606
被引量:226
标识
DOI:10.1016/j.carbon.2011.04.062
摘要
This study employed a solution-based method to prepare a 3-D hybrid material comprising graphene and acid-treated multi-walled carbon nanotubes (MWCNTs). The adsorption of MWCNTs on graphene reduces the π–π interaction between graphene sheets resulting from steric hindrance, providing a subsequent reduction in aggregation. Optimal proportions of MWCNTs to graphene (2:1) enabled the even distribution of individual MWCNTs deposited on the surface of the graphene. The hybrid 3-D material was incorporated within a TiO2 matrix and used as a working electrode in dye-sensitized solar cells (DSSCs). The hybrid material provides a number of advantages over electrodes formed of either MWCNTs or graphene alone, including a greater degree of dye adsorption and lower levels of charge recombination. In this study, DSSCs incorporating 3-D structured hybrid materials demonstrated a conversion efficiency of 6.11%, which is 31% higher than that of conventional TiO2-based devices.
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