Incorporation of Graphene to Fullerene Clusters and Fullerene-Nanotube Composites and Their Photoelectrochemical Properties
Incorporation of Graphene to Fullerene Clusters and Fullerene-Nanotube Composites and Their Photoelectrochemical Properties
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DOI：
10.1149/2.001310jss
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发表时间：
2013
影响因子：
2.2
通讯作者：
T. Umeyama;Jinseok Baek;Noriyasu Tezuka;Kazuki Morita;H. Imahori
中科院分区：
文献类型：
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作者：
T. Umeyama;Jinseok Baek;Noriyasu Tezuka;Kazuki Morita;H. Imahori
具有高溶解度的功能化化学转化石墨烯（f-CCG）被纳入富勒烯C60簇和功能化单壁碳纳米管（f-SWNT）-富勒烯C70杂化簇，首次在溶液工艺中形成二元（即石墨烯和富勒烯）和三元（即石墨烯、富勒烯和碳纳米管）纳米碳复合材料。复合材料的电泳沉积产生了相应的薄膜，用于光电化学器件的纳米结构 SnO2 电极。具有优化重量比的 f-CCG−C60 复合材料的器件表现出比 C60 单组分簇（5.1%）更高的入射光子电流效率（IPCE）值（400 nm 处为 6.0%）。 C60团簇和f-CCG之间的电子通信可以促进电子传输到SnO2电极。然而，将f-CCG掺入f-SWNT-C70团簇对光电流产生效率产生了不利影响，因为f-CCG抑制了f-SWNT-C70团簇构建的多孔网络结构的形成。这里获得的这些结果将为全纳米碳材料组成的光电器件的设计提供有价值的信息。
Functionalized chemically converted graphene (f-CCG) with high solubility has been incorporated into fullerene C60 cluster and functionalized single-walled carbon nanotubes (f-SWNT)−fullerene C70 hybrid cluster to form binary (i.e., graphene and fullerene) and ternary (i.e., graphene, fullerene, and carbon nanotubes) nanocarbon composites in solution processes for the first time. ElectrophoreticdepositionofthecompositesyieldedthecorrespondingfilmsonnanostructuredSnO2 electrodesforphotoelectrochemical devices. The device with the f-CCG−C60 composites with an optimized weight ratio exhibited a higher incident photon-to-current efficiency (IPCE) value (6.0% at 400 nm) than that with the C60 single-component cluster (5.1%). Electronic communication between C60 clusters and f-CCG may facilitate the electron transport to the SnO2 electrode. However, the incorporation of f-CCG into f-SWNT−C70 cluster made an adverse effect on photocurrent generation efficiencies because f-CCG inhibited formation of the porous network structure constructed by the f-SWNT−C70 clusters. These results obtained here will provide valuable information on the design of optoelectronic devices composed of all-nanocarbon materials.