Demonstration of Ultrarapid Interfacial Formation of 1D Fullerene Nanorods with Photovoltaic Properties

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• 作者：Rekha Goswami Shrestha ; Lok Kumar Shrestha ; Ali Hossain Khan ; Gundam Sandeep Kumar ; Somobrata Acharya ; Katsuhiko Ariga
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：September 10, 2014
• 年：2014
• 卷：6
• 期：17
• 页码：15597-15603
• 全文大小：412K
• ISSN：1944-8252

文摘

We demonstrate ultrarapid interfacial formation of one-dimensional (1D) single-crystalline fullerene C₆₀ nanorods at room temperature in 5 s. The nanorods of 鈭?1 渭m in length and 鈭?15 nm in diameter are developed in a hexagonal close-pack crystal structure, contrary to the cubic crystal structure of pristine C₆₀. Vibrational and electronic spectroscopy provide strong evidence that the nanorods are a van der Waals solid, as evidenced from the preservation of the electronic structure of the C₆₀ molecules within the rods. Steady state optical spectroscopy reveals a dominance of charge transfer excitonic transitions in the nanorods. A significant enhancement of photogenerated charge carriers is observed in the nanorods in comparison to pristine C₆₀, revealing the effect of shape on the photovoltaic properties. Due to their ultrarapid, large-scale, room-temperature synthesis with single-crystalline structure and excellent optoelectronic properties, the nanorods are expected to be promising for photosensitive devices applications.

Keywords:

fullerene single-crystal nanorods; ultrarapid crystal formation; liquid鈭抣iquid interfacial precipitation; photoluminescence; photovoltaic properties