Clear and transparent nanocrystals for infrared-responsive carrier transfer
Clear and transparent nanocrystals for infrared-responsive carrier transfer
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DOI：
10.1038/s41467-018-08226-2
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发表时间：
2019-01
影响因子：
16.6
通讯作者：
M. Sakamoto;T. Kawawaki;M. Kimura;Taizo Yoshinaga;J. Vequizo;H. Matsunaga;C. S. K. Ranasinghe;Akira Yamakata;H. Matsuzaki;A. Furube;T. Teranishi
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文献类型：
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作者：
M. Sakamoto;T. Kawawaki;M. Kimura;Taizo Yoshinaga;J. Vequizo;H. Matsunaga;C. S. K. Ranasinghe;Akira Yamakata;H. Matsuzaki;A. Furube;T. Teranishi
红外光诱导载流子传输是信息通信系统和能源设备“不可见”光学器件的关键技术。然而，据我们所知，透明且无色的光诱导载流子转移尚未在光化学领域得到证实。在这里，我们通过采用短波长红外（1400-4000 nm）局域表面等离子体共振诱导的电子从氧化铟锡纳米晶体注入透明金属氧化物来解决这个问题。时间分辨红外测量使这个不可见系统中载体的动态可视化。局部表面等离子共振的选择性激发导致热电子注入效率高（33%）和长寿命电荷分离（~ 2–200 μs）。我们预计我们的研究不仅为等离子体载流子转移系统提供突破，而且还可能刺激最先进的不可见光学设备的发明。
Infrared-light-induced carrier transfer is a key technology for ‘invisible’ optical devices for information communication systems and energy devices. However, clear and colourless photo-induced carrier transfer has not yet been demonstrated in the field of photochemistry, to the best of our knowledge. Here, we resolve this problem by employing short-wavelength-infrared (1400–4000 nm) localized surface plasmon resonance-induced electron injection from indium tin oxide nanocrystals to transparent metal oxides. The time-resolved infrared measurements visualize the dynamics of the carrier in this invisible system. Selective excitation of localized surface plasmon resonances causes hot electron injection with high efficiency (33%) and long-lived charge separation (~ 2–200 μs). We anticipate our study not only provides a breakthrough for plasmonic carrier transfer systems but may also stimulate the invention of state-of-the-art invisible optical devices.