Clear and transparent nanocrystals for infrared-responsive carrier transfer

Masanori Sakamoto (), Tokuhisa Kawawaki, Masato Kimura, Taizo Yoshinaga, Junie Jhon M. Vequizo, Hironori Matsunaga, Chandana Sampath Kumara Ranasinghe, Akira Yamakata, Hiroyuki Matsuzaki, Akihiro Furube and Toshiharu Teranishi ()
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Masanori Sakamoto: Kyoto University, Gokasho
Tokuhisa Kawawaki: Kyoto University, Gokasho
Masato Kimura: Kyoto University, Gokasho
Taizo Yoshinaga: University of Tsukuba
Junie Jhon M. Vequizo: Graduate School of Engineering, Toyota Technological Institute
Hironori Matsunaga: Graduate School of Engineering, Toyota Technological Institute
Chandana Sampath Kumara Ranasinghe: Graduate School of Engineering, Toyota Technological Institute
Akira Yamakata: Graduate School of Engineering, Toyota Technological Institute
Hiroyuki Matsuzaki: National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2
Akihiro Furube: Tokushima University
Toshiharu Teranishi: Kyoto University, Gokasho

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract 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.

Date: 2019
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DOI: 10.1038/s41467-018-08226-2

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