Near infrared light induced plasmonic hot hole transfer at a nano-heterointerface

Zichao Lian, Masanori Sakamoto (), Hironori Matsunaga, Junie Jhon M. Vequizo, Akira Yamakata, Mitsutaka Haruta, Hiroki Kurata, Wataru Ota, Tohru Sato and Toshiharu Teranishi ()
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Zichao Lian: Kyoto University
Masanori Sakamoto: Kyoto University
Hironori Matsunaga: Toyota Technological Institute
Junie Jhon M. Vequizo: Toyota Technological Institute
Akira Yamakata: Toyota Technological Institute
Mitsutaka Haruta: Kyoto University
Hiroki Kurata: Kyoto University
Wataru Ota: Kyoto University
Tohru Sato: Kyoto University
Toshiharu Teranishi: Kyoto University

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Localized surface plasmon resonance (LSPR)-induced hot-carrier transfer is a key mechanism for achieving artificial photosynthesis using the whole solar spectrum, even including the infrared (IR) region. In contrast to the explosive development of photocatalysts based on the plasmon-induced hot electron transfer, the hole transfer system is still quite immature regardless of its importance, because the mechanism of plasmon-induced hole transfer has remained unclear. Herein, we elucidate LSPR-induced hot hole transfer in CdS/CuS heterostructured nanocrystals (HNCs) using time-resolved IR (TR-IR) spectroscopy. TR-IR spectroscopy enables the direct observation of carrier in a LSPR-excited CdS/CuS HNC. The spectroscopic results provide insight into the novel hole transfer mechanism, named plasmon-induced transit carrier transfer (PITCT), with high quantum yields (19%) and long-lived charge separations (9.2 μs). As an ultrafast charge recombination is a major drawback of all plasmonic energy conversion systems, we anticipate that PITCT will break the limit of conventional plasmon-induced energy conversion.

Date: 2018
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DOI: 10.1038/s41467-018-04630-w

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