Publications
ResearcherID : C-5956-2008 (TY, h-index: 24) , AAZ-8749-2021 (RK, h-index: 11)
Google Scholar : TY (h-index: 34), RK (h-index: 11)
2014
Takashi Yatsui, Tsubasa Imoto, Takahiro Mochizuki, Kokoro Kitamura, Tadashi Kawazoe
Dressed-photon–phonon (DPP)-assisted visible- and infrared-light water splitting Journal Article
In: Scientific Reports, vol. 4, pp. 4561, 2014.
Abstract | Links | BibTeX | Tags: First, Non-uniform optical near field, Water splitting, ZnO
@article{2014water,
title = {Dressed-photon–phonon (DPP)-assisted visible- and infrared-light water splitting},
author = {Takashi Yatsui and Tsubasa Imoto and Takahiro Mochizuki and Kokoro Kitamura and Tadashi Kawazoe},
doi = {10.1038/srep04561},
year = {2014},
date = {2014-04-01},
journal = {Scientific Reports},
volume = {4},
pages = {4561},
publisher = {Springer Nature},
abstract = {A dressed-phonon–phonon (DPP) assisted photocatalyst reaction was carried out to increase the visible light responsibility, where the photon energy of the radiation, which ranged from visible to infrared light is less than band gap energy of the photocatalyst (ZnO, 3.3 eV). The dependence of the photocurrent on excitation power indicated that two-step excitation occurred in DPP-assisted process. A cathodoluminescence measurement also supported the conclusion that the visible- and infrared-light excitation originated from DPP excitation, not from defect states in the ZnO nanorod photocatalyst.},
keywords = {First, Non-uniform optical near field, Water splitting, ZnO},
pubstate = {published},
tppubtype = {article}
}
A dressed-phonon–phonon (DPP) assisted photocatalyst reaction was carried out to increase the visible light responsibility, where the photon energy of the radiation, which ranged from visible to infrared light is less than band gap energy of the photocatalyst (ZnO, 3.3 eV). The dependence of the photocurrent on excitation power indicated that two-step excitation occurred in DPP-assisted process. A cathodoluminescence measurement also supported the conclusion that the visible- and infrared-light excitation originated from DPP excitation, not from defect states in the ZnO nanorod photocatalyst.
2011
Thu Hac Huong Le, Kazuma Mawatari, Yuriy Pihosh, Tadashi Kawazoe, Takashi Yatsui, Motoichi Ohtsu, Masahiro Tosa, Takehiko Kitamori
Optical near-field induced visible response photoelectrochemical water splitting on nanorod TiO2 Journal Article
In: Applied Physics Letters, vol. 99, no. 21, pp. 213105, 2011.
Abstract | Links | BibTeX | Tags: nanorod, Near-field effect, TiO2, Water splitting
@article{doi:10.1063/1.3663632,
title = {Optical near-field induced visible response photoelectrochemical water splitting on nanorod TiO2},
author = {Thu Hac Huong Le and Kazuma Mawatari and Yuriy Pihosh and Tadashi Kawazoe and Takashi Yatsui and Motoichi Ohtsu and Masahiro Tosa and Takehiko Kitamori},
url = {https://doi.org/10.1063/1.3663632},
doi = {10.1063/1.3663632},
year = {2011},
date = {2011-11-01},
urldate = {2011-11-01},
journal = {Applied Physics Letters},
volume = {99},
number = {21},
pages = {213105},
abstract = {Here we report a way to induce the visible response of non-doped TiO2 in the photocatalytic electrochemical water splitting, which is achieved by utilizing the optical near-field (ONF) generated on nanorod TiO2. The visible response is attributed to the ONF-induced phonon-assisted excitation process, in which TiO2 is excited by sub-bandgap photons via phonon energy. Our approach directly gets involved in the excitation process without chemical modification of materials; accordingly it is expected to have few drawbacks on the photocatalytic performance. This study may offer another perspective on the development of solar harvesting materials.},
keywords = {nanorod, Near-field effect, TiO2, Water splitting},
pubstate = {published},
tppubtype = {article}
}
Here we report a way to induce the visible response of non-doped TiO2 in the photocatalytic electrochemical water splitting, which is achieved by utilizing the optical near-field (ONF) generated on nanorod TiO2. The visible response is attributed to the ONF-induced phonon-assisted excitation process, in which TiO2 is excited by sub-bandgap photons via phonon energy. Our approach directly gets involved in the excitation process without chemical modification of materials; accordingly it is expected to have few drawbacks on the photocatalytic performance. This study may offer another perspective on the development of solar harvesting materials.