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Multi-Bandgap-Sensitized ZnO Nanorod Photoelectrode Arrays for Water Splitting: An X-ray Absorption Spectroscopy Approach for the Electronic Evolution under Solar Illumination

Chen, Hao Ming ; Chen, Chih Kai ; Lin, Chun Che ; Liu, Ru-Shi ; Yang, Heesun ; Chang, Wen-Sheng ; Chen, Kuei-Hsien ; Chan, Ting-Shan ; Lee, Jyh-Fu ; Tsai, Din Ping

The Journal of Physical Chemistry C, 11/10/2011, Vol.115(44), pp.21971-21980 [Periódico revisado por pares]

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  • Título:
    Multi-Bandgap-Sensitized ZnO Nanorod Photoelectrode Arrays for Water Splitting: An X-ray Absorption Spectroscopy Approach for the Electronic Evolution under Solar Illumination
  • Autor: Chen, Hao Ming ; Chen, Chih Kai ; Lin, Chun Che ; Liu, Ru-Shi ; Yang, Heesun ; Chang, Wen-Sheng ; Chen, Kuei-Hsien ; Chan, Ting-Shan ; Lee, Jyh-Fu ; Tsai, Din Ping
  • Assuntos: Chemistry
  • É parte de: The Journal of Physical Chemistry C, 11/10/2011, Vol.115(44), pp.21971-21980
  • Descrição: This investigation demonstrates an environmentally friendly inorganic light-harvesting nanostructure. This system provides a stable photoelectrochemical platform for the photolysis of water. The device is constructed by first building up an array of ZnO nanowires and then incorporating indium phosphide (InP) nanocrystals into them. A different-sized quantum dots (QDs) sensitization of the ZnO nanowire array for splitting water with a substantially enhanced photocurrent was demonstrated. InP QDs of various sizes are utilized as simultaneous sensitizers of the array of ZnO nanowires, and this multi-bandgap sensitization layer of InP QDs can harvest complementary solar light in the visible region while the ZnO nanostructures absorb the UV part of solar light. A photocurrent of 1.2 mA/cm2 at +1.0 V was observed; it was more than 108% greater than the photocurrent achieved by bare ZnO nanowires. Solar illumination measurements investigated the contribution from photoelectrochemical response and effect in unocc...
  • Idioma: Inglês

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