Band Edge Engineering of Oxide Photoanodes for Photoelectrochemical Water Splitting: Integration of Subsurface Dipoles with Atomic-Scale Control

Yasuyuki Hikita, Kazunori Nishio, Linsey C. Seitz, Pongkarn Chakthranont, Takashi Tachikawa, Thomas F. Jaramillo, Harold Y. Hwang

    研究成果: Article査読

    33 被引用数 (Scopus)

    抄録

    One of the crucial parameters dictating the efficiency of photoelectrochemical water-splitting is the semiconductor band edge alignment with respect to hydrogen and oxygen redox potentials. Despite the importance of metal oxides in their use as photoelectrodes, studies to control the band edge alignment in aqueous solution have been limited predominantly to compound semiconductors with modulation ranges limited to a few hundred mV. The ability to modulate the flat band potential of oxide photoanodes by as much as 1.3 V, using the insertion of subsurface electrostatic dipoles near a Nb-doped SrTiO3/aqueous electrolyte interface is reported. The tunable range achieved far exceeds previous reports in any semiconductor/aqueous electrolyte system and suggests a general design strategy for highly efficient oxide photoelectrodes.

    本文言語English
    論文番号1502154
    ジャーナルAdvanced Energy Materials
    6
    7
    DOI
    出版ステータスPublished - 2016 4 6

    ASJC Scopus subject areas

    • 再生可能エネルギー、持続可能性、環境
    • 材料科学(全般)

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