Carrier-selective p- and n-contacts for efficient and stable photocatalytic water reduction

Dowon Bae, Thomas Pedersen, Brian Seger, Beniamino Iandolo, Ole Hansen, Peter C. K. Vesborg, Ib Chorkendorff

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The successful realization of carrier-selective contacts for crystalline silicon (c-Si) based device for photocatalytic hydrogen production has been demonstrated. The proposed TiO2 protected carrier-selective contacts resemble a metal-oxide-semiconductor configuration, including a highly-doped nanocrystalline silicon (nc-Si) and a tunnel oxide, thereby form a heterostructure with the c-Si substrate. By substituting conventional pn+-junction Si by c-Si/SiOX/nc-Si structure for both front and back contacts we demonstrate a 16% increase in photovoltage (an open circuit voltage of 584 mV under AM 1.5G conditions). TiO2 protected carrier-selective photoelectrodes showed excellent long-term durability in acidic aqueous solution having stable photocurrent output for more than 40 days, implying that the proposed carrier-selective contact is a promising configuration to substitute for the conventional pn-junction based c-Si photocathodes.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalCatalysis Today
Volume290
Early online date15 Nov 2016
DOIs
Publication statusPublished - 15 Jul 2017

Keywords

  • Carrier-selective contact
  • Hydrogen evolution
  • Metal-oxide-semiconductor
  • Photocatalysis

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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