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Water Splitting: Why Tin‐Doping Enhances the Efficiency of Hematite Photoanodes for Water Splitting—The Full Picture (Adv. Funct. Mater. 52/2018)
Author(s) -
Hufnagel Alexander G.,
Hajiyani Hamidreza,
Zhang Siyuan,
Li Tong,
Kasian Olga,
Gault Baptiste,
Breitbach Benjamin,
Bein Thomas,
FattakhovaRohlfing Dina,
Scheu Christina,
Pentcheva Rossitza
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201870368
Subject(s) - materials science , doping , water splitting , tin , overpotential , hematite , nanotechnology , optoelectronics , chemical engineering , photocatalysis , metallurgy , chemistry , electrode , electrochemistry , catalysis , biochemistry , engineering
Photoelectrical water oxidation by photoanodes comprised of ultrathin hematite films is investigated by Christina Scheu, Rossitza Pentcheva, and co‐workers in article number 1804472 . It is determined that on‐surface tin doping prevents hole‐trapping and lowers the overpotential. Sub‐surface tin doping, provided the bulk remains undoped, introduces a band gradient, thereby enhancing charge separation efficiency. The results will be useful in developing high‐performance water splitting systems.