Issue 40, 2014

Effect of metal doping, doped structure, and annealing under argon on the properties of 30 nm thick ultrathin hematite photoanodes

Abstract

The doping of the whole hematite layer with W (9.4%) and the additional doping of the bottom half of the W-doped hematite layer with Sn (8.6%), and the subsequent annealing under argon at 600 °C give rise to large increases in the Fe2+ concentration (by >∼200 times), carrier density (Cd, by ∼48 times) and current density (id, by ∼8 times at 1.23 V vs. RHE, under 1 sun) with respect to those of bare hematite photoanodes. The measured id (0.9 mA cm−2) is the highest among those of the ultrathin hematite photoanodes and the measured Cd (3.8 × 1022 cm−3) is the highest among those ever observed for hematite.

Graphical abstract: Effect of metal doping, doped structure, and annealing under argon on the properties of 30 nm thick ultrathin hematite photoanodes

Article information

Article type
Communication
Submitted
24 Jun 2014
Accepted
11 Aug 2014
First published
11 Aug 2014

Phys. Chem. Chem. Phys., 2014,16, 21936-21940

Author version available

Effect of metal doping, doped structure, and annealing under argon on the properties of 30 nm thick ultrathin hematite photoanodes

T. Kim, H. S. Kim, I. Hwang and K. B. Yoon, Phys. Chem. Chem. Phys., 2014, 16, 21936 DOI: 10.1039/C4CP02765E

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