Heterogeneous Doping to Improve the Performance of Thin Film Hematite Photoanodes for Solar Water Splitting
| Main Authors: | Asaf Kay, Daniel Grave, David Ellis, Hen Dotan, Avner Rothschild |
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| Format: | Article Journal |
| Terbitan: |
, 2016
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| Online Access: |
https://zenodo.org/record/1068983 |
Daftar Isi:
- Ti-doped, undoped, and Zn-doped hematite (-Fe2O3) thick (~1 m) films were found to be n-type, weak n-type, and p-type, respectively. Heterogeneous doping profiles were generated in 30 nm thick hematite stacks on F:SnO2 coated glass substrates with 25 nm thick SnO2 underlayers in order to investigate the effect of different doping profiles on photoelectrochemical performance and compare with homogenously-doped counterpart photoelectrodes. Among the homogenously-doped photoelectrodes, the Ti-doped sample displayed the highest plateau photocurrent but also the highest onset potential, whereas the Zn-doped one had the lowest onset potential and the lowest plateau photocurrent. Heterogeneouslydoped photoelectrodes displayed both high plateau photocurrent and low onset potential, with the highest performance achieved for the specimen with Ti-doped, undoped and Zn-doped layers at the bottom, center and top parts of the stack, respectively. This demonstrates the potential of heterogeneous doping to improve the performance of hematite photoelectrodes for solar water splitting. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/acsenergylett.6b00287