The influence of polarity of electrodeposited Cu2O thin films on the photoelectrochemical performance
- Authors
- Kim, Misung; Yoon, Sanghwa; Jung, Hyunsung; Lee, Kun-Jae; Lim, Dong-Chan; Kim, In-Soo; Yoo, Bongyoung; Lim, Jae-Hong
- Issue Date
- Aug-2014
- Publisher
- IOP Publishing Ltd
- Keywords
- WATER REDUCTION; PHOTOCATHODE; CUPROUS-OXIDE; SOLAR-CELL; SHAPE CONTROL
- Citation
- Japanese Journal of Applied Physics, v.53, no.8, pp.1 - 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- Japanese Journal of Applied Physics
- Volume
- 53
- Number
- 8
- Start Page
- 1
- End Page
- 4
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/22338
- DOI
- 10.7567/JJAP.53.08NJ01
- ISSN
- 0021-4922
- Abstract
- Both polar and non-polar Cu2O thin films were electrodeposited in electrolytes of different pH, and their photoelectrochemical activities in water were analyzed. The surface morphology of these tailored-polarity Cu2O films was analyzed by field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD), and their photoactivity was characterized through photoluminescence and Mott-Schottky measurement of the defect structure, diffusion length, carrier concentration, and charge separation. Through this, the tetrahedral surface morphology of a polar Cu2O thin film was found to exhibit a higher photocurrent in the visible spectrum than the pyramidal surface morphology of a non-polar Cu2O film. Furthermore, the higher flat-band potential and carrier concentration identified in the polar Cu2O by Mott-Schottky analysis was found to result in a higher charge separation. (C) 2014 The Japan Society of Applied Physics
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