The high-efficiency (17.1%) WSe2photo-electrochemical solar cell
- 14 June 1988
- journal article
- letter
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 21 (6) , 1028-1030
- https://doi.org/10.1088/0022-3727/21/6/029
Abstract
WSe2 crystals (photo-electrodes) have been grown via a vapour transport technique, employing SeCl4 as transporter photo-electrochemical (PEC) solar cells with n-WSe2/I-, I2/Pt have been fabricated. In order to improve upon the efficiency, the effective WSe2 crystal surfaces have been etched in aqua-regia. The authors have obtained a high PEC conversion efficiency, up to 17.1%. This corresponds to the most efficient WSe2-based PEC solar cell reported so far. Evidence and arguments have been presented to show that the high efficiency ( approximately 17.1%) is achieved due to the combined effect of improved crystal quality, obtained through a SeCl4 transporter, and a decrease in the density of surface steps consequent to photo-etching.Keywords
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