A WSe2/MoSe2 heterostructure photovoltaic device
Abstract
We report on the photovoltaic effect in a WSe2/MoSe2 heterojunction, demonstrating gate tunable current rectification with on/off ratios of over 104. Spatially resolved photocurrent maps show the photovoltaic effect to originate from the entire overlap region. Compared to WSe2/MoS2 heterostructures, our devices perform better at long wavelengths and yield higher quantum efficiencies, in agreement with Shockley-Queisser theory.
- Publication:
-
Applied Physics Letters
- Pub Date:
- September 2015
- DOI:
- 10.1063/1.4931621
- Bibcode:
- 2015ApPhL.107l3106F