Minglei Sun, U. Schwingenschlögl
Oct 9, 2020
Citations
1
Influential Citations
52
Citations
Journal
Physical Review Applied
Abstract
We propose a two-dimensional material, \ensuremath{\delta}-CS, and show that it is a direct-band-gap semiconductor with strong absorption of solar radiation. Power conversion efficiencies of 7.0% to 20.1% are predicted for solar cells with \ensuremath{\delta}-CS as a donor and a transition metal dichalcogenide as an acceptor. \ensuremath{\delta}-CS also excels in terms of having an exceptionally large negative in-plane Poisson's ratio. Its ferroelasticity with moderate switching barrier is promising for applications in shape memory devices.