Photoreflectance and Photoluminescence Study of Antimony Selenide Crystals.

Among inorganic, Earth-abundant, and low-toxicity photovoltaic technologies, SbSe has emerged as a strong material contender reaching over 10% solar cell power conversion efficiency. Nevertheless, the bottleneck of this technology is the high deficit of open-circuit voltage ( ) as seen in many other emerging chalcogenide technologies. Commonly, the loss of is related to the nonradiative carrier recombination through defects, but other material characteristics can also limit the achievable .

The effect of elevated temperatures on excitonic emission and degradation processes of WS monolayers.

Controlled heating experiments in an inert environment have been performed on WS2 monolayers, in order to clarify the conflicting reports on the high-temperature photoluminescent response of 2D TMDs. We find that in contrast to some previous results on both WS2 and MoS2, the photoluminescent intensity shows a consistent reduction above room temperature. This is accompanied by an almost linear redshift of the peak maximum, and a nearly linear increase in the peak width, which is attributed to an enhanced interaction with optical phonons.

Growth and Characterization of CuZnFeSnS Thin Films for Photovoltaic Applications.

Photovoltaics is a promising technology to produce sustainable energy, thanks to the high amount of energy emitted by the sun. One way of having solar cells with low production costs is to apply thin-film technology and with earth-abundant raw materials. A keen interest is arising in kesterite compounds, which are chalcogenides composed of abundant and non-toxic elements.