Thickness dependence of solar cell efficiency in transition metal dichalcogenides MX2 (M: Mo, W; X: S, Se, Te)

Burak Ozdemir, Veronica Barone

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Bulk transition metal dichalcogenides are indirect gap semiconductors with optical gaps in the range of 0.7–1.6 eV, which makes them suitable for solar cell applications. In this work, we study the electronic structure, optical properties, and the thickness dependence of the solar cell efficiencies of MX2 (M: Mo, W; X: S, Se, Te) with density functional theory and GW + BSE. Through this analysis, we find a change in solar cell efficiency trends at slab thicknesses of 3 μm. For thin films solar cells (thicknesses smaller than 3 μm), the tellurides present the highest efficiencies (about 20% for a 100 nm thick slab). In contrast, for thicknesses greater than 3 μm, our results indicate that a maximum solar cell efficiency can be achieved in WS2. For instance, a 100 μm slab of WS2 presents a solar cell efficiency of 36.3%, making this material a promising candidate for solar cell applications.

Original languageEnglish
Article number110557
JournalSolar Energy Materials and Solar Cells
Volume212
DOIs
StatePublished - Aug 1 2020

Keywords

  • DFT
  • First-principles
  • GW+BSE
  • Solar cell
  • Thin film
  • Transition metal dichalcogenides

Fingerprint

Dive into the research topics of 'Thickness dependence of solar cell efficiency in transition metal dichalcogenides MX2 (M: Mo, W; X: S, Se, Te)'. Together they form a unique fingerprint.

Cite this