South African scientists have proposed a brand new chalcogenide perovskite photo voltaic cell design primarily based on a compound referred to as barium zirconium sulfide. They examined totally different gap transport supplies within the new gadget and located {that a} polymer referred to as P3HT achieved the very best efficiency.
A workforce of scientists led by the University of Fort Hare in South Africa has designed a perovskite photo voltaic cell with an absorber product of a chalcogenide perovskite materials referred to as barium zirconium sulfide (BaZrS).3).
Metal chalcogenide perovskites, with their unhazardous elemental composition, are recognized to supply higher thermal and aqueous stability than organic-inorganic halide perovskites. This signifies that it could be extra appropriate than different supplies within the perovskite household to handle the 2 largest points in business photo voltaic cell manufacturing: low thermal stability and toxicity. In addition, chalcogenide has a wonderful band hole of 1.40 eV which is especially appropriate for single-junction photovoltaic functions.
BaZrS3 is a non-toxic, ample, inorganic chalcogenide perovskite materials that has attracted the eye of the scientific PV group in recent times, as a result of it crystallizes in a perovskite construction, whereas additionally exhibiting very sturdy gentle absorption and good cost transport. In addition, it comprises naturally occurring and non-hazardous components which have a singular focus within the earth’s crust.
on paper”A numerical simulation and evaluation of the chalcogenide BaZrS3-based perovskite photo voltaic cells utilizing totally different gap transport supplies,” printed in Physics Resultsthe analysis workforce defined that it used the SCAPS-1D photo voltaic cell capability software program, developed on the University of Ghent, to simulate the novel cell configuration.
The cell is designed with a substrate product of tin oxide (FTO), an electron transport layer primarily based on tungsten disulfide (WS2)the BaZrS3 absorber, and a gold (Au) metallic contact. For the opening transport materials (HTL), a number of supplies have been examined, particularly polymer Regioregular poly(3-hexylthiophene) (P3HT)copper(I) oxide (Cu2O), and copper thiocyanate (CuSCN).
Through a collection of simulations carried out below customary gentle situations, the researchers discovered that the very best efficiency was obtained within the cell with P3HT HTL. It achieves an influence conversion effectivity of 13.86%, an open-circuit voltage of 6.58 V, a short-circuit present density of 17.59 mA cm-2, and a fill issue of 11.97%. For comparability, Cu2The O cell and the CuSCN gadget achieved efficiencies of 13.70% and 13.80%, respectively.
“On the opposite hand, gadgets with inorganic HTL (CuSCN and Cu2O) extra thermally steady (steady as much as 400 Ok) than gadgets with P3HT as HTL, that are solely steady as much as 320 Ok,” added the scientists. “Finally, comparatively low-cost metals comparable to (platinum) Pt, nickel (Ni), and palladium (Pd) present the identical efficiency in all photo voltaic cell fashions as gold and thus can be utilized as potential alternate options.”
The group additionally ensured {that a} reference cell primarily based on an HTL product of Spiro-OMeTAD achieved an influence conversion effectivity of 16.70%, an open circuit voltage of 1.08 V, a density of short-circuit present of 16.80 mA cm.-2and a fill issue of 88.60%.
“It is predicted that this work will shed extra gentle on the applying of BaZrS3 as a promising absorber materials within the precise manufacturing of photo voltaic cells for clear power manufacturing,” the lecturers concluded.
The first try and develop BaZrS3 for PV functions started in 2020, when a US analysis group developed a skinny movie that was investigated to find out its optical and electrical properties.
This content material is protected by copyright and might not be reused. If you wish to cooperate with us and wish to reuse a few of our content material, please contact: editors@pv-magazine.com.