Post-treatments for Hybrid Halide Perovskites Absorbers Grown by PLD: Towards High-Performance Solar Cells
Project motivation: Halide perovskites are a breakthrough technology for complementing next-generation tandem solar cells devices. We explore pulse laser deposition (PLD) as an alternative physical vapor deposition (PVD) method to grow complex halide perovskite compositions from a single source PLD target. Demonstrating multi-cation hybrid halide perovskites proof of concept solar cells and stoichiometry control are the first steps toward high-efficiency solar cells absorbers grown by PLD (Ref. T. Soto Montero et al. manuscript in preparation). However, morphology improvements, defect passivation, and optimum interfaces are necessary to deliver efficient proof-of-concept devices with improved stability.
Project goal: Study the influence of different passivation strategies on the surface termination, morphology improvements (grain size, preferential growth orientation) and/or improve humidity resilience. Compare control solar cell devices with post-treated devices and their influence on the parameters of the solar cell (PCE, Voc, Jsc, FF).
Tasks of MSc student: Apply and optimize different post-treatments onto the as-deposited halide perovskite absorber layer grown by PLD, for instance, MACl passivation, IPA surface post-treatment, and/or 2D passivation strategies. Employ X-Ray Photoelectron Spectroscopy (XPS), Photoluminescence (PL), X-Ray Diffraction (XRD), and Atomic force microscopy (AFM) to study the surface and bulk modifications on the halide perovskite absorber. Prepare proof of concept solar cell devices with control and post-treated perovskite absorbers
Contact:
Tatiana Soto Montero (daily supervisor), t.d.s.sotomontero@utwente.nl
Monica Morales-Masis (supervisor), CR 3237, m.moralesmasis@utwente.nl , +31534891791
https://www.utwente.nl/en/tnw/ims/research/research-morales/