Stability Studies in Methyl Ammonium Lead Iodide based Perovskite PVs via Solvent Engineering
POSTER
Abstract
Perovskite photovoltaics (PVs) have emerged as a promising technology due to their low cost and exceptional light-harvesting capability. Achieving high performance and stability in perovskite-based devices critically depends on the formation of uniform perovskite films. Among various strategies, anti-solvent engineering plays a significant role in enhancing grain boundaries and, consequently, the film morphology.
In this study, both chlorobenzene (CB) and ethyl acetate (EA) were explored as effective anti-solvents for the formation of three-dimensional MAPbI₃ perovskite films. The choice of anti-solvent directly influences the surface morphology of the resulting material. In our experiments, we systematically investigated the effects of CB and EA using a one-step spin-coating process for film fabrication. We characterized the film's morphology and hydrophobicity via optical imaging and contact angle measurements. Degradation of the lead-based perovskite films was optically observed through changes in coloration, crystal structure transformation, and variations in vibrational spectra upon aging for several days.
A comparative study of the photovoltaic performance of n-i-p structured devices fabricated with CB and EA as anti-solvents was conducted. The EA-treated devices outperformed those prepared with CB, achieving a best device power conversion efficiency (PCE) of 17.92%, compared to 14.04% for the chlorobenzene-based devices.
In this study, both chlorobenzene (CB) and ethyl acetate (EA) were explored as effective anti-solvents for the formation of three-dimensional MAPbI₃ perovskite films. The choice of anti-solvent directly influences the surface morphology of the resulting material. In our experiments, we systematically investigated the effects of CB and EA using a one-step spin-coating process for film fabrication. We characterized the film's morphology and hydrophobicity via optical imaging and contact angle measurements. Degradation of the lead-based perovskite films was optically observed through changes in coloration, crystal structure transformation, and variations in vibrational spectra upon aging for several days.
A comparative study of the photovoltaic performance of n-i-p structured devices fabricated with CB and EA as anti-solvents was conducted. The EA-treated devices outperformed those prepared with CB, achieving a best device power conversion efficiency (PCE) of 17.92%, compared to 14.04% for the chlorobenzene-based devices.
*LUMS - Lahore University of Management Sciences, Pakistan and EPFL - Swiss Federal Technology Institute of Lausanne, Switzerland.
Presenters
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Qurat Ul Ain
- Lahore University of Management Sciences
- LUMS University