Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Enhancing Performance of Nanocrystalline SnO2 by Photonic Curing Using Impedance Spectroscopy Analysis

Version 1 : Received: 21 August 2024 / Approved: 22 August 2024 / Online: 24 August 2024 (10:47:17 CEST)

How to cite: Slimani, M. A.; Cloutier, S. G.; Izquierdo, R. Enhancing Performance of Nanocrystalline SnO2 by Photonic Curing Using Impedance Spectroscopy Analysis. Preprints 2024, 2024081686. https://doi.org/10.20944/preprints202408.1686.v1 Slimani, M. A.; Cloutier, S. G.; Izquierdo, R. Enhancing Performance of Nanocrystalline SnO2 by Photonic Curing Using Impedance Spectroscopy Analysis. Preprints 2024, 2024081686. https://doi.org/10.20944/preprints202408.1686.v1

Abstract

Wide-bandgap tin oxide (SnO2) thin-films are frequently used as an electron-transporting layers in perovskite solar cells due to superior thermal and environmental stabilities. However, its crystallization by conventional thermal methods requires typical temperatures between 300 and 900 ◦C [1] with up-to 60 min crystallization times. These post-processing conditions severely limit the choice of substrates and reduce the large-scale manufacturing capabilities. This work describes the intense pulsed light-induced crystallization of SnO2 thin films using only 500 μs of exposure time. Thin-film properties are investigated using both impedance spectroscopy and photoconductivity characteristic measurements. Nyquist plot analysis establishes that the process parameters have a significant impact on the electronic and ionic behaviors of the SnO2 films. Most importantly, we demonstrate that light-induced crystallization yields improved topography and excellent electrical properties through enhanced charge transfer, improved interfacial morphology and better ohmic contacts compared to thermally-annealed SnO2 films.

Keywords

Impedance spectroscopie; Photonic curing; SnO2; Dark injection current transient; Photo-Celiv

Subject

Chemistry and Materials Science, Materials Science and Technology

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