Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.354
Publication date: 16th December 2024
The quest for low cost, non-toxic and Earth abundant materials solutions for thin film PV, has sparked significant interest in new inorganic semiconductors with complex compositions. One of the challenges with material discovery and new material compositions, is their fabrication in thin film form. Challenges such as volatility or solvent incompatibility, hinders progress in either high quality material demonstration or functionality via device integration.
To overcome these barriers, we employ mechanochemical synthesis to identify promising halide and chalco-halide powders as candidate materials. These powders serve as targets for thin-film deposition via pulsed laser deposition (PLD), a technique that uniquely enables near-stoichiometric transfer of complex compositions, regardless of elemental volatility. This capability facilitates the fabrication of high-quality thin films for proof-of-concept solar cells, with critical PLD parameters optimized to tailor the properties of complex halide, chalco-halide, and chalcogenide semiconductors.
The versatility of PLD is further leveraged for material discovery through compositional gradient screening on substrates, enabling rapid evaluation via photoluminescence and compositional mapping. The resulting materials, selected based on their band gaps, are explored as photo-absorbers or contact layers, advancing their integration into thin-film solar cell devices. This presentation will highlight strategies for experimental material discovery, thin-film synthesis, and device integration, contributing to the development of the next generation of optoelectronic materials and devices.
References:
https://pubs.acs.org/doi/10.1021/acsenergylett.4c01466
https://doi.org/10.1002/adfm.202316144
https://doi.org/10.1021/acs.chemmater.1c02054
https://doi.org/10.1021/acs.chemmater.3c01349
https://doi.org/10.1016/j.matt.2023.10.003
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