Graduate Thesis Or Dissertation


Formation of Cu₂ZnSnS₄ Thin Films via Reactive Sintering of Binary Metal-Sulfide Nanoparticles Using Intense Pulsed Light Public Deposited

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  • Copper zinc tin sulfide (CZTS) is a potential solar material for thin film solar cells according to its suitable band gap in the visible light range, high absorption coefficient, low toxicity, good photostability and relative earth abundance of component elements. However, the production cost of this solar thin film material is dominated by the vacuum-based thin film deposition techniques and the production throughput is limited by the long-term heating processes. In order to improve the process a high output and short-term process, solution-based thin film deposition methods such as spin coating and inkjet printing have been studied to build the thin film while serval sintering methods including intense pulsed light (IPL) sintering, UV curing, and xenon sintering have been studied to replace the more traditional thermal sintering process. Different measurements including X-ray diffraction, Raman spectroscopy, scanning electron microscope, transmission electron microscopy and Hall effect measurement have been used to characterize the structures and properties of the IPL sintered materials. The formation of CZTS film can be accomplished within a few minutes, which is nearly 60 times faster than the traditional thermal process. Furthermore, methylene blue photodegradation experiments were carried out to confirm the photocatalytic properties of IPL sintered CZTS films.
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