Proceedings of Asia-Pacific Conference on Perovskite, Organic Photovoltaics&Optoelectronics (IPEROP25)
Publication date: 17th October 2024
Nanocrystals and nanoplatelets of cesium lead halide perovskites (CsPbX₃, X = Cl, Br, Cl) have been extensively studied for their exceptional optoelectronic properties[1]. However, achieving large-area thin films suitable for practical applications remains a significant challenge. While RF magnetron sputtering produces high-quality films with minimal roughness and excellent uniformity, the method necessitates complex vacuum systems and stringent deposition control[2].
Here, we demonstrate a blade coating technique utilizing mecho-synthesized[3] CsPbX₃ powders combined with polymer additives for scalable thin-film deposition. The precursor solution is prepared by dissolving the synthesized powders in ethanol, incorporating polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) as rheological modifiers. These additives optimize the solution's viscosity and enable uniform film formation[4].
The inclusion of polymeric additives allows for the fabrication of thicker films, crucial for efficient alpha particle absorption, while maintaining the film quality and uniformity necessary for high-performance alphavoltaic devices. This blade coating method offers a cost-effective and scalable approach to producing high-quality cesium lead halide perovskite films under ambient conditions, addressing key limitations in existing fabrication techniques.
I would like to express my gratitude to my faculty mentors, Nicholas Rolston and graduate mentor Vineeth Penukula, for their invaluable guidance throughout this project. I would like acknowledge Intel for funding Fulton Undergraduate Research intiative grant.I am also thankful to all the members othe Rolston lab for their assistance and support. Additionally, I acknowledge the Eyring Materials Center for providing access to essential resources, supported in part by NNCI-EECS-1542160.
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