Prof. Yung-kuan Tseng

National Yunlin University of Science and Technology
Taiwan

Abstract Title: Research on Microstructural and Compositional Changes in Degraded Perovskite Solar Cells

Biography:

Yung-Kuan Tseng is a professor in the Department of Cultural Heritage Conservation at National Yunlin University of Science and Technology in Taiwan, and also holds a joint appointment at the Graduate School of Materials Science. His recent research primarily focuses on protective materials for outdoor geo-material cultural heritage, nanostructured materials, and sustainable energy materials.

Research Interest:

This study aims to thoroughly investigate the microstructural and compositional changes of degraded perovskite solar cells after accelerated aging, with the goal of elucidating the underlying mechanisms of performance degradation. The research will involve fabricating standard perovskite solar cells and subjecting them to various accelerated aging experiments. IV curve measurements will be conducted at different aging time points to assess the extent of performance degradation. Subsequently, multiple analytical techniques will be employed to observe and analyze the degraded cells: Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) will be used to observe film morphology, grain changes, cracks, and interfacial defects; X-ray Diffraction (XRD) will analyze crystal structure and phase composition changes. For compositional and chemical changes, Energy Dispersive X-ray Spectroscopy (EDS) will provide elemental distribution information, X-ray Photoelectron Spectroscopy (XPS) and Fourier Transform Infrared Spectroscopy (FTIR) will analyze elemental and organic component changes, while a Raman spectrometer will be used to detect lattice vibrational modes and defect information. Through these comprehensive microstructural and compositional analyses, this study aims to precisely identify the defect types, formation mechanisms, and material chemical transformations leading to the performance decline of perovskite solar cells, thereby providing a solid experimental basis and scientific insights for the future development of more stable, long-lifetime perovskite solar cells.