Special Seminar
Name: Dr. Badri Vishal
Affiliation: Postdoctoral researcher, KPV-LAB, KAUST solar center, KAUST, KSA
Title: Advanced transmission electron microscopy (TEM) for beam-sensitive materials (perovskite, C60, GNWs) in Solar cell application
Date & Time: Friday, 05th April at 4.00 p.m.
Venue: Rajarshi Bhattacharya Memorial Lecture Hall, Chemical Sciences Building
Abstract:
Transmission electron microscopy (TEM) stands as an indispensable tool for unraveling the intricate nanostructural characteristics of materials; however, it becomes challenging for super beam-sensitive soft materials such as organic mixed halide perovskites, molecularly crystalline C60, and graphene nanowalls (GNWs). Perovskite solar cells have emerged as promising technology for renewable energy generation due to their high efficiency and low-cost fabrication. Perovskites (3D, 2D (n = 1, 2, ..∞)) and C60 are supercritical components for perovskite solar cells (Single/Tandem/triple/quadruple Jn). Despite their promising optoelectronic properties, these materials are immensely prone to electron beam-induced damage, necessitating sophisticated methodologies to preserve their structural integrity during TEM (and FIB) based experiments. These challenges, leveraging advanced techniques like low-dose imaging along with HR-S/TEM, iDPC, EELS, EDS, can unveil critical insights. This work will present the limitations, technical challenges, and how to overcome or mitigate these challenges, which majorly depend on each material and technique/methodology. This interdisciplinary approach fosters advancements by overcoming technical challenges and unraveling fundamental insights essential for enhancing device performance and stability, thereby fostering their integration into the renewable energy fabric.
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