Yongtao Liu is a third-year Ph.D. student in the Department of Materials Science and Engineering at the University of Tennessee, Knoxville. Mr. Liu received his Bachelor of Science in the College of Chemistry from Nankai University, Tianjin, China, in 2014. His current research focuses on clarifying how local structural-chemical interaction alters hybrid organic-inorganic perovskites (HOIPs) physics, revealing the ferroic nature of HOIPs, and how local properties affect the photovoltaic performance of HOIPs. Mr. Liu employs multiple techniques to study the microstructure and microchemistry of HOIPs, including scanning probe microscopy, secondary ion mass spectrometry, and nanoscale infrared spectroscopy. Mr. Liu’s research interests include interface direct assembly, nanoscale imaging of functional properties, chemical imaging methods, and image processing with machine learning. Mr. Liu’s recent publications as a co-author and first author focus on CH3NH3PbI3perovskite materials.