Seminarium Fizyki Ciała Stałego
sala 0.06, ul. Pasteura 5
2025-03-07 (10:15) 
dr hab. Maciej Rogala, prof. UL (Wydział Fizyki i Informatyki Stosowanej Uniwersytetu Łódzkiego.)
Two-dimensional crystalline metal oxides – synthesis, modification, and applications of a-MoO3 with a focus on electronics properties
MoO₃ is widely utilized in organic electronics for modifyingtransparent electrodes. Its high work function enables effective energylevel alignment between different layers in OLED and OPV systems. Whilemost studies focus on determining the minimum thickness required for thefunctional properties, this seminar will challenge that approach byemphasizing the crucial role of crystallinity rather than layerthickness in optimizing performance. The presentation will introduce real two-dimensional crystalline MoO₃layers grown on graphene-like substrates [1]. A comprehensive analysisof their morphology, chemical composition, and electronic structure willbe provided by STM, AFM, XPS, UPS, TEM, STS and KPFM techniques.Additionally, the potential for nanoscale modifications will be explored[2], with particular attention given to the challenges associated withmeasuring the work function of ultra-thin functional layers [3]. [1] D.A. Kowalczyk, M. Rogala et al. 2D Mater. 8 025005 (2021) [2] A. Nadolska, M. Rogala et al. Crystals, 13 905 (2023) [3] D.A. Kowalczyk, M. Rogala et al. ACS Appl. Mater. Interfaces, 1444506 (2022) *Work was supported by the National Science Centre, Poland2020/38/E/ST3/00293