Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018)
    Thin Films Tuesday Sessions
       Session TF-TuM

Paper TF-TuM10
Surface Reactions of Metal and Metal Oxides on Hybrid Perovskite Materials for Optoelectronics Applications

Tuesday, December 4, 2018, 11:00 am, Room Naupaka Salons 4

Session: Innovations in the Development of Multifunctional Thin Films
Presenter: Francisco Aguirre-Tostado, CIMAV-Monterrey, Mexico
Authors: J. Cazares-Montañez, CIMAV-Monterrey, Mexico
M.A. Martínez-Puente, CIMAV-Monterrey, Mexico
R. Garza-Hernández, CIMAV-Monterrey, Mexico
E. Martínez-Guerra, CIMAV-Monterrey, Mexico
M. Quevedo-Lopez, University of Texas at Dallas
F.S. Aguirre-Tostado, CIMAV-Monterrey, Mexico
Correspondent: Click to Email
Hybrid perovskites (HPV) have recently emerged as highly efficient optoelectronic materials and are currently being intensively investigated as alternative active layer materials for photodetectors, light-emitting diodes, laser devices, sensors and X-ray detectors, among others. Since HPV are direct band gap materials with high optical absorption coefficients (~ 105cm-1) the majority of publications have been dedicated to hybrid organic-inorganic solar cells with certified efficiencies over 20%. However the realization of a long-lasting device implies the understanding of chemical and structural stability of HPV materials and their interface with electron and hole transport layers (ETL and HTL, respectively). This presentation will show detailed XPS analyses of the the chemical stability of the transition metal and transition metal oxides with ABX3 hybrid perovskites for A=MethylAmmonium (MA), B=Pb, and X=Cl, I, and Br. HTL/HPV interface is not trivial as the reactivity of halogen group elements forms an unstable high resistance interlayer at the charge transport layer interface compromising the optimum operation of the device. The electrical characterization and work function measurements will be discussed and correlated to the chemistry and cristallyne structure of the materials of interest.