Accession Number : AD1010020


Title :   Electroabsorption Spectroscopy Measurements of the Exciton Binding Energy, ElectronHole Reduced Effective Mass, and Band Gap in the Perovskite CHsub3NHsub3PbIsub3


Descriptive Note : Journal Article


Corporate Author : University of Washington Seattle United States


Personal Author(s) : Ziffer,Mark E ; Mohammed,Joseph C ; Ginger,David S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1010020.pdf


Report Date : 28 Jul 2016


Pagination or Media Count : 9


Abstract : We use electroabsorption (EA) spectroscopy to measure the exciton binding energy (EsubB), electronhole reduced effective mass (), and one-electron band gap (Eg) at the fundamental absorption edge of the hybrid organicinorganic perovskite CHsub3NHsub3PbIsub3 in its tetragonal phase at 300 K. By studying the second-harmonic EA spectra at the fundamental absorption edge we establish that the room temperature EA response in CHsub3NHsub3PbIsub3 follows the low-field FranzKeldyshAspnes (FKA) effect. Following FKA analysis we find that = 0.12 0.03msub0, EsubB = 7.4 meV, and Esubg = 1.633 eV. Our results provide direct experimental evidence that at room temperature primary transitions occurring in CHsub3NHsub3PbIsub3 can essentially be described in terms of free carrier generation.


Descriptors :   band gaps , Perovskites , spectroscopy , Solar cells , Photovoltaic effect , Excitons , Stark effect , Ionization , spectra , semiconductors , band structures , Low temperature , scattering , optical phenomena , electrooptics , optical properties


Distribution Statement : APPROVED FOR PUBLIC RELEASE