Influence of oxygen ion migration from substrates on photochemical degradation of ch3nh3pbi3 hybrid Perovskite
Journal
Energies
Journal Volume
14
Journal Issue
16
Date Issued
2021
Author(s)
Zhidkov I.S
Akbulatov A.F
Inasaridze L.N
Kukharenko A.I
Frolova L.A
Cholakh S.O
Chueh C.-C
Troshin P.A
Kurmaev E.Z.
Abstract
Measurements of XPS survey, core levels (N 1s, O 1s, Pb 4f, I 3d), and valence band (VB) spectra of CH3NH3PbI3 (MAPbI3) hybrid perovskite prepared on different substrates (glass, indium tin oxide (ITO), and TiO2) aged under different light-soaking conditions at room temperature are presented. The results reveal that the photochemical stability of MAPbI3 depends on the type of substrate and gradually decreases when glass is replaced by ITO and TiO2. Also, the degradation upon exposure to visible light is accompanied by the formation of MAI, PbI2, and Pb0 products as shown by XPS core levels spectra. According to XPS O 1s and VB spectra measurements, this degradation process is superimposed on the partial oxidation of lead atoms in ITO/MAPbI3 and TiO2/MAPbI3, for which Pb–O bonds are formed due to the diffusion of the oxygen ions from the substrates. This unexpected interaction leads to additional photochemical degradation. ? 2021 by the author. Licensee MDPI, Basel, Switzerland.
Subjects
Hybrid perovskites
Light-induced degradation
Oxygen ions
Substrates
XPS
Core levels
Indium compounds
ITO glass
Layered semiconductors
Light
Oxygen
Perovskite
Photodegradation
Tin oxides
Titanium dioxide
X ray photoelectron spectroscopy
Degradation process
Different substrates
Influence of oxygen
Partial oxidations
Photochemical degradation
Photochemical stability
Spectra measurements
Valence band spectra
Lead compounds
SDGs
Type
journal article