Influence of Oxygen Ion Migration from Substrates on Photochemical Degradation of CH 3 NH 3 PbI 3 Hybrid Perovskite

Ivan S. Zhidkov, Azat F. Akbulatov, Liana N. Inasaridze, Andrey I. Kukharenko, Lyubov A. Frolova, Seif O. Cholakh, Chu-Chen Chueh, Pavel A. Troshin and Ernst Z. Kurmaev
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Ivan S. Zhidkov: Institute of Physics and Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia
Azat F. Akbulatov: Institute for Problems of Chemical Physics, The Russian Academy of Sciences (IPCP RAS), Semenov Prospect 1, 141432 Chernogolovka, Russia
Liana N. Inasaridze: Institute for Problems of Chemical Physics, The Russian Academy of Sciences (IPCP RAS), Semenov Prospect 1, 141432 Chernogolovka, Russia
Andrey I. Kukharenko: Institute of Physics and Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia
Lyubov A. Frolova: Institute for Problems of Chemical Physics, The Russian Academy of Sciences (IPCP RAS), Semenov Prospect 1, 141432 Chernogolovka, Russia
Seif O. Cholakh: Institute of Physics and Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia
Chu-Chen Chueh: Advanced Research Center for Green Materials Science and Technology, Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Pavel A. Troshin: Institute for Problems of Chemical Physics, The Russian Academy of Sciences (IPCP RAS), Semenov Prospect 1, 141432 Chernogolovka, Russia
Ernst Z. Kurmaev: Institute of Physics and Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia

Energies, 2021, vol. 14, issue 16, 1-9

Abstract: Measurements of XPS survey, core levels (N 1s, O 1s, Pb 4f, I 3d), and valence band (VB) spectra of CH 3 NH 3 PbI 3 (MAPbI 3 ) hybrid perovskite prepared on different substrates (glass, indium tin oxide (ITO), and TiO 2 ) aged under different light-soaking conditions at room temperature are presented. The results reveal that the photochemical stability of MAPbI 3 depends on the type of substrate and gradually decreases when glass is replaced by ITO and TiO 2 . Also, the degradation upon exposure to visible light is accompanied by the formation of MAI, PbI 2 , and Pb 0 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/MAPbI 3 and TiO 2 /MAPbI 3 , 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.

Keywords: hybrid perovskites; XPS; light-induced degradation; oxygen ions; substrates (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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