IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films
The advantages of IR spectroscopy include relatively fast analysis and sensitivity, which facilitate its wide application in the pharmaceutical, chemical and polymer sectors. Thus, IR spectroscopy provides an excellent opportunity to monitor the degradation and concomitant evolution of the molecular...
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/3/1288 |
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| author | Darkhan Yerezhep Zhansaya Omarova Abdurakhman Aldiyarov Ainura Shinbayeva Nurlan Tokmoldin |
| author_facet | Darkhan Yerezhep Zhansaya Omarova Abdurakhman Aldiyarov Ainura Shinbayeva Nurlan Tokmoldin |
| author_sort | Darkhan Yerezhep |
| collection | DOAJ |
| description | The advantages of IR spectroscopy include relatively fast analysis and sensitivity, which facilitate its wide application in the pharmaceutical, chemical and polymer sectors. Thus, IR spectroscopy provides an excellent opportunity to monitor the degradation and concomitant evolution of the molecular structure within a perovskite layer. As is well-known, one of the main limitations preventing the industrialization of perovskite solar cells is the relatively low resistance to various degradation factors. The aim of this work was to study the degradation of the surface of a perovskite thin film CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3-x</sub>Cl<sub>x</sub> caused by atmosphere and light. To study the surface of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3-x</sub>Cl<sub>x</sub>, a scanning electron microscope, infrared (IR) spectroscopy and optical absorption were used. It is shown that the degradation of the functional layer of perovskite proceeds differently depending on the acting factor present in the surrounding atmosphere, whilst the chemical bonds are maintained within the perovskite crystal structure under nitrogen. However, when exposed to an ambient atmosphere, an expansion of the NH<sub>3</sub><sup>+</sup> band is observed, which is accompanied by a shift in the N–H stretching mode toward higher frequencies; this can be explained by the degradation of the perovskite surface due to hydration. This paper shows that the dissociation of H<sub>2</sub>O molecules under the influence of sunlight can adversely affect the efficiency and stability of the absorbing layer. This work presents an approach to the study of perovskite structural stability with the aim of developing alternative concepts to the fabrication of stable and sustainable perovskite solar cells. |
| first_indexed | 2024-03-11T09:33:36Z |
| format | Article |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T09:33:36Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-aa443242e2634751a758f52749fecac52023-11-16T17:30:20ZengMDPI AGMolecules1420-30492023-01-01283128810.3390/molecules28031288IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite FilmsDarkhan Yerezhep0Zhansaya Omarova1Abdurakhman Aldiyarov2Ainura Shinbayeva3Nurlan Tokmoldin4Faculty of Physics and Technology, Al Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty 050040, KazakhstanFaculty of Physics and Technology, Al Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty 050040, KazakhstanFaculty of Physics and Technology, Al Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty 050040, KazakhstanFaculty of Physics and Technology, Al Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty 050040, KazakhstanOptoelectronics of Disordered Semiconductors, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, GermanyThe advantages of IR spectroscopy include relatively fast analysis and sensitivity, which facilitate its wide application in the pharmaceutical, chemical and polymer sectors. Thus, IR spectroscopy provides an excellent opportunity to monitor the degradation and concomitant evolution of the molecular structure within a perovskite layer. As is well-known, one of the main limitations preventing the industrialization of perovskite solar cells is the relatively low resistance to various degradation factors. The aim of this work was to study the degradation of the surface of a perovskite thin film CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3-x</sub>Cl<sub>x</sub> caused by atmosphere and light. To study the surface of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3-x</sub>Cl<sub>x</sub>, a scanning electron microscope, infrared (IR) spectroscopy and optical absorption were used. It is shown that the degradation of the functional layer of perovskite proceeds differently depending on the acting factor present in the surrounding atmosphere, whilst the chemical bonds are maintained within the perovskite crystal structure under nitrogen. However, when exposed to an ambient atmosphere, an expansion of the NH<sub>3</sub><sup>+</sup> band is observed, which is accompanied by a shift in the N–H stretching mode toward higher frequencies; this can be explained by the degradation of the perovskite surface due to hydration. This paper shows that the dissociation of H<sub>2</sub>O molecules under the influence of sunlight can adversely affect the efficiency and stability of the absorbing layer. This work presents an approach to the study of perovskite structural stability with the aim of developing alternative concepts to the fabrication of stable and sustainable perovskite solar cells.https://www.mdpi.com/1420-3049/28/3/1288PSCdegradationFTIR spectroscopyfunctional layerstability |
| spellingShingle | Darkhan Yerezhep Zhansaya Omarova Abdurakhman Aldiyarov Ainura Shinbayeva Nurlan Tokmoldin IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films Molecules PSC degradation FTIR spectroscopy functional layer stability |
| title | IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films |
| title_full | IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films |
| title_fullStr | IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films |
| title_full_unstemmed | IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films |
| title_short | IR Spectroscopic Degradation Study of Thin Organometal Halide Perovskite Films |
| title_sort | ir spectroscopic degradation study of thin organometal halide perovskite films |
| topic | PSC degradation FTIR spectroscopy functional layer stability |
| url | https://www.mdpi.com/1420-3049/28/3/1288 |
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