Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br)
We present a Raman study on the phase transitions of organic/inorganic hybrid perovskite materials, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br), which are used as solar cells with high power conversion efficiency. The temperature dependence of the Rama...
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MDPI AG
2019-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/24/3/626 |
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| author | Kousuke Nakada Yuki Matsumoto Yukihiro Shimoi Koji Yamada Yukio Furukawa |
| author_facet | Kousuke Nakada Yuki Matsumoto Yukihiro Shimoi Koji Yamada Yukio Furukawa |
| author_sort | Kousuke Nakada |
| collection | DOAJ |
| description | We present a Raman study on the phase transitions of organic/inorganic hybrid perovskite materials, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br), which are used as solar cells with high power conversion efficiency. The temperature dependence of the Raman bands of CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) was measured in the temperature ranges of 290 to 100 K for CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> and 340 to 110 K for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>. Broad ν<sub>1</sub> bands at ~326 cm<sup>−1</sup> for MAPbBr<sub>3</sub> and at ~240 cm<sup>−1</sup> for MAPbI<sub>3</sub> were assigned to the MA⁻PbX<sub>3</sub> cage vibrations. These bands exhibited anomalous temperature dependence, which was attributable to motional narrowing originating from fast changes between the orientational states of CH<sub>3</sub>NH<sub>3</sub><sup>+</sup> in the cage. Phase transitions were characterized by changes in the bandwidths and peak positions of the MA⁻cage vibration and some bands associated with the NH<sub>3</sub><sup>+</sup> group. |
| first_indexed | 2024-12-10T07:28:06Z |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-10T07:28:06Z |
| publishDate | 2019-02-01 |
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| spelling | doaj.art-1318dd18b21a45d984d880b1aa5340c42022-12-22T01:57:38ZengMDPI AGMolecules1420-30492019-02-0124362610.3390/molecules24030626molecules24030626Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br)Kousuke Nakada0Yuki Matsumoto1Yukihiro Shimoi2Koji Yamada3Yukio Furukawa4Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, JapanResearch Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, JapanResearch Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, JapanCollege of Industrial Technology, Nihon University, Izumi-cho 1-2-1, Narashino, Chiba 27-8575, JapanDepartment of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, JapanWe present a Raman study on the phase transitions of organic/inorganic hybrid perovskite materials, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br), which are used as solar cells with high power conversion efficiency. The temperature dependence of the Raman bands of CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) was measured in the temperature ranges of 290 to 100 K for CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> and 340 to 110 K for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>. Broad ν<sub>1</sub> bands at ~326 cm<sup>−1</sup> for MAPbBr<sub>3</sub> and at ~240 cm<sup>−1</sup> for MAPbI<sub>3</sub> were assigned to the MA⁻PbX<sub>3</sub> cage vibrations. These bands exhibited anomalous temperature dependence, which was attributable to motional narrowing originating from fast changes between the orientational states of CH<sub>3</sub>NH<sub>3</sub><sup>+</sup> in the cage. Phase transitions were characterized by changes in the bandwidths and peak positions of the MA⁻cage vibration and some bands associated with the NH<sub>3</sub><sup>+</sup> group.https://www.mdpi.com/1420-3049/24/3/626Raman spectroscopyphase transitionmotional narrowingbandwidthorganic/inorganic hybrid perovskitesmethylammonium lead halide perovskites |
| spellingShingle | Kousuke Nakada Yuki Matsumoto Yukihiro Shimoi Koji Yamada Yukio Furukawa Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) Molecules Raman spectroscopy phase transition motional narrowing bandwidth organic/inorganic hybrid perovskites methylammonium lead halide perovskites |
| title | Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) |
| title_full | Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) |
| title_fullStr | Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) |
| title_full_unstemmed | Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) |
| title_short | Temperature-Dependent Evolution of Raman Spectra of Methylammonium Lead Halide Perovskites, CH<sub>3</sub>NH<sub>3</sub>PbX<sub>3</sub> (X = I, Br) |
| title_sort | temperature dependent evolution of raman spectra of methylammonium lead halide perovskites ch sub 3 sub nh sub 3 sub pbx sub 3 sub x i br |
| topic | Raman spectroscopy phase transition motional narrowing bandwidth organic/inorganic hybrid perovskites methylammonium lead halide perovskites |
| url | https://www.mdpi.com/1420-3049/24/3/626 |
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