Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials
High-resolution TEM (HRTEM) is a powerful tool for structure characterization. However, methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite is highly sensitive to electron beams and easily decomposes into lead iodide (PbI<sub>2</sub>). Misidentifications, such as PbI<...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Condensed Matter |
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| Online Access: | https://www.mdpi.com/2410-3896/6/1/1 |
| _version_ | 1828416166062718976 |
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| author | Yu-Hao Deng |
| author_facet | Yu-Hao Deng |
| author_sort | Yu-Hao Deng |
| collection | DOAJ |
| description | High-resolution TEM (HRTEM) is a powerful tool for structure characterization. However, methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite is highly sensitive to electron beams and easily decomposes into lead iodide (PbI<sub>2</sub>). Misidentifications, such as PbI<sub>2</sub> being incorrectly labeled as perovskite, are widely present in HRTEM characterization and would negatively affect the development of perovskite research field. Here misidentifications in MAPbI<sub>3</sub> perovskite are summarized, classified, and corrected based on low-dose imaging and electron diffraction (ED) simulations. Corresponding crystallographic parameters of intrinsic tetragonal MAPbI<sub>3</sub> and the confusable hexagonal PbI<sub>2</sub> are presented unambiguously. Finally, the method of proper phase identification and some strategies to control the radiation damage in HRTEM are provided. This warning paves the way to avoid future misinterpretations in HRTEM characterization of perovskite and other electron beam-sensitive materials. |
| first_indexed | 2024-12-10T13:59:39Z |
| format | Article |
| id | doaj.art-9110a31c1bc24613bbe24b3cbc2dbee2 |
| institution | Directory Open Access Journal |
| issn | 2410-3896 |
| language | English |
| last_indexed | 2024-12-10T13:59:39Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Condensed Matter |
| spelling | doaj.art-9110a31c1bc24613bbe24b3cbc2dbee22022-12-22T01:45:50ZengMDPI AGCondensed Matter2410-38962020-12-0161110.3390/condmat6010001Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite MaterialsYu-Hao Deng0Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, ChinaHigh-resolution TEM (HRTEM) is a powerful tool for structure characterization. However, methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite is highly sensitive to electron beams and easily decomposes into lead iodide (PbI<sub>2</sub>). Misidentifications, such as PbI<sub>2</sub> being incorrectly labeled as perovskite, are widely present in HRTEM characterization and would negatively affect the development of perovskite research field. Here misidentifications in MAPbI<sub>3</sub> perovskite are summarized, classified, and corrected based on low-dose imaging and electron diffraction (ED) simulations. Corresponding crystallographic parameters of intrinsic tetragonal MAPbI<sub>3</sub> and the confusable hexagonal PbI<sub>2</sub> are presented unambiguously. Finally, the method of proper phase identification and some strategies to control the radiation damage in HRTEM are provided. This warning paves the way to avoid future misinterpretations in HRTEM characterization of perovskite and other electron beam-sensitive materials.https://www.mdpi.com/2410-3896/6/1/1MAPbI<sub>3</sub> perovskitetransmission electron microscopy (TEM)electron diffraction (ED)phase identificationelectron beam-sensitive |
| spellingShingle | Yu-Hao Deng Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials Condensed Matter MAPbI<sub>3</sub> perovskite transmission electron microscopy (TEM) electron diffraction (ED) phase identification electron beam-sensitive |
| title | Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials |
| title_full | Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials |
| title_fullStr | Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials |
| title_full_unstemmed | Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials |
| title_short | Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials |
| title_sort | common phase and structure misidentifications in high resolution tem characterization of perovskite materials |
| topic | MAPbI<sub>3</sub> perovskite transmission electron microscopy (TEM) electron diffraction (ED) phase identification electron beam-sensitive |
| url | https://www.mdpi.com/2410-3896/6/1/1 |
| work_keys_str_mv | AT yuhaodeng commonphaseandstructuremisidentificationsinhighresolutiontemcharacterizationofperovskitematerials |