Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors
Strong terahertz (THz) emission from the methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite semiconductors has been observed following above-bandgap photoexcitation, yet local THz responses of crystalline microstructures are absent. We implement laser THz emission microscope (LTEM...
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MDPI AG
2022-10-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/10/1462 |
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| author | Zhaoyu Liu Liang Luo Joongmok Park Richard H. J. Kim Zhaoning Song Deniz Turan Mona Jarrahi Yanfa Yan Jigang Wang |
| author_facet | Zhaoyu Liu Liang Luo Joongmok Park Richard H. J. Kim Zhaoning Song Deniz Turan Mona Jarrahi Yanfa Yan Jigang Wang |
| author_sort | Zhaoyu Liu |
| collection | DOAJ |
| description | Strong terahertz (THz) emission from the methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite semiconductors has been observed following above-bandgap photoexcitation, yet local THz responses of crystalline microstructures are absent. We implement laser THz emission microscope (LTEM), yet-to-be applied to the perovskite semiconductors, as a novel and complementary tool to evaluate the electronic and grain heterogeneity of MAPbI<sub>3</sub> thin films. Two MAPbI<sub>3</sub> samples with different grain sizes are studied. Using this approach, we show that the one with a larger grain size gives more uniform THz radiation. More significant spatial THz intensity fluctuation is observed for the sample with a smaller grain size. |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T20:24:22Z |
| publishDate | 2022-10-01 |
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| record_format | Article |
| series | Crystals |
| spelling | doaj.art-83898687bc034548a52f230f04ddb83f2023-11-23T23:38:51ZengMDPI AGCrystals2073-43522022-10-011210146210.3390/cryst12101462Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite SemiconductorsZhaoyu Liu0Liang Luo1Joongmok Park2Richard H. J. Kim3Zhaoning Song4Deniz Turan5Mona Jarrahi6Yanfa Yan7Jigang Wang8Ames National Laboratory-USDOE, Ames, IA 50011, USAAmes National Laboratory-USDOE, Ames, IA 50011, USAAmes National Laboratory-USDOE, Ames, IA 50011, USAAmes National Laboratory-USDOE, Ames, IA 50011, USADepartment of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH 43606, USAElectrical and Computer Engineering, University of California–Los Angeles, Los Angeles, CA 90095, USAElectrical and Computer Engineering, University of California–Los Angeles, Los Angeles, CA 90095, USADepartment of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH 43606, USAAmes National Laboratory-USDOE, Ames, IA 50011, USAStrong terahertz (THz) emission from the methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite semiconductors has been observed following above-bandgap photoexcitation, yet local THz responses of crystalline microstructures are absent. We implement laser THz emission microscope (LTEM), yet-to-be applied to the perovskite semiconductors, as a novel and complementary tool to evaluate the electronic and grain heterogeneity of MAPbI<sub>3</sub> thin films. Two MAPbI<sub>3</sub> samples with different grain sizes are studied. Using this approach, we show that the one with a larger grain size gives more uniform THz radiation. More significant spatial THz intensity fluctuation is observed for the sample with a smaller grain size.https://www.mdpi.com/2073-4352/12/10/1462laser terahertz emission microscopeperovskiteterahertz imaging |
| spellingShingle | Zhaoyu Liu Liang Luo Joongmok Park Richard H. J. Kim Zhaoning Song Deniz Turan Mona Jarrahi Yanfa Yan Jigang Wang Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors Crystals laser terahertz emission microscope perovskite terahertz imaging |
| title | Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors |
| title_full | Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors |
| title_fullStr | Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors |
| title_full_unstemmed | Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors |
| title_short | Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Semiconductors |
| title_sort | laser terahertz emission microscope for imaging grain heterogeneity a case study of ch sub 3 sub nh sub 3 sub pbi sub 3 sub perovskite semiconductors |
| topic | laser terahertz emission microscope perovskite terahertz imaging |
| url | https://www.mdpi.com/2073-4352/12/10/1462 |
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