| Autor: |
Zhaoyu Liu, Liang Luo, Joongmok Park, Richard H. J. Kim, Zhaoning Song, Deniz Turan, Mona Jarrahi, Yanfa Yan, Jigang Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Crystals, Vol 12, Iss 10, p 1462 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2073-4352 |
| DOI: |
10.3390/cryst12101462 |
| Popis: |
Strong terahertz (THz) emission from the methylammonium lead iodide (MAPbI3) 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 MAPbI3 thin films. Two MAPbI3 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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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