Metal-semiconductor transition in thin film MAPbI3 perovskite
| Autor: | Luigi Angelo Castriotta, Barbara Paci, Valerio Campanari, Amanda Generosi, Massimiliano Lucci, Marco Guaragno, Matteo Cirillo, Aldo Di Carlo, Roberto Francini |
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| Rok vydání: | 2020 |
| Předmět: |
optical properties
010302 applied physics Diffraction Settore FIS/03 Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Settore ING-INF/01 perovskites 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences phase transitions X-ray diffraction Tetragonal crystal system thin films Electrical resistivity and conductivity Electric field Lattice (order) 0103 physical sciences Orthorhombic crystal system Thin film 0210 nano-technology Excitation electrical resistivity |
| Zdroj: | Applied physics letters (Online) 117 (2020). doi:10.1063/5.0039738 info:cnr-pdr/source/autori:Valerio Campanari, Massimiliano Lucci, Luigi Angelo Castriotta, Barbara Paci, Amanda Generosi, Marco Guaragno, Roberto Francini, Matteo Cirillo, Aldo Di Carlo/titolo:Metal-semiconductor transition in thin film MAPbI3 perovskite/doi:10.1063%2F5.0039738/rivista:Applied physics letters (Online)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:117 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | The structural and electronic properties of the methylammonium lead iodide (MAPbI3, MA ¼ CH3NH3) perovskite are investigated as a function of temperature by transport measurements, in situ x-ray diffraction, and optical emission. Lowering the temperature, a transition from the tetragonal to the orthorhombic phase takes place, around 160 K. Such structural transition, monitored by temperature-dependent in situ x-ray diffraction and optical emission, is followed by an inversion of the temperature dependence of the electrical resistivity from a semiconductor-like dependence to a metal-like one. The temperature for such semiconductor-metal transition, depending both on the applied electric field and on the optical excitation, is always below the phase transition temperature. The results demonstrate that perovskite materials display interesting scenarios in which lattice structural transitions combined with optical or electrical excitation strongly affect transport properties. The consequences of these characteristics are analyzed in fundamental and applied science perspectives. |
| Databáze: | OpenAIRE |
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