Conference
First experimental determination of the band dispersion of CH3 NH3 PbI3 hybrid organic-inorganic perovskite
| العنوان: | First experimental determination of the band dispersion of CH3 NH3 PbI3 hybrid organic-inorganic perovskite |
|---|---|
| المؤلفون: | Lee, Min-I, Barragán, A, Nair, M.N., Jacques, V., Le Bolloc'H, D., Fertey, P., Jemli, K., Lédée, F., Deleporte, Emmanuelle, Trippé-Allard, G., Taleb-Ibrahimi, A., Tejeda, A. |
| المساهمون: | Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Journées Scientifiques du Comité Spectroscopie d’Electrons ; https://hal.science/hal-01571286 ; Journées Scientifiques du Comité Spectroscopie d’Electrons, May 2017, Paris, France. pp.391 - 135105 |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] |
| جغرافية الموضوع: | Paris, France |
| الوصف: | National audience ; Organic-inorganic hybrid perovskites are promising absorber materials for low-cost photovoltaic solar cells or optoelectronic devices [1-4]. Among these perovskites, methylammonium triiodideplumbate (CH3NH3PbI3 , MAPbI3 or MAPI) exhibits currently the highest efficiency. Here we have analyzed the structural transition in MAPI by X-ray diffraction at the β phase and we have correlated it to its electronic properties. Despite all the extensive work on hybrid organic-inorganic halide perovskites, their experimental band structure measured with k-resolution has remained elusive. Such an experimental determination is a necessary requirement for an accurate theoretical description and understanding of the system. The impact of the structural phase transitions on the band structure in the operation temperature range of solar cells needed also to be elucidated. Herein, we present the experimental determination of the band structure of MAPI with k resolution by angle-resolved photoemission at 170 K [5]. Our results show that the spectral weight is strongly affected by the cubic symmetry although traces of the tetragonal band structure are appreciated. Some deviations with respect to theoretical calculations are observed, which may help to reach a more precise description of this paradigmatic system of the hybrid perovskite family. The project leading to this application has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 687008 (GOTSolar). |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | hal-01571286; https://hal.science/hal-01571286 |
| الاتاحة: | https://hal.science/hal-01571286 |
| رقم الانضمام: | edsbas.6F6CEA7E |
| قاعدة البيانات: | BASE |
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