Spectroscopic ellipsometry study of FAxMA1−xPbI3 hybrid perovskite single crystals
| Autor: | Bethan Charles, Miquel Garriga, Mark T. Weller, Maria Isabel Alonso, Alejandro R. Goñi, Adrián Francisco-López |
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| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), Generalitat de Catalunya |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Solar cells
Materials science Photoluminescence Optical metrology Analytical chemistry Halide Electronic bandstructure 02 engineering and technology 01 natural sciences 0103 physical sciences Materials Chemistry Perovskites Electrical and Electronic Engineering Polymorphism Electronic band structure Instrumentation Perovskite (structure) 010302 applied physics business.industry Process Chemistry and Technology 021001 nanoscience & nanotechnology Light emitting diodes Surfaces Coatings and Films Electronic Optical and Magnetic Materials Semiconductor Formamidinium 0210 nano-technology business Single crystal Solid solution |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Conference Collection: 8th International Conference on Spectroscopic Ellipsometry 2019, ICSE Organic-inorganic hybrid perovskites have the generic formula ABX3, where X denotes a halide anion and A and B stand for an organic and a metal cation, respectively. These hybrid compounds are semiconductors with highly interesting and tunable properties. They are the subject of intense research for several applications, mainly in solar cells but also as light-emitting diodes and lasers. Tunability of the optical properties may be accomplished by site-substituted solid solutions in A, B, or X sites. In particular, some mixed-cation systems show increased stability for these applications. In this work, the authors report on the variation of the optical constants in mixed A-site cation methylammonium/formamidinium (MA/FA) lead iodide perovskites FAxMA1−xPbI3 evaluated by spectroscopic ellipsometry in single crystal samples. The two main polymorphs of FAPbI3 are measured. The study is complemented by photoluminescence measurements to gain a better insight into observed spectroscopic features related to the electronic interband transitions of the crystals and their structural integrity. The main result is a continuous variation of the pseudocubic perovskite band structure of the solid solutions between the two end compounds MAPbI3 and α-FAPbI3. The authors gratefully acknowledge Oliver J. Weber and Mariano Campoy-Quiles for their helpful comments. The Spanish Ministerio de Ciencia, Innovación y Universidades is acknowledged for its support through Grant No. SEV-2015-0496 in the framework of the Spanish Severo Ochoa Centre of Excellence program and through Grant Nos. MAT2015-70850-P (HIBRI2) and PGC2018-095411-B-100 (RAINBOW). The authors also acknowledge the AGAUR for Grant No. 2017-SGR-00488. B.C. acknowledges the Engineering and Physical Sciences Research Council (EPSRC) for Ph.D. studentship funding via the CSCT CDT (No. EP/G03768X/1). A.F.L. acknowledges the Ph.D. program in Materials Science from Universitat Autònoma de Barcelona in which he is enrolled and an FPI fellowship (No. BES-2016-076913) from the Spanish Ministerio, co-financed by the European Social Fund. |
| Databáze: | OpenAIRE |
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