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van de Goor TW, Liu Y, Feldmann S, Bourelle SA, Neumann T, Winkler T, Kelly ND, Liu C, Jones MA, Emge SP, Friend RH, Monserrat B, Deschler F, Dutton SE. Impact of Orientational Glass Formation and Local Strain on Photo-Induced Halide Segregation in Hybrid Metal-Halide Perovskites. J Phys Chem C Nanomater Interfaces 2021; 125:15025-15034. [PMID: 34295448 PMCID: PMC8287560 DOI: 10.1021/acs.jpcc.1c03169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 06/15/2021] [Indexed: 05/27/2023]
Abstract
Band gap tuning of hybrid metal-halide perovskites by halide substitution holds promise for tailored light absorption in tandem solar cells and emission in light-emitting diodes. However, the impact of halide substitution on the crystal structure and the fundamental mechanism of photo-induced halide segregation remain open questions. Here, using a combination of temperature-dependent X-ray diffraction and calorimetry measurements, we report the emergence of a disorder- and frustration-driven orientational glass for a wide range of compositions in CH3NH3Pb(Cl x Br1-x )3. Using temperature-dependent photoluminescence measurements, we find a correlation between halide segregation under illumination and local strains from the orientational glass. We observe no glassy behavior in CsPb(Cl x Br1-x )3, highlighting the importance of the A-site cation for the structure and optoelectronic properties. Using first-principles calculations, we identify the local preferential alignment of the organic cations as the glass formation mechanism. Our findings rationalize the superior photostability of mixed-cation metal-halide perovskites and provide guidelines for further stabilization strategies.
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Affiliation(s)
- Tim W.
J. van de Goor
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Yun Liu
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Sascha Feldmann
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Sean A. Bourelle
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Timo Neumann
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
- Walter
Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Thomas Winkler
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
- Department
of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - Nicola D. Kelly
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Cheng Liu
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Michael A. Jones
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Steffen P. Emge
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Richard H. Friend
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Bartomeu Monserrat
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
- Department
of Materials Science and Metallurgy, University
of Cambridge, 27 Charles
Babbage Road, Cambridge CB3 0FS, U.K.
| | - Felix Deschler
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
- Walter
Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Siân E. Dutton
- Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
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Meng F, Donnelly C, Abert C, Skoric L, Holmes S, Xiao Z, Liao JW, Newton PJ, Barnes CH, Sanz-Hernández D, Hierro-Rodriguez A, Suess D, Cowburn RP, Fernández-Pacheco A. Non-Planar Geometrical Effects on the Magnetoelectrical Signal in a Three-Dimensional Nanomagnetic Circuit. ACS Nano 2021; 15:6765-6773. [PMID: 33848131 PMCID: PMC8155340 DOI: 10.1021/acsnano.0c10272] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Expanding nanomagnetism and spintronics into three dimensions (3D) offers great opportunities for both fundamental and technological studies. However, probing the influence of complex 3D geometries on magnetoelectrical phenomena poses important experimental and theoretical challenges. In this work, we investigate the magnetoelectrical signals of a ferromagnetic 3D nanodevice integrated into a microelectronic circuit using direct-write nanofabrication. Due to the 3D vectorial nature of both electrical current and magnetization, a complex superposition of several magnetoelectrical effects takes place. By performing electrical measurements under the application of 3D magnetic fields, in combination with macrospin simulations and finite element modeling, we disentangle the superimposed effects, finding how a 3D geometry leads to unusual angular dependences of well-known magnetotransport effects such as the anomalous Hall effect. Crucially, our analysis also reveals a strong role of the noncollinear demagnetizing fields intrinsic to 3D nanostructures, which results in an angular dependent magnon magnetoresistance contributing strongly to the total magnetoelectrical signal. These findings are key to the understanding of 3D spintronic systems and underpin further fundamental and device-based studies.
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Affiliation(s)
- Fanfan Meng
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
| | - Claire Donnelly
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
| | - Claas Abert
- Faculty
of Physics, University of Vienna, Vienna, 1090, Austria
- Research
Platform MMM Mathematics-Magnetism-Materials, University of Vienna, Vienna, 1090, Austria
| | - Luka Skoric
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
| | - Stuart Holmes
- London
Centre for Nanotechnology, UCL, London, WC1H 0AH, U.K.
| | - Zhuocong Xiao
- Nanoscience
Centre, University of Cambridge, Cambridge, CB3 0FF, U.K.
| | - Jung-Wei Liao
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
| | - Peter J. Newton
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
| | | | - Dédalo Sanz-Hernández
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
- Unité
Mixte de Physique, CNRS, Thales, Université
Paris-Saclay, Palaiseau, 91767, France
| | - Aurelio Hierro-Rodriguez
- Depto.
Física, Universidad de Oviedo, Oviedo, 33007, Spain
- SUPA,
School of Physics and Astronomy, University
of Glasgow, Glasgow, G12 8QQ, U.K.
| | - Dieter Suess
- Faculty
of Physics, University of Vienna, Vienna, 1090, Austria
- Research
Platform MMM Mathematics-Magnetism-Materials, University of Vienna, Vienna, 1090, Austria
| | | | - Amalio Fernández-Pacheco
- Cavendish
Laboratory, University of Cambridge, Cambridge, CB3 0HE, U.K.
- SUPA,
School of Physics and Astronomy, University
of Glasgow, Glasgow, G12 8QQ, U.K.
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