Alejandro Goñi

Alejandro Goñi

Institut de Ciència de Materials de Barcelona

Engineering Sciences

I graduated in physics in 1985 at the Balseiro Institute, Argentina. In 1989 I finished my PhD at the Max-Planck Institute FKF in Stuttgart with Prof. M. Cardona. It followed a two-years postdoc at AT&T Bell Labs in Murray Hill, USA, and back at MPI-FKF Stuttgart for three years. In 1996 I moved to the Technical University of Berlin for an appointment as Research & Teaching Associate, where in 1998 I completed my Habilitation. In 1999 I received the Karl-Scheel Prize from the Physical Society of Berlin for my contributions to the field of high-pressure semiconductor physics. I joined the Optoelectronic Properties of Nanostructured Materials (NANOPTO) group at ICMAB-CSIC in November 2003 as ICREA. At ICMAB I created a facility for optical spectroscopy with micro and nanometer-scale resolution and set up a laboratory for high-pressure physics.

Research interests

I am an experimental physicist with broad interests and experience in solid-state physics, optical spectroscopy (Raman scattering, photoluminescence, etc.), nanoscience and technology, energy materials, physics of low-dimensional materials (superlattices, quantum wires and dots), highly correlated electron systems, and high-pressure techniques. Essentially, I use light as a probe of the physical properties of all kinds of molecular materials and organic and/or inorganic nanomaterials, looking for new behaviors or phenomena that arise as a direct consequence of the reduced dimensionality and/or size of the material system under study. Although I dedicate myself to basic research, I always have a clear application in mind, such as improving the performance of optoelectronic devices, enhancing thermoelectric and/or photovoltaic properties, boosting solar energy conversion efficiency, develop ultra-sensitive spectroscopic techniques, etc. I currently lead group activities on high pressure physics, hybrid metal-halide perovskites, plasmon-assisted hot-electron emitters and the development of a spectrum-on-demand light source.

Selected publications

- Gibert-Roca M, Casademont-Viñas M, Liu Q, Vandewal K, Goñi AR & Campoy-Quiles M 2023, 'RAINBOW organic solar cells: Implementing spectral splitting in lateral multi-junction architectures', Adv. Mater. 2212226/1-16.
- Casademont-Viñas M, Gibert-Roca M, Campoy-Quiles M & Goñi AR 2023, 'Spectrum on Demand Light Source (SOLS) for Advanced Photovoltaic Characterization', Rev. Sci. Instrum., 94, 103907.
- Xu K, Pérez-Fidalgo L, Charles BL, Weller MT, Alonso MI & Goñi AR 2023, 'Using Pressure to Unravel the Structure-Dynamic-Disorder Relationship in Metal Halide Perovskites', Sci. Rep. 13, 9300/1-12.
- Pérez-Fidalgo L, Xu K, Charles BL, Henry PF, Weller MT, Alonso MI & Goñi AR 2023, 'Anomalous Electron-Phonon Coupling in Cesium-Substituted Methylammonium Lead Iodide Perovskites', J Phys Chem C, 127, 22817−22826.
- González-Pato N, Rodriguez Rodriguez X, Pellizzi N, Fasolato C, Guasch J, Postorino P, Veciana J, Goñi AR, Ratera I 2023, 'Electroactive substrates for surface-enhanced Raman spectroscopy based on overgrown gold-nanoparticle arrays by electrodeposition on indium tin oxide', Mater. Adv. 4, 1378-1388.
- Xu K, Guo J, Raciti G, Goñi AR, Alonso MI, Borrisé X, Zardo I, Campoy-Quiles M & Reparaz JS 2023, 'In-Plane Thermal Diffusivity Determination using Beam-Offset Frequency-Domain Thermoreflectance with a One-Dimensional Optical Heat Source', Int. J. Heat Mass Transf. 214, 124376/1-11.
- Testa-Anta M, Majcherkiewicz JN, Xu K, Goñi AR & Salgueiriño V 2023, 'Room Temperature Spin-Phonon Coupling in Cr2O3 Nanocrystals', Adv. Funct. Mater. 2301973/1-9', Adv. Funct. Mater., 33, 2301973.

Selected research activities

Awards: SOLS-Acelerador de Technologias Fotovoltaicas Emergentes, Goñi, Campoy, Pujades & Casademont. a)EmErgEnt'23 Prize, categoria Llavor, Clùster de l'Energia Eficient de Catalunya (CEEC), 10a Ed. La Nit de Eficiència NITEE2023, Barcelona, 2023. b)Top 10 finalist, 6th ed. "Premio Ideas Innovadoras, Isabel P. Trabal", Foundation Caja de Ingenieros.