Alejandro R. Goñi

Institut de Ciència de Materials de Barcelona

Engineering Sciences

I was born in Córdoba, Argentina, and graduated in physics in 1985 from Balseiro Institute, Bariloche, Argentina. In 1986 I moved to Germany for my PhD at the Max-Planck Institute FKF in Stuttgart with Prof. M. Cardona, which I finished in 1989. It followed a two-years postdoc at AT&T Bell Labs in Murray Hill, USA, and back to the MPI Stuttgart for three years. In 1996 I switched to the Technical University of Berlin for an appointment as Research & Teaching Associate. In 1999 I was awarded the Karl-Scheel Prize of the Physical Society of Berlin for my contributions to the field of high-pressure semiconductor physics. I joined the Optoelectronic Properties of Nanostructured Materials group at ICMAB-CSIC in November 2003 as ICREA. I created a facility for optical spectroscopy with micro and nanometer-scale resolution and set up a laboratory for high-pressure physics. I am leading group activities on high pressure and hybrid perovskites.

Research interests

I am an experimental physicist with broad interests and expertise in solid-state physics, optical spectroscopy (Raman scattering, photoluminescence, etc.), nano-science and technology, thermoelectricity, the 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 organic and/or inorganic molecular and nano-materials, searching for new behaviors or phenomena that emerge as a direct consequence of the reduced dimensionality and/or size of the material system under study. Although I am pursuing basic research, almost all my lines of investigation have a clear application in mind, such as to improve the performance of optoelectronic devices based on nano-materials, enhance thermoelectric and/or photovoltaic properties, boost piezo-resistive coefficients, develop ultra-sensitive spectroscopic techniques, etc.

Selected publications

- Espinha A, Dore C, Matricardi C, Alonso MI, Goñi AR, Mihi A 2018, 'Hydroxypropyl Cellulose Photonic Architectures by Soft Nanoimprinting Lithography', Nature Photon. 12, 343-348.

- Francisco-López A, Charles B, Weber OJ, Alonso MI, Garriga M, Campoy-Quiles M, Weller MT & Goñi AR 2018, 'Pressure-Induced Locking of Methylammonium Cations Versus Amorphization in Hybrid Lead Iodide Perovskites', J. Phys. Chem. C. 122, 22073-22082.

- Reparaz JS, Pereira da Silva K, Romero AH, Serrano J, Wagner MR, Callsen G, Choi S, Speck JS & Goñi AR 2018, 'Comparative Study of the Pressure Dependence of Optical-Phonon Transverse-Effective Charges and Linewidths in Wurtzite InN', Phys. Rev. B. 98, 165204/1-7.

- Bi Z, Rodríguez-Martínez X, Aranda C, Pascual San José E, Goñi AR, Bisquert J, Xu X, Campoy-Quiles M & Guerrero A 2018, 'Defect Tolerant Perovskite Solar Cells from Blade Coated Non-Toxic Solvents', J. Mater. Chem. A. 6, 19085-19093.

- Vaccaro PO, Alonso MI, Garriga M, Gutiérrez J, Peró D, Wagner MR, Reparaz JS, Sotomayor-Torres CM, Vidal X, Carter EA, Lay PA, Yoshimoto M & Goñi AR 2018, 'Localized Thinning for Strain Concentration in Suspended Germanium Membranes and Optical Method for Precise Thickness Measurement',  AIP Adv. 8, 115131/1-11.

- Moreno Fernández H, Zangrando M, Sauthier G, Goñi AR, Carlino V & Pellegrin E 2018, 'Towards Chemically Neutral Carbon Cleaning Processes: Plasma Cleaning of Ni, Rh, and Al Reflective Optical Coatings and Thin Al Filters for Free Electron Lasers and Synchrotron Beamline Applications', J. Synchrotron Rad. 25, 1642-1649.

Selected research activities

- Chairman & organizer of Joint 18th Int. Conf. on High Pressure Semiconductor Physics (HPSP18) and 2nd Workshop on High-pressure Study of Superconductors (WHS2), CosmoCaixa Museum, Barcelona, Spain, July 23 - 27, 2018.

- Coordinator & organizer of Severo Ochoa Summer School on Materials for Energy (MATENER2018), ICMAB-CSIC, Bellaterra, Spain, September 17 - 20, 2018.