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Ivan Bechtold, professor da UFSC e diretor científico da SBPMat, explica como se faz ciência no Brasil e qual é o papel dos pós-docs nesse processo, e faz um convite à toda a sociedade para ajudar a divulgar a campanha.

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Metal halide perovskite materials: beyond solar cells

Ana Flavia Nogueira
Laboratório de Nanotecnologia e Energia Solar (LNES), Chemistry Institute, University of Campinas

Abstract:

Metal halide perovskite materials have been extensively investigated as thin films or colloidal nanoparticles in several technological applications, such as photovoltaic cells (PV), lasers, photodetectors and light emitting diodes (LED).
Perovskite is the name given to materials that have the general formula ABX3 with a structure similar to the mineral CaTiO3. In perovskite materials for PV, the monovalent cation “A” is an organic cation such a methylammonium (CH3NH3+, MA) or formamidinium (CH(NH2)2+, FA). For LED applications, “A” is an inorganic cation as Cs+, Rb+. In both applications, “B” is a divalent cation Pb2+ or Sn2+, and “X” a halogen anion Cl-, Br- or I-. The optoelectronic properties that make perovskites attractive are their direct and tunable band gap (that can be varied due to quantum confinement or composition), high absorption coefficient (similar to GaAs), ambipolar transport of charges, high mobility of electrons and holes compared with organic semiconductors, and electron diffusion lengths that can exceed micrometers in large crystals. Multicomponent perovskite solar cells have reached the recent efficiency breakthrough of 25.2%, higher than silicon polycrystalline photovoltaics

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The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

Alexandro Amorim Linhares

CATION EXCHANGE MEMORY DEVICES BASED ON THE DIVALENT CATIONS Cd, Zn and Mg

Defense Commitee

Prof. Dr. André Avelino Pasa – (president) – UFSC/FSC
Drª. Paloma Boeck Souza – (external member) – UFSC/PPGCEM
Profª. Drª. Cristiani Campos Plá Cid – (miembro titular) – UFSC/FSC
Profª. Drª. Deise Schafer – (miembro titular) – UFSC/FSC

Date: September 4, 2020 – friday – Time: 2:00 pm – Place: sala virtual da conferênciaweb da rede nacional de pesquisa

virtual room access link: https://conferenciaweb.rnp.br/webconf/ppgfsc-ufsc