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Optically active materials studied by scanning tunnelling microscopy


This project aims to consolidate a research group focused on optical and electronic properties of optically active materials (absorbers and emitters) studied through Scanning Tunneling Microscopy (STM) associated with a high-performance optical device. This device, which was patented by our team, allows the detection of the light emission induced by the tunneling current and also the injection of light in the vicinity of the STM tip. With this infrastructure, it is possible to study the morphology, electronic structure and light emission of individual nanostructures with high spatial and spectral resolution. The objectives of this proposal are to continue research activities in two-dimensional (2D) materials (h-BN and TMDs) and start research in other materials, in particular on 2D halides perovskites. We will pay attention to technologically relevant problems concerning materials that are have potential application as light emitters and light absorber in future devices such as solar cells and light emitting diodes. These problems include determining band alignments and band edges, substrate effects, defects, line broadening, and other with direct impact on device performance. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
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Sharper images 
Un sistema inédito mejora el rendimiento de un microscopio con resolución atómica 
New system improves the performance of atomic-resolution microscopes 
Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
COSTA, FABIO J. R.; BRITO, THIAGO G-L; BARCELOS, INGRID D.; ZAGONEL, LUIZ FERNANDO. Impacts of dielectric screening on the luminescence of monolayer WSe2. Nanotechnology, v. 34, n. 38, p. 10-pg., . (21/06893-3, 19/14017-9)
SOUSA, CLAUDEVAN A.; BONATO, LUIZ G.; GONCALVES, EDUARDO S.; ALO, ARTHUR; VALE, BRENER R. C.; ALMEIDA, DIOGO B.; NOGUEIRA, ANA F.; ZAGONEL, LUIZ F.; PADILHA, LAZARO A.. Addressing the Magnitude of the Nonlinear Refraction Response in Perovskite Nanocrystals. ACS PHOTONICS, v. 10, n. 5, p. 7-pg., . (17/11986-5, 20/06956-2, 22/06267-8, 18/15574-6, 21/13262-0, 18/08988-9, 20/16077-6, 19/22576-8, 21/06893-3, 18/25339-4)
PENA ROMAN, RICARDO JAVIER; AUAD, YVES; GRASSO, LUCAS; PADILHA, LAZARO A.; ALVAREZ, FERNANDO; BARCELOS, INGRID DAVID; KOCIAK, MATHIEU; ZAGONEL, LUIZ FERNANDO. Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope. Review of Scientific Instruments, v. 93, n. 4, p. 18-pg., . (21/06893-3, 18/08543-7, 14/23399-9)

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