Optically active materials studied by scanning tunnelling microscopy

• Grant number: 21/06893-3
• Support Opportunities: Research Grants - Young Investigators Grants - Phase 2
• Start date: February 01, 2022
• End date: January 31, 2027
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Luiz Fernando Zagonel
• Grantee: Luiz Fernando Zagonel
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• City of the host institution: Campinas
• Associated research grant: 14/23399-9 - Heterostructures in semiconducting nanowires: nanometric light emitters studied by scanning tunnelling microscopy, AP.JP
• Associated scholarship(s): 25/19695-6 - Luminescent Materials studied by tip enhancement techniques in a Scanning Tunneling Microscopy, BP.PD; 24/17535-9 - Support to the research activities within the project Optically Active Materials studied by Scanning Tunnelling Microscopy, BP.TT; 23/04168-5 - Single photon emitters based on defects in hBN, BP.MS; + associated scholarships 23/00553-1 - Optically active materials studied by Scanning Tunneling Microscopy, BP.PD; 23/00090-1 - Controlling the luminescence in transition metal dichalcogenides, BP.DD; 22/06645-2 - Identifying morphological and spectral inhomogeneities in perovskites by luminescence and topography, BP.MS - associated scholarships

Abstract

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)

Scientific publications

(7)

(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., 2023-09-17. (21/06893-3, 19/14017-9)

SCALON, LUCAS; NOGUEIRA, CHARLES ALVES; FONSECA, ANDRE FELIPE VALE; MARCHEZI, PAULO E.; MORAL, RAPHAEL FERNANDO; GRANCINI, GIULIA; KODALLE, TIM; SUTTER-FELLA, CAROLIN M.; OLIVEIRA, CAIO COSTA; ZAGONEL, LUIZ F.; et al. 2D Phase Formation on 3D Perovskite: Insights from Molecular Stiffness. ACS APPLIED MATERIALS & INTERFACES, v. 16, n. 38, p. 11-pg., 2024-09-13. (21/06893-3, 20/04406-5, 23/10395-4, 18/01669-5, 22/06645-2, 17/11986-5)

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., 2023-04-20. (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)

COSTA, FABIO J. R.; ARRIBAS, DANIEL; BRITO, THIAGO G. L.; CHENG, TIN S.; BRADFORD, JONATHAN; THOMPSON, AMELIA; SAYWELL, ALEX; MELLOR, CHRISTOPHER J.; BETON, PETER H.; NOVIKOV, SERGEI V.; et al. Nanoscale Band Gap Modulation and Dual Moire Superlattices of Hexagonal Boron Nitride Weakly Coupled to Graphite. ACS NANO, v. 19, n. 40, p. 11-pg., 2025-10-02. (21/06893-3)

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., 2022-04-01. (21/06893-3, 18/08543-7, 14/23399-9)

CORDEIRO DE OLIVEIRA, WESLEY KARDEX; RUANO MERCHAN, CATALINA; REIS, LUANA A.; PARK, JEONG WOO; BAE, WAN KI; PADILHA, LAZARO A.; ZAGONEL, LUIZ FERNANDO. Low-Energy Cathodoluminescence of Type-I CdSe/ZnCdS Quantum Dots. Journal of Physical Chemistry C, v. 129, n. 33, p. 9-pg., 2025-08-08. (21/06803-4, 21/04411-1, 21/06893-3, 22/12929-3)

BRITO, THIAGO G. L.; COSTA, FABIO J. R.; CECCATTO, ALISSON; DE ALMEIDA, CHARLES A. N.; DE SIERVO, ABNER; COUTO JR, ODILON D. D.; BARCELOS, INGRID DAVID; ZAGONEL, LUIZ FERNANDO. Investigating the impact of ITO substrates on the optical and electronic properties of WSe₂ monolayers. Nanotechnology, v. 36, n. 5, p. 11-pg., 2025-02-03. (21/06803-4, 21/06893-3, 21/04411-1, 22/12929-3)