Charge Transport and Delayed Luminescence in Lanthanide Complexes with Organic Semiconductors for OLEDs Applications

• Grant number: 25/00658-3
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: April 01, 2025
• End date: March 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Rômulo Augusto Ando
• Grantee: Israel Ferreira da Costa
• Supervisor: Andrew Monkman
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Durham University (DU), England
• Associated to the scholarship: 22/12709-3 - Photophysical properties of lanthanide charge transfer complexes with organic semiconductors for applications in OLEDs, BP.PD

Abstract

This project addresses the research internship at the Organic Electroactive Materials (OEM) group at the Department of Physics at Durham University in UK, through the BEPE/FAPESP Postdoctoral program for 12 months. This proposal intends to develop organic light-emitting devices (OLEDs), exploring the photoluminescence (PL) and electroluminescent (EL) properties of the organic ligands and lanthanide (Ln3+: Sm3+, Eu3+, Gd3+, Tb3+, and Dy3+) complexes. In this vein, ¿-diketonates containing organic semiconductor units such as pyrene and carbazole will be investigated. This system is characterized by a rich ¿-conjugated bonds and extensive electron delocalization, which can significantly enhance the semiconductor properties of lanthanide complexes. In addition, these ligands can present delayed luminescence properties. Therefore, we intend to applied these compounds as emitting layer and/or charge transport layer in OLEDs, and also employ a range of time resolved spectroscopies to study the excited state behaviour in devices, exploring the photophysics of charge-transfer (CT) states and triplet excitons in these Ln-complexes. In this regard, the OEM group led by Prof. Andrew Monkman at Durham University, is a world leading research group providing extremely relevant contributions in the area of organic electronics, especially in time resolved spectroscopic investigation of materials for OLED applications focusing on Thermally Activated Delayed Fluorescence (TADF), Triplet-Triplet Annihilation (TTA), UP-Conversion Intersystem Crossing (uISC) and OLEDs based on these optical properties.