Interfacial Behavior of Quantum Dots Integrated in Bulk Heterojunction Perovskite Films

• Grant number: 24/05914-5
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: January 13, 2025
• End date: January 12, 2026
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Ana Flávia Nogueira
• Grantee: André Felipe Vale da Fonseca
• Supervisor: Ivan Mora-Sero
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Universitat Jaume I, Spain
• Associated to the scholarship: 23/10395-4 - Applying quantum dots passivation towards high-stability perovskite solar cells, BP.PD

Abstract

Perovskite Solar Cells (PSCs) have emerged as a promising categoryof high-efficiency solar cells. Despite their remarkable efficiency, the commercializationof PSCs faces challenges due to their limited operational stability under variousenvironmental conditions. To overcome this hurdle, multifunctional strategies forpassivating perovskite-based devices have been explored, with the incorporation ofQuantum Dots (QDs) showing significant potential. This project aims to efficientlyintegrate QDs into organic-inorganic perovskite films and investigate these bulkheterojunctions using spectroscopic and electrical measurements. The specific objectivesinclude synthesizing various QDs, integrating them into perovskite films, employingoptimized strategies to assemble PSCs for improved performance and stability, andcharacterizing the resulting devices using spectroscopic and electrical techniques. CdX(X=S or Se) quantum dots (QDs) will be synthesized and incorporated into FAPI or MAPIperovskite films. Surface ligands of synthesized QDs will be exchanged using aninorganic passivation method involving perovskite precursor ions. These dot-inperovskite films will be characterized using time-resolved spectroscopic methods andapplied in PSCs, which will be thoroughly evaluated using impedance-basedcharacterization techniques. Overall, this project aims to advance understanding of QD/perovskite interactions and their influence on PSC performance, with the ultimate goal ofenhancing efficiency and stability.