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Applying quantum dots passivation towards high-stability perovskite solar cells

Grant number: 23/10395-4
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): December 01, 2023
Effective date (End): November 30, 2025
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Ana Flávia Nogueira
Grantee:André Felipe Vale da Fonseca
Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Host Company:Universidade Estadual de Campinas (UNICAMP). Instituto de Química (IQ)
Associated research grant:17/11986-5 - Generation and storage of New Energy: bringing technological development for the country, AP.PCPE

Abstract

Solar energy is widely recognized as one of the most promising alternative energy sources due to its abundance, cleanliness, and safety. While the photovoltaic energy market has traditionally relied on crystalline silicon solar panels, recent years have witnessed a rapid emergence of perovskite solar cells (PSCs), offering high efficiency at low cost. However, the commercialization of PSCs faces a significant hurdle in their limited operational stability, particularly in challenging environmental conditions such as high humidity, intense radiation, and oxygen exposure. To address this challenge, numerous strategies have been explored, including composition optimization, surface passivation, and engineering/optimization of photovoltaic device interfaces. In this research project, we aim to evaluate the effectiveness of different quantum dots (QDs) as surface passivation agents for perovskite solar cells. These QDs possess remarkable properties, such as defect suppression and enhanced charge carrier separation at the interface through energy level alignment with charge transfer layers (CTLs). The passivation mechanism will be extensively investigated through a range of spectroscopic techniques, including time-resolved photoluminescence (trPL) and in-situ photoluminescence (PL), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR). Electrochemical measurements, such as space-charge-limited current (SCLC), will complement these studies. Additionally, advanced synchrotron-based methods, specifically nano-FTIR, will be employed to gain deeper insights into the passivation mechanisms. Following a thorough investigation and optimization, the most promising QD compositions will be incorporated into perovskite solar cells and subjected to rigorous stability evaluations under thermal and/or light stress conditions using ISOS protocols. In conclusion, the successful execution of this research project holds great potential for the development of highly stable perovskite solar cells, a crucial factor for the widespread adoption of this technology. By pushing the boundaries of stability, we aim to facilitate the emergence of perovskite solar cells as a viable and sustainable energy solution, rivaling the dominance of silicon-based solar panels in the market. (AU)

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