Study of the influence of humidity on mixed cation perovskites applied to photovoltaic devices

• Grant number: 20/04905-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: January 01, 2021
• End date: March 31, 2022
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Carlos Frederico de Oliveira Graeff
• Grantee: Larissa de Oliveira Garcia
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

Records show that in 2009 the efficiency of photoelectric conversion (PCE) of solar cells using Perovskites (PSCs) was 3.8% and nowadays it reaches 25.2%. In addition to being highly efficient, Perovskites (PVK) can be prepared with low-cost materials and techniques, making them an excellent technology to be commercialized. However, PSCs face long-term instability problems under realistic operating conditions varying from sensitivity to humidity, the presence of oxygen, heat and light stimuli, which remains an obstacle to their large-scale production. The formation of high-quality perovskite films depends not only on the deposition process, but also on the atmosphere during the growth of the material. Aiming at economic issues, there is a growing interest in the development of films of good stability in ambient air conditions, without the need for using inert atmosphere equipment, greatly reducing the cost involved in the process. Thus, this proposal aims to develop PVK films in a nitrogen atmosphere (H2O and O2 <0.1ppm) and in air (high humidity and oxygen), with focus on understanding the degradation processes and the influence of moisture on the formation and stability of the films. Minimizing PSC degradation processes is an important step towards commercialization. (AU)

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)

FERNANDES, SILVIA L.; GARCIA, LARISSA DE O.; RAMOS JUNIOR, ROBERTO DE A.; AFFONCO, LUCAS J.; BAGNIS, DIEGO; VILACA, RODRIGO; PONTES, FENELON M.; DA SILVA, JOSE H. D.; GRAEFF, CARLOS F. O.. The role of Nb2O5 deposition process on perovskite solar cells. Journal of Renewable and Sustainable Energy, v. 14, n. 4, p. 8-pg., 2022-07-01. (20/12356-8, 20/04905-1, 13/07296-2)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GARCIA, Larissa de Oliveira. Study and characterization of mixed cation perovskite solar cells. 2022. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências. Bauru Bauru.