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Japan-Brazil research collaboration for green electronics -Study of non-toxic halide perovskite thin-film solar cells-

Grant number: 19/22419-0
Support type:Regular Research Grants
Duration: March 01, 2020 - July 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Cooperation agreement: University of Tsukuba
Mobility Program: SPRINT - Projetos de pesquisa - Mobilidade
Principal researcher:Ana Flávia Nogueira
Grantee:Ana Flávia Nogueira
Principal researcher abroad: Takeaki Sakurai
Institution abroad: University of Tsukuba, Japan
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:17/11986-5 - Research Division 1 - dense energy carriers, AP.PCPE


Increasing global energy demand and environmental concerns have prompted the development of renewable energy technologies. Photovoltaic (PV) technology has become explosively popular because it can convert vast amounts of solar energy into electrical energy. However, to achieve further spread in the future, new materials different from the currently popular silicon that can be used for lightweight and flexible applications such as architectures and electrically driven vehicles are required. In recent years, organic-inorganic hybrid perovskite based solar cells (PSC), such as methylammonium lead iodide (MAPbI3), have attracted considerable attention due to their high power conversion efficiency (PCE) of 25.2 %. However, toxicity and stability issues have hampered the commercialization of PSC. The toxicity of lead-based PSC is a significant obstacle to their practical use. Therefore, lead-free PSCs where other ions such as tin, germanium, and bismuth replaced lead were investigated. In addition, in the case of PSC, perovskite materials themselves, which are sensitive to moisture and oxygen, have important stability issues. Therefore, research to obtain a stable crystal structure such as 2D perovskite by replacing methylammonium (MA) with another organic cation, some additives, cesium, etc. is in progress. As mentioned above, material research is actively attempted to overcome the toxicity and stability issues of PSCs. However, Halide Perovskite is a multinary compound and its crystal structure is difficult to control. It is also important to understand how local composition fluctuation and defects are formed and how energy loss is induced, systematically (AU)

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