Revealing the Perovskite Film Formation Using the Gas Quenching Method by In Situ GIWAXS: Morphology, Properties, and Device Performance

Autor(es)

Szostak, Rodrigo ^{[1, 2, 3]} ; Sanchez, Sandy ^[3] ; Marchezi, Paulo E. ^[1] ; Marques, Adriano S. ^[1] ; Silva, Jeann C. ^[1] ; Holanda, Matheus S. ^[1] ; Hagfeldt, Anders ^[3] ; Tolentino, Helio C. N. ^[2] ; Nogueira, Ana F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Lab Nanotecnol & Energia Solar LNES, BR-13083970 Campinas - Brazil

^[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083100 Campinas - Brazil

^[3] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn ISIC, Lab Photomol Sci LSPM, CH-1015 Lausanne - Switzerland

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED FUNCTIONAL MATERIALS; v. 31, n. 4 JAN 2021.
• Citações Web of Science: 0

Resumo

The optoelectronic properties, morphology, and consequently the performance of metal halide perovskite solar cells are directly related to the crystalline phases and intermediates formed during film preparation. The gas quenching method is compatible with large-area deposition, but an understanding of how this method influences these properties and performance is scarce in the literature. Here, in situ grazing incidence wide angle X-ray scattering is employed during spin coating deposition to gain insights on the formation of MAPbI(3)and Cs(x)FA(1-)(x)Pb(I0.83Br0.17)(3)perovskites, comparing the use of dimethyl sulfoxide (DMSO) and 2-methyl-n-pyrrolidone (NMP) as coordinative solvents. Intermediates formed using DMSO depend on the perovskite composition (e.g., Cs content), while for NMP the same intermediate {[}PbI2(NMP)] is formed independently on the composition. For MAPbI(3)and Cs(x)FA(1-)(x)Pb(I0.83Br0.17)(3)with a small amount of Cs (10% and 20%), the best efficiencies are achieved using NMP, while the use of DMSO is preferred for higher (30% and 40%) amount of Cs. The inhibition of the 2H/4H hexagonal phase when using NMP is crucial for the final performance. These findings provide a deep understanding about the formation mechanism in multication perovskites and assist the community to choose the best solvent for the desired perovskite composition aiming to perovskite-on-silicon tandem solar cells. (AU)

• Processo FAPESP: 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país
• Beneficiário: Ana Flávia Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 17/12582-5 - Perovskitas com cátions mistos: Relação entre estrutura, composição, propriedades eletrônicas e eficiência das células solares
• Beneficiário: Rodrigo Szostak
• Modalidade de apoio: Bolsas no Brasil - Doutorado