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The role of Nb2O5 deposition process on perovskite solar cells

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Autor(es):
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.
Número total de Autores: 9
Tipo de documento: Artigo Científico
Fonte: Journal of Renewable and Sustainable Energy; v. 14, n. 4, p. 8-pg., 2022-07-01.
Resumo

Two different methods are used to deposit Nb2O5 as compact electron transport layers in n-i-p double cation mixed-halide perovskite Cs(0.17)FA(0.83)Pb(I0.83Br0.17)(3) solar cells: reactive sputtering and spin coating. These different Nb2O5 films influenced perovskite growth and the charge transport in the cells. Photovoltaic parameters were obtained with an average power conversion efficiency of 17.0% and 15.7% for the devices based on sputtered and spin-coated Nb2O5, respectively. The mobility and the extracted charges were higher in sputtered Nb2O5-based devices than in the spin-coated ones. This effect is attributed to the larger grain sizes observed in the perovskite films when deposited onto the sputtered Nb2O5 layers. The higher densities of grain boundaries in the spin-coated Nb2O5-based devices increase ion diffusion and are expected to decrease efficiency. Published under an exclusive license by AIP Publishing. (AU)

Processo FAPESP: 20/12356-8 - Otimização da estabilidade de células solares de perovskitas
Beneficiário:Carlos Frederico de Oliveira Graeff
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 20/04905-1 - Estudo da influência de umidade em perovskitas de cátions mistos aplicadas a dispositivos fotovoltaico
Beneficiário:Larissa de Oliveira Garcia
Modalidade de apoio: Bolsas no Brasil - Mestrado
Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
Beneficiário:Elson Longo da Silva
Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs