| Texto completo | |
| Autor(es): |
Lemos, Hugo G. G.
;
Rossato, Jessica H. H.
;
Ramos Jr, Roberto A. A.
;
Lima, Joao V. M.
;
Affonco, Lucas J. J.
;
Trofimov, Sergei
;
Michel, Jose J. I.
;
Fernandes, Silvia L. L.
;
Naydenov, Boris
;
Graeff, Carlos F. O.
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS CHEMISTRY C; v. N/A, p. 10-pg., 2023-01-31. |
| Resumo | |
Nb2O5 shows promising features for electron transport layers (ETL) in perovskite solar cells (PSCs), such as suitable band alignment and ultraviolet stability. Here, we studied the incorporation of Ti3C2Tx MXene in a solution-processable compact layer as a component of ETLs for PSCs. The addition of 0.4 wt% MXene with respect to niobium ethoxide was shown to enhance the PCE (19.46% for the champion device) and stability (96% of its original PCE after 500 hours) compared to pristine devices. The improved performance of the Nb2O5-Ti3C2 devices (0.4 wt%) could be attributed to the adapted alignment of the energy band between perovskite and ETL layers, which favors electron transport and extraction. In addition, the high electrical conductivity of MXenes worked as a free pathway for the extracted electrons preventing charge recombination. These features were corroborated by Photo-CELIV, which showed a higher density of extracted charges and increased charge carrier lifetime for Nb2O5-Ti3C2 based devices. Hence, the results unveiled in this work indicate that MXenes are promising 2D materials for tuning Nb2O5 based ETLs. Future works shall focus on other MXene compounds to further boost PSC performance and stability. (AU) | |
| 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 |
| 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: | 20/16470-0 - Desenvolvimento de nanocompósitos à base de MXenes e polímeros condutores intrínsecos para aplicações como HTL em células solares de perovskita |
| Beneficiário: | Hugo Gajardoni de Lemos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 21/03379-7 - Aplicação de Novos Materiais como Eletrodo em Supercapacitores Flexíveis |
| Beneficiário: | João Victor Morais Lima |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |