| Texto completo | |
| Autor(es): Mostrar menos - |
Terres, Sophia
;
Scalon, Lucas
;
Brunner, Julius
;
Horneber, Dominik
;
Duereth, Johannes
;
Huang, Shiyu
;
Taniguchi, Takashi
;
Watanabe, Kenji
;
Nogueira, Ana Flavia
;
Hoefling, Sven
;
Klembt, Sebastian
;
Vaynzof, Yana
;
Chernikov, Alexey
Número total de Autores: 13
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ADVANCED OPTICAL MATERIALS; v. 13, n. 11, p. 9-pg., 2025-03-28. |
| Resumo | |
Two-dimensional (2D) organic-inorganic hybrid perovskites emerged as a versatile platform for light-emitting and photovoltaic applications due to their unique structural design and chemical flexibility. Their properties depend heavily on the choice of the inorganic lead halide framework and the surrounding organic layers. Recently, the introduction of chiral cations into 2D perovskites has attracted major interest to induce chirality and tune the chiro-optical response. Importantly, their optical properties are dominated by tightly bound excitons that also serve as primary carriers for energy transport. The mobility of photo-injected excitons is thus important from the perspectives of fundamental material properties and optoelectronic applications, yet remains an open question. Here, exciton propagation in 2D chiral perovskites is demonstrated using transient photoluminescence microscopy and density-dependent transport over more than 100 nanometers at room temperature is revealed with diffusion coefficients as high as 2 cm(2) s(-1). Two distinct regimes of initially rapid propagation and subsequent localization are observed. Moreover, perovskites with enantiomer pure cations exhibit faster exciton diffusion than the racemic mixture, correlated with the impact of the material composition on the disorder. Altogether, the observations of efficient exciton diffusion highlight the potential of 2D chiral perovskites to merge chiro-optical properties with strong light-matter interaction and energy transport. (AU) | |
| Processo FAPESP: | 21/12104-1 - Revelando o papel dos espaçadores orgânicos quirais nas propriedades estruturais, fotofísicas e eletrônicas de estruturas de perovskita 2D e 3D/2D |
| Beneficiário: | Lucas Scalon |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 17/11631-2 - CINE: desenvolvimento computacional de materiais utilizando simulações atomísticas, meso-escala, multi-física e inteligência artificial para aplicações energéticas |
| Beneficiário: | Juarez Lopes Ferreira da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia |
| Processo FAPESP: | 18/21401-7 - EMU concedido no processo 2017/11631-2: cluster computacional de alto desempenho - ENIAC |
| Beneficiário: | Juarez Lopes Ferreira da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 20/04406-5 - Células solares de perovskita a partir de fontes baratas, fáceis e verdes: uma abordagem sinérgica da síntese de novos materiais transportadores de buracos e do uso de solventes mais ecológicos |
| Beneficiário: | Lucas Scalon |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |