Revealing the Transient Formation Dynamics and Optoelectronic Properties of 2D Ruddlesden-Popper Phases on 3D Perovskites

Autor(es)

Kodalle, Tim ; Moral, Raphael F. ; Scalon, Lucas ; Szostak, Rodrigo ; Abdelsamie, Maged ; Marchezi, Paulo E. ; Nogueira, Ana F. ; Sutter-Fella, Carolin M.

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED ENERGY MATERIALS; v. N/A, p. 14-pg., 2022-06-30.

Resumo

Using in situ photoluminescence measurements during the spin-coating and annealing steps, this study probes the formation of 2D layers on 3D triple cation perovskite films comparing phenylethylammonium and 2-thiophenemethylammonium iodide bulky cations. This study elucidates the formation mechanisms of the surface layers for both cases and reveals two regimes during 2D layer formation: a kinetic-driven and a thermodynamic-driven process. These driving forces result in different compositions of the 2D/3D interface for each treatment, namely, different ratios of pure 2D (n = 1) and quasi-2D (n > 1) structures. This study shows that a higher ratio of quasi-2D phases is more beneficial for device performance, as pure-2D layers may hamper current extraction. Due to a more evenly distributed formation energy profile among 2D and quasi-2D phases, highly concentrated 2-thiophenemethylammonium iodide appears to be more suited for effective surface passivation than its phenylethylammonium analog. (AU)

• Processo FAPESP: 21/01357-6 - Células solares híbridas de perovskita investigadas em operando por técnicas de radiação síncrotron
• Beneficiário: Rodrigo Szostak
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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: 19/25765-6 - Experimentos in situ com SAXS e WAXS em síncrotron para estudar reações e mecanismos de formação de (nano)materiais de halogenetos de chumbo
• Beneficiário: Raphael Fernando Moral
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• 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