Giant Growth of Crystalline Films of 1,3,5-Tris(N-carbazolyl)benzene (TCB) and 1,3,5-Tris(diphenylamino)benzene (TDAB) on Engineered Shapes of Ionic Liquid in Vacuum

• Tipo: Artigo em Revista Científica Internacional
• Data: 2025

Autores

Farinha, AFM (Autor) Outra; Oliveira, GNP (Autor) Outra; araujo, j. p. (Autor) FCUP; Luis M N B F Santos (Autor) FCUP; Costa, JCS (Autor) FCUP

Revista

Título: Crystal Growth & Design

Vol. 25

Páginas: 612-623

ISSN: 1528-7483

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-017-Z34

DOI: 10.1021/acs.cgd.4c01355

Abstract (EN): This study demonstrates the efficacy of ionic liquid (IL)-assisted vapor deposition in achieving high-quality and distinctive crystal film growth of two organic semiconductors (OSCs): a carbazole derivative (TCB) and a phenylamine derivative (TDAB). ILs with different wetting properties (short-chain [C2C1im][NTf2] and long-chain [C8C1im][NTf2]) and engineered shapes (microdroplets and coalesced film) were utilized as solvents in a vacuum. Through a meticulously designed experimental strategy, encompassing both sequential and simultaneous deposition of the IL and the OSC, this study unveils the pivotal role of ILs in shaping the crystallization behavior of the organic compound. Differential scanning calorimetry, polarized light microscopy, high-resolution scanning electron microscopy, and X-ray diffraction were employed for the films' thermal, morphological, and structural characterization. Thin films of TDAB exhibit crystallinity and a greater tendency to grow tridimensionally, forming giant pillars. However, the typical vertical growth of TDAB on solid substrates is altered when deposition occurs on surfaces coated with ILs. The IL promotes the lateral growth of nanostructures. The experimental results reveal variations in film morphology and coverage influenced by the cation alkyl chain length of the IL. In contrast to TDAB, TCB films are amorphous when thermally evaporated on solid substrates. Notably, IL-assisted vapor deposition induces the crystallization of TCB. Furthermore, TCB films deposited on coalesced IL films exhibit enhanced crystallinity and homogeneous horizontal growth, representing a significant finding in the context of thin film deposition and semiconductor device fabrication.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12