FROM SOLUTION TO DEVICE: AGGREGATION-INDUCED ENHANCED EMISSION AND TWISTED INTRAMOLECULAR CHARGE TRANSFER IN A PYRIDYLCARBODINITRILE FOR TUNABLE PHOTOLUMINESCENCE AND OLED APPLICATIONS

Carolina Vesga Hernández; Dayvid Mello Nascimento; Rafael Dos Santos Carvalho; Arthur Rodrigues Jardim Barreto; Marlin Jeannette Pedrozo Penafiel; Julia Rodrigues de Noronha; Luís Maqueira; Davi Back; Leandro H. Zucolotto Cocca; Ricardo Queiroz Aucélio; Leonardo de Boni; Marco Cremona; Jones Limberger

Título do Trabalho

Autores

Carolina Vesga Hernández
Dayvid Mello Nascimento
Rafael Dos Santos Carvalho
Arthur Rodrigues Jardim Barreto
Marlin Jeannette Pedrozo Penafiel
Julia Rodrigues de Noronha
Luís Maqueira
Davi Back
Leandro H. Zucolotto Cocca
Ricardo Queiroz Aucélio
Leonardo de Boni
Marco Cremona
Jones Limberger

Modalidade

Pôster - resumo

Área temática

Dispositivos optoeletrônicos

Data de Publicação

27/05/2026

País da Publicação

Brasil

Idioma da Publicação

pt-BR

Página do Trabalho

https://www.even3.com.br/anais/workshop-do-ineo-2026/1462651-from-solution-to-device--aggregation-induced-enhanced-emission-and-twisted-intramolecular-charge-transfer-in-a-p

ISBN

978-65-272-2467-9

Palavras-Chave

Pyridine-based luminophore, Solid-state emission, Organic light-emitting diodes (OLEDs)

Resumo

The development of organic luminophores with tunable photophysical properties is crucial for advancing high-performance optoelectronic devices. In this work, a series of phenylpyridylcarbonitrile (PPC) derivatives with donor–p–acceptor (D–p–A) architectures were synthesized and systematically investigated, aiming to correlate molecular structure with solvent-, aggregation-, and device-dependent emission behavior. Four PPC derivatives bearing distinct donor groups: methylphenyl (2M-PPC), biphenyl (BP-PPC), 9,9-dimethylfluorenyl (FL-PPC), and 3,5-dimethyl-4-methoxyphenyl (MT-PPC), were obtained and evaluated [1]. Among them, MT-PPC exhibited remarkable photophysical versatility, characterized by pronounced solvatochromism with an emission shift of 118 nm, indicative of twisted intramolecular charge transfer (TICT) states. Additionally, MT-PPC showed aggregation-induced enhanced emission (AIEE), with a nineteenfold increase in photoluminescence quantum yield upon aggregation. Thin films incorporating MT-PPC in an Bis(9,9-spirobifluorene-3-yl)-phenylphosphane oxide (SF3PO) host matrix displayed tunable emission as a function of dopant concentration, with lower concentrations leading to blue-shifted photoluminescence [1]. Organic light-emitting diodes (OLEDs) fabricated with MT-PPC at doping levels of 5%, 10%, and 20% demonstrated concentration-dependent electroluminescence, with emission maxima ranging from 438 to 460 nm. The devices were built in a conventional multilayer architecture consisting of an indium tin oxide (ITO) anode, a hole-injection layer of molybdenum trioxide (MoO3), a hole-transport layer of 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), an exciton-blocking layer of 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), the emissive layer composed of 9,9'-(sulfonylbis(4,1-phenylene))bis(9H-carbazole) (SF3PO) doped with MT-PPC, an electron-transport layer of 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB), a lithium fluoride (LiF) electron-injection layer, and an aluminum (Al) cathode [2]. All organic and metallic layers were sequentially deposited by thermal evaporation under high vacuum (~10-4 Pa), ensuring controlled film growth, well-defined interfaces, and reproducible device fabrication. The device containing 20% MT-PPC achieved a maximum luminance of 977 cd/m² and an external quantum efficiency of 0.80% [1]. The luminance and EQE values of the fabricated OLEDs still need to be optimized improving the device structure. However, these results highlight MT-PPC as a multifunctional luminophore with emission tunability across solution, solid-state films, and OLEDs, underscoring its potential for applications in sensors and advanced optoelectronic technologies. The authors would like to thank FAPERJ, CAPES, CNPq (408449/2024-1), FAPESP (2025/27044-5) and INCT-INEO for partial financial support. References: [1] Vesga-Hernández, C., Carvalho, R. S., Barreto, A., Peñafiel, M. J. P., Noronha, J. R., Maqueira, L., Back, D., Nascimento, D. M., Cocca, L. H. Z., Aucélio, R. Q., Boni, L., Cremona, M., & Limberger, J. (2025). Journal of Photochemistry & Photobiology, A: Chemistry, 464, 116312. https://doi.org/10.1016/j.jphotochem.2025.116312 [2] Liu, X., Zhang, Y., Li, Z., Wang, Y., Chen, J., & Zhao, Z. (2020). Highly efficient blue-emitting OLEDs based on pyridine-containing emitters. Chemical Engineering Journal, 401, 126107. https://doi.org/10.1016/j.cej.2020.126107

Título do Evento: Workshop do INEO 2026
Cidade do Evento: Nazaré Paulista
Título dos Anais do Evento: Anais do Workshop do INEO 2026
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

HERNÁNDEZ, Carolina Vesga et al.. FROM SOLUTION TO DEVICE: AGGREGATION-INDUCED ENHANCED EMISSION AND TWISTED INTRAMOLECULAR CHARGE TRANSFER IN A PYRIDYLCARBODINITRILE FOR TUNABLE PHOTOLUMINESCENCE AND OLED APPLICATIONS.. In: Anais do Workshop do INEO 2026. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2026. Disponível em: https//www.even3.com.br/anais/workshop-do-ineo-2026/1462651-FROM-SOLUTION-TO-DEVICE--AGGREGATION-INDUCED-ENHANCED-EMISSION-AND-TWISTED-INTRAMOLECULAR-CHARGE-TRANSFER-IN-A-P. Acesso em: 10/08/2026