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A Dibenzo[g,p]chrysene-Based Organic Semiconductor with Small Exciton Binding Energy via Molecular Aggregation.
Mori, Hiroki; Jinnai, Seihou; Hosoda, Yasushi; Muraoka, Azusa; Nakayama, Ken-Ichi; Saeki, Akinori; Ie, Yutaka.
Afiliación
  • Mori H; The Institute of Scientific and Industrial Research (SANKEN), Osaka University 8-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
  • Jinnai S; The Institute of Scientific and Industrial Research (SANKEN), Osaka University 8-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
  • Hosoda Y; Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
  • Muraoka A; The Institute of Scientific and Industrial Research (SANKEN), Osaka University 8-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
  • Nakayama KI; Department of Mathematics, Physics and Computer Science, Japan Women's University, 2-8-1, Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan.
  • Saeki A; Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan.
  • Ie Y; Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Angew Chem Int Ed Engl ; : e202409964, 2024 Jul 12.
Article en En | MEDLINE | ID: mdl-38994550
ABSTRACT
Exciton binding energy (Eb) is understood as the energy required to dissociate an exciton in free-charge carriers, and is known to be an important parameter in determining the performance of organic opto-electronic devices. However, the development of a molecular design to achieve a small level of Eb in the solid state continues to lag behind. Here, to investigate the relationship between aggregation and Eb, star-shaped π-conjugated compounds DBC-RD and TPE-RD were developed using dibenzo[g,p]chrysene (DBC) and tetraphenylethylene (TPE). Theoretical calculations and physical measurements in solution showed no apparent differences between DBC-RD and TPE-RD, indicating that these molecules possess similar properties on a single-molecule level. By contrast, pristine films incorporating these molecules showed significantly different levels of electron affinity, ionization potential, and optical gap. Also, DBC-RD had a smaller Eb value of 0.24 eV compared with that of TPE-RD (0.42 eV). However, these molecules showed similar Eb values under dispersed conditions, which suggested that the decreased Eb of DBC-RD in pristine film is induced by molecular aggregation. By comparison with TPE-RD, DBC-RD showed superior performances in single-component organic solar cells and organic photocatalysts. These results indicate that a molecular design suitable for aggregation is important to decrease the Eb in films.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Alemania