Titre :

Importance of Short-Range Order in Governing Thin Film Morphology and Electronic Properties of Polymeric Organic Semiconductors

Auteur(s) :

Seifrid, Martin [Auteur]
Chemistry and Biochemistry [Santa Barbara] [CCS-UCSB]
Karki, Akchheta [Auteur]
Chemistry and Biochemistry [Santa Barbara] [CCS-UCSB]
Wakidi, Hiba [Auteur]
Chemistry and Biochemistry [Santa Barbara] [CCS-UCSB]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Welton, Claire [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Bazan, Guillermo C. [Auteur]
National University of Singapore [NUS]
Chemistry and Biochemistry [Santa Barbara] [CCS-UCSB]
Chmelka, Bradley F. [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Nguyen, Thuc-Quyen [Auteur]
Chemistry and Biochemistry [Santa Barbara] [CCS-UCSB]
Reddy, Manjunatha [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Titre de la revue :

Chemistry of Materials

Nom court de la revue :

Chem. Mater.

Numéro :

36

Pagination :

1214-1227

Éditeur :

American Chemical Society (ACS)

Date de publication :

2024-01-23

ISSN :

0897-4756

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Semiconducting polymers provide a ubiquitous platform for a range of applications in molecular electronics and photovoltaics, but the ordered and disordered regions of these materials impart different optoelectronic ...
Lire la suite >Semiconducting polymers provide a ubiquitous platform for a range of applications in molecular electronics and photovoltaics, but the ordered and disordered regions of these materials impart different optoelectronic properties. By resolving local morphology using solid-state magnetic resonance spectroscopy and modeling techniques, here, we demonstrate that the PTB7-Th donor–acceptor (D–A) copolymer and P3HT and MEH-PPV homopolymers exhibit different degrees of the short-range order, which can be associated with the large differences in their charge carrier mobilities. The high degree of local order in PTB7-Th (84–99%) is facilitated by noncovalent interactions between D and A moieties. In contrast to this, the reduced local order in P3HT (30–44%) and MEH-PPV (39–43%) homopolymers is due to the distortions in the vicinities of backbone and side chain moieties that lead to conformationally tilted polymer chains. Combined solid-state NMR and density functional theory (DFT) modeling allows the degree of backbone torsion in these materials to be determined, and insights into packing interactions are obtained by two-dimensional (2D) 1H–1H, 1H–13C, and 1H–19F correlation NMR spectroscopy. In addition, the different paramagnetic species and hyperfine interactions are analyzed by EPR spectroscopy and are expected to influence the charge carrier mobilities. A detailed analysis of the local structures presented in this study helps explain the morphological anomalies and their impact on bulk charge carrier mobilities and electronic density of states, thus providing essential insights into the morphology–property relationships in polymeric organic semiconductors.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)
Chimie du Solide RMN et matériaux inorganiques (RM2I)

Date de dépôt :

2024-02-29T07:59:04Z
2024-03-01T10:30:17Z
2024-04-15T11:52:39Z