Molecular encapsulation of naphthalene diimide (NDI) based π-conjugated polymers: A tool for understanding photoluminescence

DOI: 10.1002/anie.202110139

Authors: Jeroen Royakkers (University of Cambridge) , Kunping Guo (University College London) , Daniel T. W. Toolan (The University of Sheffield) , Liang-Wen Feng (Northwestern University) , Alessandro Minotto (University College London) , Daniel G. Congrave (University College London) , Magda Danowska (University of Cambridge) , Weixuan Zeng (University of Cambridge) , Andrew Bond (University of Cambridge) , Mohammed Al-Hashimi (Texas A&M University at Qatar) , Tobin J. Marks (Northwestern University) , Antonio Facchetti (Northwestern University) , Franco Cacialli (University College London) , Hugo Bronstein (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition

State: Published (Approved)
Published: September 2021
Diamond Proposal Number(s): 23587

Abstract: Conjugated polymers are an important class of chromophores for optoelectronic devices. Understanding and controlling their excited state properties, in particular, radiative and non-radiative recombination processes are among the greatest challenges that must be overcome. We report the synthesis and characterization of a molecularly encapsulated naphthalene diimide-based polymer, one of the most successfully used motifs, and explore its structural and optical properties. The molecular encapsulation enables a detailed understanding of the effect interpolymer interactions. We reveal that the non-encapsulated analogue P(NDI-2OD-T) undergoes aggregation enhanced emission; an effect that is suppressed upon encapsulation due to an increasing p-interchain stacking distance. This suggests that decreasing p-stacking distances may be an attractive method to enhance the radiative properties of conjugated polymers in contrast to the current paradigm where it is viewed as a source of optical quenching.

Diamond Keywords: Semiconductors; Organic Light Emitting Diodes (OLEDs)

Subject Areas: Materials, Chemistry, Physics


Instruments: I07-Surface & interface diffraction

Added On: 18/09/2021 19:36

Documents:
anie.202110139.pdf

Discipline Tags:

Surfaces Physics Physical Chemistry Chemistry Materials Science interfaces and thin films Polymer Science

Technical Tags:

Scattering Wide Angle X-ray Scattering (WAXS) Grazing Incidence Wide Angle Scattering (GIWAXS)