Jump to main content
Jump to site search

Issue 48, 2019

Gelation enabled charge separation following visible light excitation using self-assembled perylene bisimides

Author affiliations

Abstract

Perylene bisimides (PBIs) can be functionalised to enable controlled aggregation into complex supramolecular structures and are promising materials for photovoltaic and solar fuel applications. Amino acid appended PBIs such as PBI-alanine (PBI-A) have been found to form photoconductive films containing worm-like structures that enable charge transport. However, despite being strong chromophores in the visible region, when PBI-A films are prepared by drying down solutions, activity only occurs under UV illumination. This limits potential applications. The requirement for UV illumination has previously been suggested to be due to the large ion-pair energy in the low dielectric environment of the dried samples. Hydrogel films, rehydrated xerogels and dry xerogels of PBI-A can also be prepared offering an ideal sample set to examine the influence of hydration on charge-separation. Using transient absorption (TA) spectroscopy, we demonstrate a correlation between water content and efficiency of generation of long-lived charge separated states within the PBI-A materials, highlighting their potential, particularly for light-driven water splitting.

Graphical abstract: Gelation enabled charge separation following visible light excitation using self-assembled perylene bisimides

Supplementary files

Article information


Submitted
28 Oct 2019
Accepted
01 Nov 2019
First published
27 Nov 2019

This article is Open Access

Phys. Chem. Chem. Phys., 2019,21, 26466-26476
Article type
Paper

Gelation enabled charge separation following visible light excitation using self-assembled perylene bisimides

C. L. Smith, L. L. E. Mears, B. J. Greeves, E. R. Draper, J. Doutch, D. J. Adams and A. J. Cowan, Phys. Chem. Chem. Phys., 2019, 21, 26466 DOI: 10.1039/C9CP05839G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements