Issue 17, 2017
From the journal:

Chemical Communications

On how electron density affects the redox stability of phenothiazine sensitizers on semiconducting surfaces†

Valerie A. Chiykowski,a   Brian Lam,a   Chuan Dua  and  Curtis P. Berlinguette ORCID logo *a  

* Corresponding authors

a Departments of Chemistry and Chemical & Biological Engineering, The University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada
E-mail: cberling@chem.ubc.ca

Abstract

The stabilities of three organic dyes that differ only by two substituents (–OMe, –H and –Br) about the phenothiazine donor unit were evaluated when immobilized on a semiconductor surface. All three dyes delivered modest power conversion efficiencies (PCEs) in the dye-sensitized solar cell (DSSC), but maintained 75% of their initial PCE over 300 h of sustained simulated sunlight. Electron-donating substituents increased the stability of the phenothiazine radical unit created after light-induced charge injection into the semiconductor; however, this did not translate to higher DSSC stability, which appears to be more sensitive to the basicity of the anchoring group for this series.

Graphical abstract: On how electron density affects the redox stability of phenothiazine sensitizers on semiconducting surfaces

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Article information

DOI
https://doi.org/10.1039/C6CC09992K
Article type
Communication
Submitted
15 Dec 2016
Accepted
17 Jan 2017
First published
03 Feb 2017

Chem. Commun., 2017,53, 2547-2550

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On how electron density affects the redox stability of phenothiazine sensitizers on semiconducting surfaces

V. A. Chiykowski, B. Lam, C. Du and C. P. Berlinguette, Chem. Commun., 2017, 53, 2547 DOI: 10.1039/C6CC09992K

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