On how electron density affects the redox stability of phenothiazine sensitizers on semiconducting surfaces. Issue 17 (3rd February 2017)

• Record Type: Journal Article
• Authors: Chiykowski, Valerie A.; Lam, Brian; Du, Chuan; Berlinguette, Curtis P.
• Is Part Of: Chemical communications. Volume 53:Issue 17(2017)
• Page Start: 2547
• Page End: 2550
• Publication Date: 2017-02-03
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc09992k
• Languages: English
• ISSNs: 1359-7345

Abstract

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. 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.