Issue 2, 2016

Developing efficient heavy-atom-free photosensitizers applicable to TTA upconversion in polymer films

Abstract

Heavy-atom-free triplet photosensitizers are developed by harnessing the thermally active triplet state of carbazolyl dicyanobenzene (CDCB) derivatives and applied to realize visible-to-ultraviolet photon upconversion (UC) via triplet–triplet annihilation (TTA). Demonstrating an annihilator-appending strategy, the designed sensitizers effectively realize TTA UC in polyurethane films with 2,7-di-tert-butylpyrene (DBP) as the annihilator/emitter. The covalently tethered DBP to CDCB is proven critical for achieving the superior sensitizing and UC performance in the solid matrix, essentially by suppressing the reverse ISC and more effectively transferring triplet excitons to free emitters.

Graphical abstract: Developing efficient heavy-atom-free photosensitizers applicable to TTA upconversion in polymer films

Supplementary files

Article information

Article type
Edge Article
Submitted
31 aug 2015
Accepted
06 nov 2015
First published
09 nov 2015
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2016,7, 1233-1237

Developing efficient heavy-atom-free photosensitizers applicable to TTA upconversion in polymer films

J. Peng, X. Guo, X. Jiang, D. Zhao and Y. Ma, Chem. Sci., 2016, 7, 1233 DOI: 10.1039/C5SC03245H

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.

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