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

Jiang Peng; Xinyan Guo; Xinpeng Jiang; Dahui Zhao; Yuguo Ma

doi:10.1039/C5SC03245H

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

Jiang Peng,^a Xinyan Guo,^a Xinpeng Jiang,^a Dahui Zhao*^a and Yuguo Ma*^a

* Corresponding authors

^a Beijing National Laboratory for Molecular Sciences, Centre for Soft Matter Science and Engineering, Key Lab of Polymer Chemistry & Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
E-mail: ygma@pku.edu.cn, dhzhao@pku.edu.cn
Fax: +86-10-62751708

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.

This article is part of the themed collection: Global Energy Challenges: Materials and Nanotechnology

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DOI: https://doi.org/10.1039/C5SC03245H
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

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

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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.

Chemical Science

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

Abstract

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

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