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Issue 2, 2016
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Developing efficient heavy-atom-free photosensitizers applicable to TTA upconversion in polymer films

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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

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Publication details

The article was received on 31 Aug 2015, accepted on 06 Nov 2015 and first published on 09 Nov 2015


Article type: Edge Article
DOI: 10.1039/C5SC03245H
Chem. Sci., 2016,7, 1233-1237
  • Open access: Creative Commons BY license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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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

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