Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 11, 2020
Previous Article Next Article

Triplet fusion upconversion using sterically protected 9,10-diphenylanthracene as the emitter

Author affiliations

Abstract

Improving the efficiency of triplet fusion upconversion (TF-UC) in the solid-state is still challenging due to the aggregation and phase separation of chromophores. In this work, two 9,10-diphenylanthracene (DPA) derivatives based on the modification of the 9,10-phenyl rings with bulky isopropyl groups (bDPA-1 and bDPA-2) were used as emitters. By using platinum octaethylporphyrin (PtOEP) as the sensitizer, TF-UC performance was comprehensively investigated in 3 media: toluene solution, polyurethane thin film and nano/micro-crystals in a polyvinyl alcohol matrix. Only a small difference in upconversion efficiency between the bulky DPAs and the DPA reference was observed in toluene solution and polyurethane thin film. However, a large improvement of TF-UC quantum yield was achieved in bDPA-2/PtOEP crystals (ΦUC = (0.92 ± 0.05)%) with a low excitation intensity threshold (52 mW cm−2) compared to that of DPA/PtOEP crystals (ΦUC = (0.09 ± 0.03)%). This difference was largely attributed to improved dispersibility of the PtOEP sensitizer in the bDPA-2 emitter crystals. The bulky DPAs also show excellent stability under UV irradiation with exposure to oxygen compared to DPA. These results provide a strategy for developing efficient solid-state TF-UC systems based on nano/micro-particles of emitter–sensitizer mixtures.

Graphical abstract: Triplet fusion upconversion using sterically protected 9,10-diphenylanthracene as the emitter

Back to tab navigation

Supplementary files

Article information


Submitted
22 Nov 2019
Accepted
26 Feb 2020
First published
26 Feb 2020

Phys. Chem. Chem. Phys., 2020,22, 6300-6307
Article type
Paper

Triplet fusion upconversion using sterically protected 9,10-diphenylanthracene as the emitter

C. Gao, B. Zhang, C. R. Hall, L. Li, Y. Chen, Y. Zeng, T. A. Smith and W. W. H. Wong, Phys. Chem. Chem. Phys., 2020, 22, 6300
DOI: 10.1039/C9CP06311K

Social activity

Search articles by author

Spotlight

Advertisements