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

Physical Chemistry Chemical Physics : PCCP
Can GaoWallace W H Wong

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 so...Continue Reading

References

Mar 22, 2008·The Journal of Physical Chemistry. a·Tanya N Singh-RachfordFelix N Castellano
Nov 13, 2008·Journal of the American Chemical Society·Tanya N Singh-RachfordFelix N Castellano
Feb 14, 2009·Inorganic Chemistry·Tanya N Singh-Rachford, Felix N Castellano
Mar 1, 2012·Journal of the American Chemical Society·Qian LiuFuyou Li
Mar 1, 2012·Physical Chemistry Chemical Physics : PCCP·Angelo MonguzziFrancesco Meinardi
Jan 18, 2013·The Journal of Organic Chemistry·Yutaka FujiwaraKenji Kobayashi
Jul 16, 2014·ACS Nano·Anna J SvaganKatharina Landfester
Dec 11, 2014·Chemical Reviews·Jing ZhouFuyou Li
Jan 13, 2015·Physical Chemistry Chemical Physics : PCCP·S HoseinkhaniA Monguzzi
Oct 21, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Nobuo KimizukaMasa-Aki Morikawa
Jul 21, 2017·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Damir DzeboBo Albinsson
Jan 1, 2016·Chemical Science·Yuen Yap ChengTimothy W Schmidt
Jul 31, 2018·The Journal of Physical Chemistry Letters·Biplab JoarderNobuo Kimizuka

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Methods Mentioned

BETA
transmission electron microscopy

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