Frequency Resolved Photoluminescence (PL), Delayed Fluorescence and Triplet-Triplet Annihilation In 7Φ-Conjugated Polymers

1999 ◽  
Vol 561 ◽  
Author(s):  
J. Partee ◽  
E. L. Frankevich ◽  
B. Uhlhom ◽  
J. Shinar ◽  
Y. Ding ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Strong Evidence ◽  
Delayed Fluorescence ◽  
Phenylene Vinylene ◽  
Total Emission ◽  
Phenylene Ethynylene ◽  
Frozen Solutions ◽  
Triplet Triplet Annihilation

ABSTRACTThe delayed fluorescence of poly(p-phenylene vinylene) (PPV) and poly(p-phenylene ethynylene) (PPE) derivative solids and frozen solutions at 20 K is described. It provides strong evidence for triplet-triplet annihilation to singlets excitons accounting for up to ∼3% of the total emission in PPV films and ∼1.5% in PPE powder. It also yields triplet lifetimes of 70 and 110 μs in PPV films and frozen solutions, and ∼200 and ∼500 μs in PPE powder and frozen solutions, respectively.

Frequency Resolved Photoluminescence (PL), Delayed Fluorescence and Triplet-Triplet Annihilation in Φ-Conjugated Polymers

1999 ◽  
Vol 558 ◽  
Author(s):  
J. Partee ◽  
E. L. Frankevich ◽  
B. Uhlhorn ◽  
J. Shinar ◽  
Y. Ding ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Strong Evidence ◽  
Delayed Fluorescence ◽  
Phenylene Vinylene ◽  
Total Emission ◽  
Phenylene Ethynylene ◽  
Frozen Solutions ◽  
Triplet Triplet Annihilation

ABSTRACTThe delayed fluorescence of poly(p-phenylene vinylene) (PPV) and poly(p-phenylene ethynylene) (PPE) derivative solids and frozen solutions at 20 K is described. It provides strong evidence for triplet-triplet annihilation to singlets excitons accounting for up to ∼3% of the total emission in PPV films and ∼1.5% in PPE powder. It also yields triplet lifetimes of 70 and 110 μs in PPV films and frozen solutions, and ∼200 and ∼500 μs in PPE powder and frozen solutions, respectively.

scholarly journals The performance of conjugated polymers as emitters for triplet–triplet annihilation upconversion

2021 ◽  
Author(s):  
Riley O’Shea ◽  
Can Gao ◽  
Tze Cin Owyong ◽  
Jonathan M. White ◽  
Wallace W. H. Wong
Keyword(s):  
Conjugated Polymers ◽  
Phenylene Vinylene ◽  
Phenylene Ethynylene ◽  
Triplet Triplet Annihilation

Phenylene–ethynylene–anthracene copolymer was used as the emitter in triplet–triplet annihilation upconversion outperforming well-known poly(phenylene–vinylene)s.

Intra-chain triplet–triplet annihilation and delayed fluorescence in soluble conjugated polymers

2001 ◽  
Vol 340 (5-6) ◽  
pp. 467-472 ◽  
Author(s):  
A.P. Monkman ◽  
H.D. Burrows ◽  
I. Hamblett ◽  
S. Navaratnam
Keyword(s):  
Conjugated Polymers ◽  
Delayed Fluorescence ◽  
Triplet Triplet Annihilation

scholarly journals Limitations of conjugated polymers as emitters in triplet-triplet annihilation upconversion

2021 ◽  
Author(s):  
Riley O'shea ◽  
Can Gao ◽  
Siobhan Bradley ◽  
Tze Cin Owyong ◽  
Na Wu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Building Blocks ◽  
Phenylene Vinylene ◽  
Triplet Triplet Annihilation

A series of poly(phenylene-vinylene)s (PPV) was synthesized with two monomer building blocks containing methoxy and 2-ethylhexyloxy (MEH) sidechains and sterically bulky fluorenyloxy sidechain. Variations in monomer incorporation were achieved by...

scholarly journals Revealing the influence of steric bulk on the triplet–triplet annihilation upconversion performance of conjugated polymers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Riley O’shea ◽  
William J. Kendrick ◽  
Can Gao ◽  
Tze Cin Owyong ◽  
Jonathan M. White ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Conjugated Polymers ◽  
Transfer Process ◽  
Energy Transfer Process ◽  
Phenylene Vinylene ◽  
Phosphorescence Quenching ◽  
Photoluminescence Quantum Yield ◽  
Triplet Triplet Annihilation

AbstractA series of poly(phenylene-vinylene)-based copolymers are synthesized using the Gilch method incorporating monomers with sterically bulky sidechains. The photochemical upconversion performance of these polymers as emitters are investigated using a palladium tetraphenyltetrabenzoporphyrin triplet sensitizer and MEH-PPV as reference. Increased incorporation of sterically bulky monomers leads to a reduction in the upconversion efficiency despite improved photoluminescence quantum yield. A phosphorescence quenching study indicates issues with the energy transfer process between the triplet sensitizer and the copolymers. The best performance with 0.18% upconversion quantum yield is obtained for the copolymer containing 10% monomer with bulky sidechains.

Delayed Fluorescence and Triplet-Triplet Annihilation inπ-Conjugated Polymers

1999 ◽  
Vol 82 (18) ◽  
pp. 3673-3676 ◽  
Author(s):  
J. Partee ◽  
E. L. Frankevich ◽  
B. Uhlhorn ◽  
J. Shinar ◽  
Y. Ding ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Delayed Fluorescence ◽  
Triplet Triplet Annihilation

Advancing conjugated polymers into nanometer-scale devices

2006 ◽  
Vol 78 (10) ◽  
pp. 1803-1822 ◽  
Author(s):  
Wenping Hu ◽  
Hiroshi Nakashima ◽  
Erjing Wang ◽  
Kazuaki Furukawa ◽  
Hongxiang Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Molecular Level ◽  
Nanometer Scale ◽  
Transport Mechanisms ◽  
Phenylene Ethynylene ◽  
Polymer Molecules ◽  
Polymer Electronics ◽  
End Groups

In this article, we review the possibility of combining conjugated polymers with nanometer-scale devices (nanodevices), in order to introduce the properties associated with conjugated polymers into such nanodevices. This approach envisages combining the highly topical disciplines of polymer electronics and nanoelectronics to engender a new subdirection of polymer nanoelectronics, which can serve as a tool to probe the behavior of polymer molecules at the nanometer/molecular level, and contribute to clarifying transport mechanisms in conjugated polymers. In this study, we exemplify this combination, using a family of linear and conjugated polymers, poly(p-phenylene-ethynylene)s (PPEs) with thiolacetate-functionalized end groups.

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