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Annihilator dimers enhance triplet fusion upconversion

Journal Article · · Chemical Science
DOI:https://doi.org/10.1039/c8sc03725f· OSTI ID:1624967
 [1];  [2];  [3];  [4];  [2]
  1. Department of Chemistry; Columbia University; New York; USA; DOE/OSTI
  2. Rowland Institute at Harvard University; Cambridge; USA
  3. Photonics Initiative; Advanced Science Research Center; City University of New York; New York; USA
  4. Department of Chemistry; Columbia University; New York; USA
Optical upconversion is a net process by which two low energy photons are converted into one higher energy photon. There is vast potential to exploit upconversion in applications ranging from solar energy and biological imaging to data storage and photocatalysis. Here, we link two upconverting chromophores together to synthesize a series of novel tetracene dimers for use as annihilators. When compared with the monomer annihilator, TIPS–tetracene, the dimers yield a strong enhancement in the triplet fusion process, also known as triplet–triplet annihilation, as demonstrated via a large increase in upconversion efficiency and an order of magnitude reduction of the threshold power for maximum yield. Along with the ongoing rapid improvements to sensitizer materials, the dimerization improvements demonstrated here open the way to a wide variety of emerging upconversion applications.
Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
OSTI ID:
1624967
Journal Information:
Chemical Science, Journal Name: Chemical Science Journal Issue: 14 Vol. 10; ISSN 2041-6520; ISSN CSHCBM
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Engineering 3D perovskites for photon interconversion applications journal March 2020
Singlet fission in a hexacene dimer: energetics dictate dynamics journal January 2020
Fluorescence upconversion by triplet–triplet annihilation in all-organic poly(methacrylate)-terpolymers journal January 2020
Lessons from intramolecular singlet fission with covalently bound chromophores journal January 2020

Figures / Tables (5)


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