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Title: Annihilator dimers enhance triplet fusion upconversion

Journal Article · · Chemical Science
DOI: https://doi.org/10.1039/c8sc03725f · OSTI ID:1624967

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 Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704: DGE 16-44869; DMR 1351293
OSTI ID:
1624967
Journal Information:
Chemical Science, Vol. 10, Issue 14; ISSN 2041-6520
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

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
Engineering 3D perovskites for photon interconversion applications journal March 2020

Figures / Tables (5)